/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/ldv-regression/rule60_list2.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:26,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:26,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:26,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:52:26,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:52:26,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:52:26,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:52:26,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:26,217 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:26,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:26,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:26,221 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:26,222 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:26,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:26,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:26,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:26,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:26,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:26,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:26,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:26,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:26,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:26,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:26,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:26,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:26,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:26,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:26,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:26,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:26,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:26,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:26,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:26,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:26,226 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:26,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:26,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:26,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:26,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:26,673 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:26,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2020-12-22 03:52:26,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200355284/c2890170455546b6828dcc165042d9f6/FLAG196b07058 [2020-12-22 03:52:27,416 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:27,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2020-12-22 03:52:27,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200355284/c2890170455546b6828dcc165042d9f6/FLAG196b07058 [2020-12-22 03:52:27,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200355284/c2890170455546b6828dcc165042d9f6 [2020-12-22 03:52:27,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:27,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:27,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:27,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:27,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:27,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:27" (1/1) ... [2020-12-22 03:52:27,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61dc8b81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:27, skipping insertion in model container [2020-12-22 03:52:27,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:27" (1/1) ... [2020-12-22 03:52:27,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:27,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:28,054 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/ldv-regression/rule60_list2.c_1.i[296,309] [2020-12-22 03:52:28,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:28,233 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:28,248 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/ldv-regression/rule60_list2.c_1.i[296,309] [2020-12-22 03:52:28,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:28,389 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:28,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28 WrapperNode [2020-12-22 03:52:28,390 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:28,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:28,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:28,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:28,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:28,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:28,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:28,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:28,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (1/1) ... [2020-12-22 03:52:28,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:28,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:28,478 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:28,478 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:28,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (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 03:52:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 03:52:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:29,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:29,188 INFO L299 CfgBuilder]: Removed 34 assume(true) statements. [2020-12-22 03:52:29,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:29 BoogieIcfgContainer [2020-12-22 03:52:29,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:29,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:29,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:29,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:29,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:27" (1/3) ... [2020-12-22 03:52:29,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339b43c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:29, skipping insertion in model container [2020-12-22 03:52:29,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:28" (2/3) ... [2020-12-22 03:52:29,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339b43c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:29, skipping insertion in model container [2020-12-22 03:52:29,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:29" (3/3) ... [2020-12-22 03:52:29,206 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2020-12-22 03:52:29,214 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:29,219 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-12-22 03:52:29,244 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-12-22 03:52:29,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:29,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:29,288 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:29,289 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:29,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:29,294 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:29,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:29,294 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-12-22 03:52:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-22 03:52:29,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:29,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-22 03:52:29,324 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash 925669, now seen corresponding path program 1 times [2020-12-22 03:52:29,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:29,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818847306] [2020-12-22 03:52:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:29,637 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 03:52:29,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818847306] [2020-12-22 03:52:29,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:29,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:52:29,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404816608] [2020-12-22 03:52:29,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:52:29,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:29,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:52:29,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:52:29,673 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-12-22 03:52:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:29,737 INFO L93 Difference]: Finished difference Result 85 states and 110 transitions. [2020-12-22 03:52:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:52:29,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-22 03:52:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:29,751 INFO L225 Difference]: With dead ends: 85 [2020-12-22 03:52:29,751 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 03:52:29,756 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 03:52:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 03:52:29,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 03:52:29,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 03:52:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-22 03:52:29,808 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 4 [2020-12-22 03:52:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:29,809 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-22 03:52:29,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:52:29,809 