/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 NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:26:38,662 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 01:26:38,706 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:26:38,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:26:38,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:26:38,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:26:38,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:26:38,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:26:38,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:26:38,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:26:38,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:26:38,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:26:38,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:26:38,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:26:38,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:26:38,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:26:38,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:26:38,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:26:38,752 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 01:26:38,767 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:26:38,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:26:38,769 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:26:38,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:26:38,769 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:26:38,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:26:38,770 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:26:38,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:26:38,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:26:38,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:26:38,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:26:38,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:26:38,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:26:38,771 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:26:38,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:26:38,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:26:38,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:26:38,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:26:38,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:26:38,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:26:38,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:26:38,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:26:38,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:26:38,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:26:38,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:26:38,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:26:38,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:26:38,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:26:38,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:26:38,774 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 01:26:39,051 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:26:39,072 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:26:39,076 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:26:39,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:26:39,080 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:26:39,082 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-07-20 01:26:39,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f327f163f/44a5b6309d284aa9a900ea9414ecb7de/FLAG9f5e5a688 [2020-07-20 01:26:39,661 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:26:39,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-2.c [2020-07-20 01:26:39,670 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f327f163f/44a5b6309d284aa9a900ea9414ecb7de/FLAG9f5e5a688 [2020-07-20 01:26:40,012 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f327f163f/44a5b6309d284aa9a900ea9414ecb7de [2020-07-20 01:26:40,024 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:26:40,028 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:26:40,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:26:40,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:26:40,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:26:40,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7eeb5d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40, skipping insertion in model container [2020-07-20 01:26:40,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:26:40,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:26:40,243 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:26:40,248 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:26:40,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:26:40,280 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:26:40,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40 WrapperNode [2020-07-20 01:26:40,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:26:40,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:26:40,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:26:40,282 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:26:40,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,302 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (1/1) ... [2020-07-20 01:26:40,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:26:40,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:26:40,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:26:40,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:26:40,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (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 01:26:40,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:26:40,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:26:40,474 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 01:26:40,474 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:26:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:26:40,474 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 01:26:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:26:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:26:40,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:26:40,646 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:26:40,646 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:26:40,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:26:40 BoogieIcfgContainer [2020-07-20 01:26:40,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:26:40,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:26:40,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:26:40,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:26:40,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:26:40" (1/3) ... [2020-07-20 01:26:40,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52258d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:26:40, skipping insertion in model container [2020-07-20 01:26:40,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:40" (2/3) ... [2020-07-20 01:26:40,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52258d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:26:40, skipping insertion in model container [2020-07-20 01:26:40,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:26:40" (3/3) ... [2020-07-20 01:26:40,659 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-2.c [2020-07-20 01:26:40,671 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:26:40,682 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:26:40,699 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:26:40,727 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:26:40,728 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:26:40,728 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:26:40,728 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:26:40,728 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:26:40,729 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:26:40,729 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:26:40,729 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:26:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 01:26:40,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 01:26:40,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:40,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:40,767 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:40,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 01:26:40,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:40,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574010086] [2020-07-20 01:26:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,023 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 01:26:41,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574010086] [2020-07-20 01:26:41,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:26:41,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:26:41,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468222490] [2020-07-20 01:26:41,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:26:41,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:41,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:26:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:26:41,051 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 01:26:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:41,154 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 01:26:41,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:26:41,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 01:26:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:41,167 INFO L225 Difference]: With dead ends: 30 [2020-07-20 01:26:41,168 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 01:26:41,172 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 01:26:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 01:26:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 01:26:41,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 01:26:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 01:26:41,218 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 01:26:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:41,218 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 01:26:41,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:26:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 01:26:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 01:26:41,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:41,221 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 01:26:41,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:26:41,222 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:41,223 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 01:26:41,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:41,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997134020] [2020-07-20 01:26:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,372 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 01:26:41,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997134020] [2020-07-20 01:26:41,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478803836] [2020-07-20 