/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:41:21,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:41:21,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:41:21,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:41:21,736 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:41:21,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:41:21,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:41:21,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:41:21,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:41:21,767 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:41:21,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:41:21,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:41:21,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:41:21,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:41:21,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:41:21,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:41:21,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:41:21,769 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:41:21,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:41:21,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:41:21,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:41:21,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:41:21,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:41:21,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:41:21,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:41:21,771 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:41:21,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:41:21,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:41:21,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:41:21,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:41:21,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:41:22,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:41:22,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:41:22,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:41:22,178 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:41:22,179 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:41:22,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-12-22 03:41:22,261 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9218c5e0/4c852781409c422584af668e9b745c24/FLAG490880096 [2020-12-22 03:41:22,856 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:41:22,857 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c [2020-12-22 03:41:22,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9218c5e0/4c852781409c422584af668e9b745c24/FLAG490880096 [2020-12-22 03:41:23,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9218c5e0/4c852781409c422584af668e9b745c24 [2020-12-22 03:41:23,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:41:23,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:41:23,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:23,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:41:23,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:41:23,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55971f42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23, skipping insertion in model container [2020-12-22 03:41:23,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:41:23,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:41:23,441 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2020-12-22 03:41:23,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:23,458 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:41:23,476 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/drift_tenth.c.p+cfa-reducer.c[721,734] [2020-12-22 03:41:23,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:41:23,494 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:41:23,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23 WrapperNode [2020-12-22 03:41:23,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:41:23,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:23,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:41:23,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:41:23,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:41:23,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:41:23,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:41:23,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:41:23,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,549 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (1/1) ... [2020-12-22 03:41:23,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:41:23,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:41:23,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:41:23,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:41:23,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (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 [2020-12-22 03:41:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:41:23,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:41:23,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:41:23,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:41:23,951 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:41:23,951 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 03:41:23,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:23 BoogieIcfgContainer [2020-12-22 03:41:23,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:41:23,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:41:23,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:41:23,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:41:23,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:41:23" (1/3) ... [2020-12-22 03:41:23,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be0da6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:23, skipping insertion in model container [2020-12-22 03:41:23,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:41:23" (2/3) ... [2020-12-22 03:41:23,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be0da6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:41:23, skipping insertion in model container [2020-12-22 03:41:23,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:23" (3/3) ... [2020-12-22 03:41:23,963 INFO L111 eAbstractionObserver]: Analyzing ICFG drift_tenth.c.p+cfa-reducer.c [2020-12-22 03:41:23,970 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:41:23,975 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:41:24,027 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:41:24,060 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:41:24,061 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:41:24,061 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:41:24,061 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:41:24,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:41:24,061 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:41:24,062 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:41:24,062 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:41:24,089 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-12-22 03:41:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 03:41:24,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:24,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 03:41:24,107 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:24,122 INFO L82 PathProgramCache]: Analyzing trace with hash 28696774, now seen corresponding path program 1 times [2020-12-22 03:41:24,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:24,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620720619] [2020-12-22 03:41:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:24,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620720619] [2020-12-22 03:41:24,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:41:24,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:41:24,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826411591] [2020-12-22 03:41:24,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:41:24,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:24,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:41:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:24,472 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-12-22 03:41:24,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:24,513 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-22 03:41:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:41:24,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-22 03:41:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:24,535 INFO L225 Difference]: With dead ends: 16 [2020-12-22 03:41:24,535 INFO L226 Difference]: Without dead ends: 7 [2020-12-22 03:41:24,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:41:24,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2020-12-22 03:41:24,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-12-22 03:41:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-12-22 03:41:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2020-12-22 03:41:24,583 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2020-12-22 03:41:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:24,584 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2020-12-22 03:41:24,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:41:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2020-12-22 03:41:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 03:41:24,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:24,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 03:41:24,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:41:24,586 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:24,591 