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-22 03:52:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:52:29,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:29,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:29,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:52:29,813 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:29,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:29,816 INFO L82 PathProgramCache]: Analyzing trace with hash 170685048, now seen corresponding path program 1 times [2020-12-22 03:52:29,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:29,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601633974] [2020-12-22 03:52:29,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:30,022 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 03:52:30,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601633974] [2020-12-22 03:52:30,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:30,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:52:30,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741650314] [2020-12-22 03:52:30,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:30,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:30,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:30,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:30,028 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 5 states. [2020-12-22 03:52:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:30,163 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-12-22 03:52:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:52:30,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 03:52:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:30,166 INFO L225 Difference]: With dead ends: 64 [2020-12-22 03:52:30,167 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 03:52:30,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:52:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 03:52:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-12-22 03:52:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 03:52:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-12-22 03:52:30,183 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 15 [2020-12-22 03:52:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:30,184 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-12-22 03:52:30,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-12-22 03:52:30,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:52:30,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:30,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:30,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:52:30,189 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:30,190 INFO L82 PathProgramCache]: Analyzing trace with hash 227943350, now seen corresponding path program 1 times [2020-12-22 03:52:30,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:30,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008896088] [2020-12-22 03:52:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:30,325 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 03:52:30,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008896088] [2020-12-22 03:52:30,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:30,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:52:30,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433120131] [2020-12-22 03:52:30,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:30,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:30,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:30,329 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 5 states. [2020-12-22 03:52:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:30,383 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-12-22 03:52:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:52:30,384 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 03:52:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:30,385 INFO L225 Difference]: With dead ends: 67 [2020-12-22 03:52:30,385 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 03:52:30,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:52:30,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 03:52:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 03:52:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 03:52:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-12-22 03:52:30,394 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 15 [2020-12-22 03:52:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:30,395 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-12-22 03:52:30,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-12-22 03:52:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:52:30,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:30,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:30,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 03:52:30,397 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:30,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:30,398 INFO L82 PathProgramCache]: Analyzing trace with hash 929007928, now seen corresponding path program 1 times [2020-12-22 03:52:30,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:30,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125002795] [2020-12-22 03:52:30,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:30,593 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 03:52:30,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125002795] [2020-12-22 03:52:30,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:30,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 03:52:30,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536285045] [2020-12-22 03:52:30,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:52:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:52:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:52:30,597 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 9 states. [2020-12-22 03:52:30,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:30,840 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-12-22 03:52:30,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:52:30,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-22 03:52:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:30,842 INFO L225 Difference]: With dead ends: 54 [2020-12-22 03:52:30,843 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 03:52:30,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:52:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 03:52:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-22 03:52:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 03:52:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-22 03:52:30,851 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 15 [2020-12-22 03:52:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:30,852 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-22 03:52:30,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:52:30,852 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-22 03:52:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:52:30,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:30,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:30,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 03:52:30,853 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:30,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:30,854 INFO L82 PathProgramCache]: Analyzing trace with hash -93151004, now seen corresponding path program 1 times [2020-12-22 03:52:30,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:30,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738136093] [2020-12-22 03:52:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:30,998 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 03:52:30,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738136093] [2020-12-22 03:52:30,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:30,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 03:52:30,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462416882] [2020-12-22 03:52:31,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:52:31,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:31,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:52:31,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:52:31,001 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 12 states. [2020-12-22 03:52:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:31,399 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-12-22 03:52:31,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:52:31,400 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-12-22 03:52:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:31,401 INFO L225 Difference]: With dead ends: 54 [2020-12-22 03:52:31,402 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 03:52:31,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:52:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 03:52:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 03:52:31,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 03:52:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-12-22 03:52:31,424 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 