01:26:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b5748b No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:41,424 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5b5748b issued 2 check-sat command(s) [2020-07-20 01:26:41,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:26:41,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:41,499 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 01:26:41,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:41,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 01:26:41,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15611755] [2020-07-20 01:26:41,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:26:41,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:41,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:26:41,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:26:41,503 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-20 01:26:41,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:41,587 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 01:26:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:26:41,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 01:26:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:41,589 INFO L225 Difference]: With dead ends: 25 [2020-07-20 01:26:41,589 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 01:26:41,591 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 01:26:41,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 01:26:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 01:26:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 01:26:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 01:26:41,598 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 01:26:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:41,599 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 01:26:41,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:26:41,599 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 01:26:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 01:26:41,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:41,600 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 01:26:41,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:26:41,815 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:41,816 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 01:26:41,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:41,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024360043] [2020-07-20 01:26:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 01:26:41,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024360043] [2020-07-20 01:26:41,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294272017] [2020-07-20 01:26:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@397e799a 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 01:26:41,997 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@397e799a issued 2 check-sat command(s) [2020-07-20 01:26:41,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:41,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 01:26:42,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:42,032 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 01:26:42,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:42,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-20 01:26:42,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327194927] [2020-07-20 01:26:42,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:26:42,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:42,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:26:42,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:26:42,035 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-20 01:26:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:42,112 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 01:26:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:26:42,113 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-20 01:26:42,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:42,114 INFO L225 Difference]: With dead ends: 28 [2020-07-20 01:26:42,114 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 01:26:42,115 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 01:26:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 01:26:42,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 01:26:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 01:26:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 01:26:42,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 01:26:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:42,123 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 01:26:42,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:26:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 01:26:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 01:26:42,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:42,125 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 01:26:42,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:42,339 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-20 01:26:42,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:42,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037598534] [2020-07-20 01:26:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,511 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 01:26:42,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037598534] [2020-07-20 01:26:42,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689532356] [2020-07-20 01:26:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3034f93f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:42,546 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3034f93f issued 2 check-sat command(s) [2020-07-20 01:26:42,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:42,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:26:42,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:42,576 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 01:26:42,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:42,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-20 01:26:42,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396904374] [2020-07-20 01:26:42,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:26:42,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:26:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:26:42,579 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-20 01:26:42,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:42,658 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 01:26:42,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 01:26:42,658 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-20 01:26:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:42,660 INFO L225 Difference]: With dead ends: 31 [2020-07-20 01:26:42,660 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 01:26:42,660 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 01:26:42,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 01:26:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 01:26:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 01:26:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 01:26:42,667 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 01:26:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:42,667 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 01:26:42,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:26:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 01:26:42,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 01:26:42,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:42,669 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 01:26:42,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:42,884 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-20 01:26:42,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:42,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434385324] [2020-07-20 01:26:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 01:26:43,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434385324] [2020-07-20 01:26:43,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278369125] [2020-07-20 01:26:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b2e6e25 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 01:26:43,104 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b2e6e25 issued 2 check-sat command(s) [2020-07-20 01:26:43,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:43,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 01:26:43,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:43,164 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 01:26:43,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:43,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-20 01:26:43,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585278326] [2020-07-20 01:26:43,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:26:43,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:43,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:26:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:26:43,169 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-20 01:26:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:43,287 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 01:26:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:26:43,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-20 01:26:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:43,289 INFO L225 Difference]: With dead ends: 34 [2020-07-20 01:26:43,289 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 01:26:43,290 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 01:26:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 01:26:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 01:26:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 01:26:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 01:26:43,305 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 01:26:43,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:43,305 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 01:26:43,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:26:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 01:26:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 01:26:43,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:43,315 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 01:26:43,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:43,517 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:43,519 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-20 01:26:43,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:43,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161315736] [2020-07-20 01:26:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:43,781 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 01:26:43,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161315736] [2020-07-20 01:26:43,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66338657] [2020-07-20 01:26:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70a487a9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:43,832 