INFO L82 PathProgramCache]: Analyzing trace with hash 889537510, now seen corresponding path program 1 times [2020-12-22 03:41:24,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:24,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420101592] [2020-12-22 03:41:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:24,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:24,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420101592] [2020-12-22 03:41:24,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450444537] [2020-12-22 03:41:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:24,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:41:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:24,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:24,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:41:24,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715612787] [2020-12-22 03:41:24,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:41:24,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:24,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:41:24,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:41:24,827 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2020-12-22 03:41:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:24,841 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-22 03:41:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:41:24,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-12-22 03:41:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:24,842 INFO L225 Difference]: With dead ends: 11 [2020-12-22 03:41:24,843 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 03:41:24,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:41:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 03:41:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 03:41:24,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 03:41:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 03:41:24,847 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-22 03:41:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:24,847 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 03:41:24,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:41:24,848 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 03:41:24,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 03:41:24,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:24,848 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-22 03:41:25,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 03:41:25,064 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:25,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:25,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1805796550, now seen corresponding path program 2 times [2020-12-22 03:41:25,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:25,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064136678] [2020-12-22 03:41:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064136678] [2020-12-22 03:41:25,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084631761] [2020-12-22 03:41:25,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:25,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:41:25,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:25,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:25,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:41:25,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642091213] [2020-12-22 03:41:25,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:41:25,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:25,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:41:25,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:41:25,198 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2020-12-22 03:41:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:25,211 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2020-12-22 03:41:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:41:25,212 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-12-22 03:41:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:25,212 INFO L225 Difference]: With dead ends: 12 [2020-12-22 03:41:25,212 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 03:41:25,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:41:25,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 03:41:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 03:41:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 03:41:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 03:41:25,216 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 03:41:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:25,217 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 03:41:25,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:41:25,217 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 03:41:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 03:41:25,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:25,218 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2020-12-22 03:41:25,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:25,432 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:25,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash 145055718, now seen corresponding path program 3 times [2020-12-22 03:41:25,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:25,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847885625] [2020-12-22 03:41:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847885625] [2020-12-22 03:41:25,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112178992] [2020-12-22 03:41:25,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:41:25,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 03:41:25,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:41:25,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:25,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:25,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:41:25,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042609592] [2020-12-22 03:41:25,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:41:25,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:41:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:41:25,572 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2020-12-22 03:41:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:25,589 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-22 03:41:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:41:25,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-12-22 03:41:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:25,590 INFO L225 Difference]: With dead ends: 13 [2020-12-22 03:41:25,590 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 03:41:25,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:41:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 03:41:25,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 03:41:25,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 03:41:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 03:41:25,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-22 03:41:25,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:25,595 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 03:41:25,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:41:25,596 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 03:41:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 03:41:25,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:25,597 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2020-12-22 03:41:25,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:25,813 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:25,815 INFO L82 PathProgramCache]: Analyzing trace with hash 201697478, now seen corresponding path program 4 times [2020-12-22 03:41:25,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:25,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333801876] [2020-12-22 03:41:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:25,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333801876] [2020-12-22 03:41:25,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086143652] [2020-12-22 03:41:25,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-12-22 03:41:25,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:41:25,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 03:41:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:25,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:25,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 03:41:25,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760818357] [2020-12-22 03:41:25,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:41:25,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:25,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:41:25,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:41:25,964 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2020-12-22 03:41:25,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:25,979 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-22 03:41:25,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:41:25,980 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-12-22 03:41:25,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:25,981 INFO L225 Difference]: With dead ends: 14 [2020-12-22 03:41:25,981 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 03:41:25,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:41:25,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 03:41:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 03:41:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 03:41:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 