19 [2020-12-22 03:52:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:31,424 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-12-22 03:52:31,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:52:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-12-22 03:52:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:52:31,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:31,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:31,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 03:52:31,426 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash -93091422, now seen corresponding path program 1 times [2020-12-22 03:52:31,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:31,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48080521] [2020-12-22 03:52:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:31,559 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 03:52:31,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48080521] [2020-12-22 03:52:31,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:31,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 03:52:31,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720773754] [2020-12-22 03:52:31,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:52:31,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:31,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:52:31,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:52:31,563 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 8 states. [2020-12-22 03:52:31,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:31,760 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-12-22 03:52:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:52:31,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-22 03:52:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:31,762 INFO L225 Difference]: With dead ends: 52 [2020-12-22 03:52:31,762 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 03:52:31,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:52:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 03:52:31,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 03:52:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 03:52:31,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-12-22 03:52:31,767 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 19 [2020-12-22 03:52:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:31,768 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-12-22 03:52:31,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:52:31,768 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-12-22 03:52:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 03:52:31,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:31,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:31,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 03:52:31,770 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:31,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:31,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1793070580, now seen corresponding path program 1 times [2020-12-22 03:52:31,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:31,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131655032] [2020-12-22 03:52:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:31,849 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 03:52:31,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131655032] [2020-12-22 03:52:31,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:31,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 03:52:31,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98613628] [2020-12-22 03:52:31,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:31,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:31,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:31,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:31,852 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 5 states. [2020-12-22 03:52:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:31,931 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-12-22 03:52:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:52:31,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-22 03:52:31,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:31,932 INFO L225 Difference]: With dead ends: 50 [2020-12-22 03:52:31,932 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 03:52:31,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:52:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 03:52:31,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-12-22 03:52:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 03:52:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-12-22 03:52:31,938 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 25 [2020-12-22 03:52:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:31,938 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-12-22 03:52:31,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-12-22 03:52:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 03:52:31,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:31,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:31,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 03:52:31,940 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1793130162, now seen corresponding path program 1 times [2020-12-22 03:52:31,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:31,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208350853] [2020-12-22 03:52:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:32,067 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 03:52:32,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208350853] [2020-12-22 03:52:32,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:32,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 03:52:32,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343315846] [2020-12-22 03:52:32,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:52:32,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:32,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:52:32,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:52:32,070 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 12 states. [2020-12-22 03:52:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:32,411 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-22 03:52:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:52:32,412 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-12-22 03:52:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:32,413 INFO L225 Difference]: With dead ends: 48 [2020-12-22 03:52:32,413 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 03:52:32,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-12-22 03:52:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 03:52:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-12-22 03:52:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 03:52:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-12-22 03:52:32,418 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2020-12-22 03:52:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:32,419 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-12-22 03:52:32,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:52:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-12-22 03:52:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 03:52:32,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:32,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:32,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 03:52:32,420 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:32,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:32,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1850388464, now seen corresponding path program 1 times [2020-12-22 03:52:32,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:32,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719418093] [2020-12-22 03:52:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:32,667 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 03:52:32,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719418093] [2020-12-22 03:52:32,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:32,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 03:52:32,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668738368] [2020-12-22 03:52:32,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:52:32,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:32,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:52:32,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:52:32,670 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 11 states. [2020-12-22 03:52:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:33,130 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-22 03:52:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:52:33,130 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-22 03:52:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:33,131 INFO L225 Difference]: With dead ends: 40 [2020-12-22 03:52:33,131 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 03:52:33,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:52:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 03:52:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 