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@70a487a9 issued 2 check-sat command(s) [2020-07-20 01:26:43,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:43,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 01:26:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:43,890 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 01:26:43,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:43,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-20 01:26:43,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536922643] [2020-07-20 01:26:43,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 01:26:43,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:43,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 01:26:43,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 01:26:43,894 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-20 01:26:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:44,013 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 01:26:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 01:26:44,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-20 01:26:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:44,014 INFO L225 Difference]: With dead ends: 37 [2020-07-20 01:26:44,014 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 01:26:44,015 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 01:26:44,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 01:26:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 01:26:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 01:26:44,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 01:26:44,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 01:26:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:44,022 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 01:26:44,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 01:26:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 01:26:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 01:26:44,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:44,024 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 01:26:44,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:26:44,229 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-20 01:26:44,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:44,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522229712] [2020-07-20 01:26:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 01:26:44,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522229712] [2020-07-20 01:26:44,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699320770] [2020-07-20 01:26:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2a717b3f 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 01:26:44,451 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2a717b3f issued 2 check-sat command(s) [2020-07-20 01:26:44,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:44,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 01:26:44,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:44,484 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 01:26:44,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:44,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-20 01:26:44,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903265843] [2020-07-20 01:26:44,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 01:26:44,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:44,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 01:26:44,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 01:26:44,487 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 01:26:44,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:44,609 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 01:26:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 01:26:44,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-20 01:26:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:44,611 INFO L225 Difference]: With dead ends: 40 [2020-07-20 01:26:44,611 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 01:26:44,612 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 01:26:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 01:26:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 01:26:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 01:26:44,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 01:26:44,618 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 01:26:44,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:44,619 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 01:26:44,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 01:26:44,619 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 01:26:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 01:26:44,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:44,620 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 01:26:44,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:44,835 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-20 01:26:44,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:44,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053601813] [2020-07-20 01:26:44,836 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,059 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 01:26:45,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053601813] [2020-07-20 01:26:45,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640781008] [2020-07-20 01:26:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f1e7d1e No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:45,128 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7f1e7d1e issued 2 check-sat command(s) [2020-07-20 01:26:45,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:45,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 01:26:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 01:26:45,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:45,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-20 01:26:45,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32891052] [2020-07-20 01:26:45,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 01:26:45,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:45,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 01:26:45,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 01:26:45,164 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-20 01:26:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:45,282 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 01:26:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 01:26:45,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-20 01:26:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:45,284 INFO L225 Difference]: With dead ends: 43 [2020-07-20 01:26:45,284 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 01:26:45,285 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 01:26:45,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 01:26:45,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 01:26:45,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 01:26:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 01:26:45,291 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 01:26:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:45,291 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 01:26:45,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 01:26:45,292 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 01:26:45,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 01:26:45,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:45,293 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 01:26:45,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:45,509 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:45,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-20 01:26:45,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:45,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012468851] [2020-07-20 01:26:45,511 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:45,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 01:26:45,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012468851] [2020-07-20 01:26:45,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644593284] [2020-07-20 01:26:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b27ed18 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 01:26:45,842 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3b27ed18 issued 2 check-sat command(s) [2020-07-20 01:26:45,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:45,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 01:26:45,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:45,922 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 01:26:45,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:45,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-20 01:26:45,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842353153] [2020-07-20 01:26:45,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 01:26:45,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:45,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 01:26:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 01:26:45,928 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-20 01:26:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:46,081 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 01:26:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 01:26:46,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-20 01:26:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:46,085 INFO L225 Difference]: With dead ends: 46 [2020-07-20 01:26:46,085 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 01:26:46,086 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 01:26:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 01:26:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 01:26:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 01:26:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 01:26:46,096 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 01:26:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:46,097 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 01:26:46,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 01:26:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 01:26:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 01:26:46,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:46,101 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 01:26:46,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 01:26:46,316 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:46,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:46,317 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-20 01:26:46,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:46,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339108419] [2020-07-20 01:26:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:46,660 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 01:26:46,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339108419] [2020-07-20 