03:41:25,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-22 03:41:25,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:25,986 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 03:41:25,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:41:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 03:41:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:41:25,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:25,987 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1] [2020-12-22 03:41:26,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:26,201 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1957592038, now seen corresponding path program 5 times [2020-12-22 03:41:26,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:26,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323331392] [2020-12-22 03:41:26,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:26,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323331392] [2020-12-22 03:41:26,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301602169] [2020-12-22 03:41:26,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:26,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 03:41:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:26,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 03:41:26,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:26,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:26,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 03:41:26,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693592018] [2020-12-22 03:41:26,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:41:26,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:26,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:41:26,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:41:26,394 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2020-12-22 03:41:26,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:26,410 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-22 03:41:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:41:26,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-12-22 03:41:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:26,411 INFO L225 Difference]: With dead ends: 15 [2020-12-22 03:41:26,411 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 03:41:26,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:41:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 03:41:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 03:41:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 03:41:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-22 03:41:26,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-22 03:41:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:26,415 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-22 03:41:26,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:41:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-22 03:41:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:41:26,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:26,416 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1] [2020-12-22 03:41:26,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 03:41:26,631 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:26,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:26,632 INFO L82 PathProgramCache]: Analyzing trace with hash 555748550, now seen corresponding path program 6 times [2020-12-22 03:41:26,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:26,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305693095] [2020-12-22 03:41:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:26,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305693095] [2020-12-22 03:41:26,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599138688] [2020-12-22 03:41:26,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-22 03:41:26,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 03:41:26,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:26,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:41:26,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:26,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:26,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:41:26,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705407383] [2020-12-22 03:41:26,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:41:26,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:26,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:41:26,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:41:26,823 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 10 states. [2020-12-22 03:41:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:26,842 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 03:41:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:41:26,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-12-22 03:41:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:26,843 INFO L225 Difference]: With dead ends: 16 [2020-12-22 03:41:26,843 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 03:41:26,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:41:26,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 03:41:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 03:41:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 03:41:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 03:41:26,847 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-22 03:41:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:26,848 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 03:41:26,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:41:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 03:41:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 03:41:26,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:26,849 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1] [2020-12-22 03:41:27,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:27,065 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash 48273382, now seen corresponding path program 7 times [2020-12-22 03:41:27,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:27,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741277074] [2020-12-22 03:41:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741277074] [2020-12-22 03:41:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102087196] [2020-12-22 03:41:27,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-22 03:41:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:27,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 03:41:27,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:27,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:27,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 03:41:27,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672471638] [2020-12-22 03:41:27,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:41:27,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:27,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:41:27,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:41:27,328 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 11 states. [2020-12-22 03:41:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:27,353 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-22 03:41:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:41:27,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2020-12-22 03:41:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:27,354 INFO L225 Difference]: With dead ends: 17 [2020-12-22 03:41:27,355 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 03:41:27,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:41:27,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 03:41:27,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 03:41:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:41:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-22 03:41:27,359 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-22 03:41:27,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:27,359 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-22 03:41:27,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:41:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-22 03:41:27,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:41:27,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:27,360 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1] [2020-12-22 03:41:27,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:27,575 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1496412358, now seen corresponding path program 8 times [2020-12-22 03:41:27,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:27,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230051540] [2020-12-22 03:41:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:27,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230051540] [2020-12-22 03:41:27,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537717335] [2020-12-22 03:41:27,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:41:27,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:41:27,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:41:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:27,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:27,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:41:27,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507174375] [2020-12-22 03:41:27,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:41:27,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:27,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:41:27,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:41:27,853 