03:52:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 03:52:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-12-22 03:52:33,136 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2020-12-22 03:52:33,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:33,137 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-12-22 03:52:33,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:52:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-12-22 03:52:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 03:52:33,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:33,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:33,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 03:52:33,139 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:33,139 INFO L82 PathProgramCache]: Analyzing trace with hash 758876958, now seen corresponding path program 1 times [2020-12-22 03:52:33,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:33,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972630630] [2020-12-22 03:52:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:33,351 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 03:52:33,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972630630] [2020-12-22 03:52:33,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:33,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 03:52:33,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985151605] [2020-12-22 03:52:33,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 03:52:33,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:33,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 03:52:33,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-12-22 03:52:33,356 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 14 states. [2020-12-22 03:52:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:33,675 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 03:52:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 03:52:33,678 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-12-22 03:52:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:33,679 INFO L225 Difference]: With dead ends: 52 [2020-12-22 03:52:33,679 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 03:52:33,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:52:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 03:52:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-12-22 03:52:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 03:52:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 03:52:33,694 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-12-22 03:52:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:33,695 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 03:52:33,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 03:52:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 03:52:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 03:52:33,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:33,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:33,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 03:52:33,702 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash -50469668, now seen corresponding path program 1 times [2020-12-22 03:52:33,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:33,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952352650] [2020-12-22 03:52:33,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:52:33,744 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:52:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:52:33,783 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:52:33,831 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:52:33,831 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:52:33,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 03:52:33,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:52:33 BoogieIcfgContainer [2020-12-22 03:52:33,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:52:33,924 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:52:33,924 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:52:33,925 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:52:33,925 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:29" (3/4) ... [2020-12-22 03:52:33,928 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:52:34,009 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/rule60_list2.c_1.i-witness.graphml [2020-12-22 03:52:34,009 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:52:34,011 INFO L168 Benchmark]: Toolchain (without parser) took 6281.38 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 125.9 MB in the beginning and 66.3 MB in the end (delta: 59.6 MB). Peak memory consumption was 92.7 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:34,012 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 208.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:52:34,012 INFO L168 Benchmark]: CACSL2BoogieTranslator took 658.15 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 103.5 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:34,013 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.56 ms. Allocated memory is still 151.0 MB. Free memory was 103.4 MB in the beginning and 101.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:34,014 INFO L168 Benchmark]: Boogie Preprocessor took 29.90 ms. Allocated memory is still 151.0 MB. Free memory was 101.3 MB in the beginning and 99.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:34,014 INFO L168 Benchmark]: RCFGBuilder took 713.25 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 113.2 MB in the end (delta: -13.5 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:34,015 INFO L168 Benchmark]: TraceAbstraction took 4728.57 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 112.7 MB in the beginning and 70.5 MB in the end (delta: 42.2 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:34,016 INFO L168 Benchmark]: Witness Printer took 85.05 ms. Allocated memory is still 183.5 MB. Free memory was 70.5 MB in the beginning and 66.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:52:34,019 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 151.0 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 208.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 658.15 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 103.5 MB in the end (delta: 22.2 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 55.56 ms. Allocated memory is still 151.0 MB. Free memory was 103.4 MB in the beginning and 101.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.90 ms. Allocated memory is still 151.0 MB. Free memory was 101.3 MB in the beginning and 99.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 713.25 ms. Allocated memory is still 151.0 MB. Free memory was 99.8 MB in the beginning and 113.2 MB in the end (delta: -13.5 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4728.57 ms. Allocated memory was 151.0 MB in the beginning and 183.5 MB in the end (delta: 32.5 MB). Free memory was 112.7 MB in the beginning and 70.5 MB in the end (delta: 42.2 MB). Peak memory consumption was 76.3 MB. Max. memory is 8.0 GB. * Witness Printer took 85.05 ms. Allocated memory is still 183.5 MB. Free memory was 70.5 MB in the beginning and 66.3 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L519] void * guard_malloc_counter = 0; [L534] struct list_head *elem = ((void *)0); [L544] static struct list_head head; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L546] struct list_head *dev1, *dev2; [L522] (size > 0) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:0}, head={3:0}] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [elem={0:0}, guard_malloc_counter={0:1}, head={3:0}] [L529] return __getMemory(size); [L547] dev1 = my_malloc(sizeof(*dev1)) [L522] (size > 0) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:1}, head={3:0}] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [elem={0:0}, guard_malloc_counter={0:2}, head={3:0}] [L529] return __getMemory(size); [L548] dev2 = my_malloc(sizeof(*dev2)) [L549] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:0}, guard_malloc_counter={0:2}, head={3:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [elem={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:2}, guard_malloc_counter={0:2}, head={3:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L541] COND FALSE !(entry==elem) VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L536] (new!=elem) ? (0) : __blast_assert () VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] [L6] reach_error() VAL [elem={0:1}, guard_malloc_counter={0:2}, head={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 46 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 11, TraceHistogramMax: 1, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 294 SDtfs, 972 SDslu, 653 SDs, 0 SdLazy, 847 SolverSat, 128 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, 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, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 220 NumberOfCodeBlocks, 220 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 181 ConstructedInterpolants, 0 QuantifiedInterpolants, 18821 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 0/0 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...