01:26:46,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103084254] [2020-07-20 01:26:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b19ec81 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:46,710 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b19ec81 issued 2 check-sat command(s) [2020-07-20 01:26:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:46,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 01:26:46,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:46,763 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 01:26:46,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:46,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-20 01:26:46,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105382591] [2020-07-20 01:26:46,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 01:26:46,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:46,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 01:26:46,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:26:46,767 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-20 01:26:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:46,947 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 01:26:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 01:26:46,948 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-20 01:26:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:46,949 INFO L225 Difference]: With dead ends: 49 [2020-07-20 01:26:46,949 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 01:26:46,953 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 01:26:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 01:26:46,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 01:26:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 01:26:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 01:26:46,965 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 01:26:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:46,969 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 01:26:46,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 01:26:46,969 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 01:26:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 01:26:46,970 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:46,973 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 01:26:47,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:47,187 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-20 01:26:47,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:47,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912716555] [2020-07-20 01:26:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 01:26:47,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912716555] [2020-07-20 01:26:47,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168973803] [2020-07-20 01:26:47,511 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@86a9b44 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 01:26:47,554 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@86a9b44 issued 2 check-sat command(s) [2020-07-20 01:26:47,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:47,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 01:26:47,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:47,591 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 01:26:47,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:47,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-20 01:26:47,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504577804] [2020-07-20 01:26:47,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 01:26:47,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:47,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 01:26:47,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 01:26:47,594 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-20 01:26:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:47,792 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 01:26:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 01:26:47,793 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-20 01:26:47,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:47,794 INFO L225 Difference]: With dead ends: 52 [2020-07-20 01:26:47,794 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 01:26:47,795 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 01:26:47,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 01:26:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 01:26:47,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 01:26:47,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 01:26:47,802 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 01:26:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:47,802 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 01:26:47,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 01:26:47,802 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 01:26:47,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 01:26:47,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:47,804 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 01:26:48,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:48,019 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:48,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-20 01:26:48,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:48,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707840968] [2020-07-20 01:26:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:48,424 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 01:26:48,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707840968] [2020-07-20 01:26:48,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531238050] [2020-07-20 01:26:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3688af76 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:48,467 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3688af76 issued 2 check-sat command(s) [2020-07-20 01:26:48,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:48,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 01:26:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:48,514 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 01:26:48,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:48,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-20 01:26:48,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738225387] [2020-07-20 01:26:48,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 01:26:48,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:48,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 01:26:48,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 01:26:48,516 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-20 01:26:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:48,755 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 01:26:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 01:26:48,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-20 01:26:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:48,758 INFO L225 Difference]: With dead ends: 55 [2020-07-20 01:26:48,758 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 01:26:48,759 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 01:26:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 01:26:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 01:26:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 01:26:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 01:26:48,765 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 01:26:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:48,765 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 01:26:48,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 01:26:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 01:26:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 01:26:48,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:48,767 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 01:26:48,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 01:26:48,982 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:48,983 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-20 01:26:48,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:48,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793587275] [2020-07-20 01:26:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 01:26:49,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793587275] [2020-07-20 01:26:49,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136157686] [2020-07-20 01:26:49,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2977fd5e 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 01:26:49,542 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2977fd5e issued 2 check-sat command(s) [2020-07-20 01:26:49,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 01:26:49,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:49,594 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 01:26:49,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:49,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-20 01:26:49,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379135104] [2020-07-20 01:26:49,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 01:26:49,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:49,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 01:26:49,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 01:26:49,598 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-20 01:26:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:49,816 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 01:26:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 01:26:49,817 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-20 01:26:49,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:49,818 INFO L225 Difference]: With dead ends: 58 [2020-07-20 01:26:49,818 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 01:26:49,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-20 01:26:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 01:26:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 01:26:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 01:26:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 01:26:49,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 01:26:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:49,827 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 01:26:49,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 01:26:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 01:26:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 01:26:49,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:49,828 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 01:26:50,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 01:26:50,042 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-20 01:26:50,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:50,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988364148] [2020-07-20 01:26:50,044 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:50,482 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 01:26:50,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988364148] [2020-07-20 