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2020-12-22 03:41:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:27,900 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 03:41:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:41:27,901 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-12-22 03:41:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:27,905 INFO L225 Difference]: With dead ends: 18 [2020-12-22 03:41:27,906 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 03:41:27,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:41:27,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 03:41:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 03:41:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 03:41:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 03:41:27,913 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-22 03:41:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:27,914 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 03:41:27,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:41:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 03:41:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 03:41:27,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:27,915 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1] [2020-12-22 03:41:28,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 03:41:28,116 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash -855919642, now seen corresponding path program 9 times [2020-12-22 03:41:28,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:28,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768766743] [2020-12-22 03:41:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:41:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:28,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768766743] [2020-12-22 03:41:28,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490933166] [2020-12-22 03:41:28,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 03:41:28,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 03:41:28,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:41:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:41:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:41:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:41:28,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:41:28,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:41:28,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83871370] [2020-12-22 03:41:28,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:41:28,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:41:28,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:41:28,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:41:28,367 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2020-12-22 03:41:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:41:28,394 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-22 03:41:28,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:41:28,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-12-22 03:41:28,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:41:28,395 INFO L225 Difference]: With dead ends: 19 [2020-12-22 03:41:28,396 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 03:41:28,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:41:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 03:41:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 03:41:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 03:41:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-22 03:41:28,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-22 03:41:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:41:28,401 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-22 03:41:28,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:41:28,401 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-22 03:41:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:41:28,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:41:28,402 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2020-12-22 03:41:28,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:41:28,617 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:41:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:41:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash -763767610, now seen corresponding path program 10 times [2020-12-22 03:41:28,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:41:28,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326909168] [2020-12-22 03:41:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:41:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:28,637 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:41:28,651 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:41:28,671 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:41:28,671 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:41:28,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 03:41:28,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:41:28 BoogieIcfgContainer [2020-12-22 03:41:28,709 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:41:28,710 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:41:28,710 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:41:28,710 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:41:28,711 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:41:23" (3/4) ... [2020-12-22 03:41:28,715 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-22 03:41:28,715 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:41:28,718 INFO L168 Benchmark]: Toolchain (without parser) took 5471.50 ms. Allocated memory was 152.0 MB in the beginning and 192.9 MB in the end (delta: 40.9 MB). Free memory was 127.0 MB in the beginning and 132.5 MB in the end (delta: -5.5 MB). Peak memory consumption was 36.4 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:28,718 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 152.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:41:28,719 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.43 ms. Allocated memory is still 152.0 MB. Free memory was 126.6 MB in the beginning and 116.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:28,720 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.79 ms. Allocated memory is still 152.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:28,721 INFO L168 Benchmark]: Boogie Preprocessor took 22.45 ms. Allocated memory is still 152.0 MB. Free memory was 115.4 MB in the beginning and 114.5 MB in the end (delta: 844.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:28,722 INFO L168 Benchmark]: RCFGBuilder took 393.15 ms. Allocated memory is still 152.0 MB. Free memory was 114.5 MB in the beginning and 103.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:28,722 INFO L168 Benchmark]: TraceAbstraction took 4754.16 ms. Allocated memory was 152.0 MB in the beginning and 192.9 MB in the end (delta: 40.9 MB). Free memory was 103.4 MB in the beginning and 133.0 MB in the end (delta: -29.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:28,723 INFO L168 Benchmark]: Witness Printer took 5.47 ms. Allocated memory is still 192.9 MB. Free memory was 133.0 MB in the beginning and 132.5 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:41:28,728 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 152.0 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 246.43 ms. Allocated memory is still 152.0 MB. Free memory was 126.6 MB in the beginning and 116.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.79 ms. Allocated memory is still 152.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 22.45 ms. Allocated memory is still 152.0 MB. Free memory was 115.4 MB in the beginning and 114.5 MB in the end (delta: 844.4 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 393.15 ms. Allocated memory is still 152.0 MB. Free memory was 114.5 MB in the beginning and 103.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4754.16 ms. Allocated memory was 152.0 MB in the beginning and 192.9 MB in the end (delta: 40.9 MB). Free memory was 103.4 MB in the beginning and 133.0 MB in the end (delta: -29.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 8.0 GB. * Witness Printer took 5.47 ms. Allocated memory is still 192.9 MB. Free memory was 133.0 MB in the beginning and 132.5 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 29]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 16. Possible FailurePath: [L1] int __return_main; VAL [__return_main=0] [L9] float main__tick = 0.10000000149011612; [L10] float main__time = 0.0; [L11] int main__i; [L12] main__i = 0 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND TRUE main__i < 10 [L16] main__time = main__time + main__tick [L17] main__i = main__i + 1 VAL [__return_main=0] [L14] COND FALSE !(main__i < 10) [L23] int __tmp_1; [L24] __tmp_1 = main__time != 1.0 [L25] int __VERIFIER_assert__cond; [L26] __VERIFIER_assert__cond = __tmp_1 VAL [__return_main=0] [L27] COND TRUE __VERIFIER_assert__cond == 0 VAL [__return_main=0] [L29] reach_error() VAL [__return_main=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.6s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 0 SDslu, 156 SDs, 0 SdLazy, 118 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 156 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 200 NumberOfCodeBlocks, 199 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 166 ConstructedInterpolants, 0 QuantifiedInterpolants, 3786 SizeOfPredicates, 0 NumberOfNonLiveVariables, 527 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 0/330 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...