01:26:50,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527430314] [2020-07-20 01:26:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67fe7e89 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:50,534 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@67fe7e89 issued 2 check-sat command(s) [2020-07-20 01:26:50,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:50,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 01:26:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:50,593 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 01:26:50,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:50,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-20 01:26:50,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674590420] [2020-07-20 01:26:50,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 01:26:50,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:50,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 01:26:50,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 01:26:50,595 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-20 01:26:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:50,793 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 01:26:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 01:26:50,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-20 01:26:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:50,795 INFO L225 Difference]: With dead ends: 61 [2020-07-20 01:26:50,795 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 01:26:50,797 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 01:26:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 01:26:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 01:26:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 01:26:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 01:26:50,803 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 01:26:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:50,803 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 01:26:50,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 01:26:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 01:26:50,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 01:26:50,805 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:50,805 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 01:26:51,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 01:26:51,021 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:51,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-20 01:26:51,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:51,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320035390] [2020-07-20 01:26:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:51,563 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 01:26:51,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320035390] [2020-07-20 01:26:51,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948448821] [2020-07-20 01:26:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@733787b0 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 01:26:51,615 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@733787b0 issued 2 check-sat command(s) [2020-07-20 01:26:51,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:51,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 01:26:51,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:51,667 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 01:26:51,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:51,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-20 01:26:51,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548793805] [2020-07-20 01:26:51,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 01:26:51,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:51,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 01:26:51,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 01:26:51,671 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-20 01:26:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:51,916 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 01:26:51,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 01:26:51,917 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-20 01:26:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:51,918 INFO L225 Difference]: With dead ends: 64 [2020-07-20 01:26:51,919 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 01:26:51,920 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 01:26:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 01:26:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 01:26:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 01:26:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 01:26:51,932 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 01:26:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:51,933 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 01:26:51,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 01:26:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 01:26:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 01:26:51,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:51,934 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 01:26:52,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:52,149 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-20 01:26:52,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:52,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292925240] [2020-07-20 01:26:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@a1b3122 [2020-07-20 01:26:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:26:52,171 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:26:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:26:52,193 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:26:52,220 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:26:52,220 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:26:52,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 01:26:52,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:26:52 BoogieIcfgContainer [2020-07-20 01:26:52,295 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:26:52,302 INFO L168 Benchmark]: Toolchain (without parser) took 12271.07 ms. Allocated memory was 138.9 MB in the beginning and 364.4 MB in the end (delta: 225.4 MB). Free memory was 101.6 MB in the beginning and 204.3 MB in the end (delta: -102.8 MB). Peak memory consumption was 122.7 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:52,303 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 01:26:52,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.47 ms. Allocated memory is still 138.9 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:52,306 INFO L168 Benchmark]: Boogie Preprocessor took 30.37 ms. Allocated memory is still 138.9 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:52,307 INFO L168 Benchmark]: RCFGBuilder took 338.12 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 90.6 MB in the beginning and 172.5 MB in the end (delta: -81.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:52,307 INFO L168 Benchmark]: TraceAbstraction took 11643.09 ms. Allocated memory was 203.9 MB in the beginning and 364.4 MB in the end (delta: 160.4 MB). Free memory was 171.8 MB in the beginning and 204.3 MB in the end (delta: -32.5 MB). Peak memory consumption was 127.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:52,315 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 252.47 ms. Allocated memory is still 138.9 MB. Free memory was 101.1 MB in the beginning and 91.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.37 ms. Allocated memory is still 138.9 MB. Free memory was 91.9 MB in the beginning and 90.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.12 ms. Allocated memory was 138.9 MB in the beginning and 203.9 MB in the end (delta: 65.0 MB). Free memory was 90.6 MB in the beginning and 172.5 MB in the end (delta: -81.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11643.09 ms. Allocated memory was 203.9 MB in the beginning and 364.4 MB in the end (delta: 160.4 MB). Free memory was 171.8 MB in the beginning and 204.3 MB in the end (delta: -32.5 MB). Peak memory consumption was 127.9 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 = 15; [L13] int b = 0; VAL [a=15, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=15, m=0, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=14, m=1, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=13, m=2, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=12, m=3, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=11, m=4, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=10, m=5, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=9, m=6, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=8, m=7, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=7, m=8, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=6, m=9, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=5, m=10, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=4, m=11, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=3, m=12, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=2, m=13, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=1, m=14, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=15, \old(n)=0, \result=15, m=15, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=1, m=14, n=1, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=2, m=13, n=2, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=3, m=12, n=3, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=4, m=11, n=4, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=5, m=10, n=5, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=6, m=9, n=6, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=7, m=8, n=7, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=8, m=7, n=8, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=9, m=6, n=9, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=10, m=5, n=10, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=11, m=4, n=11, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=12, m=3, n=12, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=13, m=2, n=13, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=14, m=1, n=14, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=15, m=0, n=15, sum(n - 1, m + 1)=15] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=15, b=0, sum(a, b)=15] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=15, b=0, result=15] [L16] __VERIFIER_error() VAL [a=15, b=0, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.4s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 488 SDslu, 767 SDs, 0 SdLazy, 558 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1353 GetRequests, 1069 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 1740 NumberOfCodeBlocks, 1348 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1608 ConstructedInterpolants, 0 QuantifiedInterpolants, 267360 SizeOfPredicates, 133 NumberOfNonLiveVariables, 1829 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 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...