/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/test27-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:55,594 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:55,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:55,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:52:55,750 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:55,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:55,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:55,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:55,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:55,812 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:55,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:55,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:55,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:55,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:55,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:55,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:55,815 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:55,815 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:55,815 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:55,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:55,816 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:55,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:55,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:55,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:55,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:55,817 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:55,817 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:55,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:55,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:55,818 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:55,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:56,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:56,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:56,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:56,283 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:56,283 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:56,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test27-2.c [2020-12-22 03:52:56,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3145cbfb9/661492c8e5754993b1de613320d0da4d/FLAG6ecf5ba72 [2020-12-22 03:52:57,057 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:57,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test27-2.c [2020-12-22 03:52:57,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3145cbfb9/661492c8e5754993b1de613320d0da4d/FLAG6ecf5ba72 [2020-12-22 03:52:57,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3145cbfb9/661492c8e5754993b1de613320d0da4d [2020-12-22 03:52:57,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:57,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:57,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:57,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:57,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:57,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a676f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57, skipping insertion in model container [2020-12-22 03:52:57,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:57,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:57,610 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/test27-2.c[1224,1237] [2020-12-22 03:52:57,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:57,624 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:57,649 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/test27-2.c[1224,1237] [2020-12-22 03:52:57,651 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:57,669 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:57,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57 WrapperNode [2020-12-22 03:52:57,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:57,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:57,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:57,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:57,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:57,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:57,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:57,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:57,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (1/1) ... [2020-12-22 03:52:57,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:57,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:57,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:57,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:57,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (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 03:52:57,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:52:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:52:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:52:57,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:57,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:57,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:52:57,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:52:58,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:58,442 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 03:52:58,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:58 BoogieIcfgContainer [2020-12-22 03:52:58,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:58,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:58,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:58,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:58,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:57" (1/3) ... [2020-12-22 03:52:58,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6e6f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:58, skipping insertion in model container [2020-12-22 03:52:58,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:57" (2/3) ... [2020-12-22 03:52:58,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6e6f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:58, skipping insertion in model container [2020-12-22 03:52:58,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:58" (3/3) ... [2020-12-22 03:52:58,454 INFO L111 eAbstractionObserver]: Analyzing ICFG test27-2.c [2020-12-22 03:52:58,462 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:58,468 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:52:58,492 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:52:58,529 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:58,530 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:58,530 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:58,530 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:58,530 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:58,530 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:58,531 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:58,531 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 03:52:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:52:58,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:58,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:58,557 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-12-22 03:52:58,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:58,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529932652] [2020-12-22 03:52:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:58,873 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 03:52:58,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529932652] [2020-12-22 03:52:58,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:58,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:52:58,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756193313] [2020-12-22 03:52:58,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:52:58,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:58,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:52:58,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:58,912 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 03:52:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:58,932 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2020-12-22 03:52:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:52:58,934 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 03:52:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:58,960 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:52:58,960 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 03:52:58,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:58,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 03:52:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 03:52:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 03:52:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-22 03:52:58,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-12-22 03:52:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:58,997 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-22 03:52:58,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:52:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-22 03:52:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:52:58,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:58,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:58,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:52:58,999 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:59,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-12-22 03:52:59,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:59,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851850888] [2020-12-22 03:52:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,081 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 03:52:59,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851850888] [2020-12-22 03:52:59,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:59,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:52:59,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810952376] [2020-12-22 03:52:59,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:52:59,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:59,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:52:59,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:52:59,086 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-12-22 03:52:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:59,123 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 03:52:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:52:59,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 03:52:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:59,125 INFO L225 Difference]: With dead ends: 24 [2020-12-22 03:52:59,125 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 03:52:59,126 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 03:52:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 03:52:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-22 03:52:59,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:52:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 03:52:59,130 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-22 03:52:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:59,131 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 03:52:59,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:52:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 03:52:59,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:52:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:59,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:59,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:52:59,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2020-12-22 03:52:59,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:59,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849416771] [2020-12-22 03:52:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,192 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 03:52:59,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849416771] [2020-12-22 03:52:59,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495103738] [2020-12-22 03:52:59,193 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 03:52:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:52:59,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:59,381 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 03:52:59,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:59,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:52:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076543826] [2020-12-22 03:52:59,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:59,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:59,385 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-12-22 03:52:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:59,419 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-22 03:52:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:52:59,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 03:52:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:59,421 INFO L225 Difference]: With dead ends: 26 [2020-12-22 03:52:59,421 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 03:52:59,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 03:52:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 03:52:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-22 03:52:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 03:52:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 03:52:59,427 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-12-22 03:52:59,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:59,427 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 03:52:59,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 03:52:59,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:52:59,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:59,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:59,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 03:52:59,643 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:59,644 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2020-12-22 03:52:59,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:59,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656840380] [2020-12-22 03:52:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:52:59,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656840380] [2020-12-22 03:52:59,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326103740] [2020-12-22 03:52:59,839 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 03:52:59,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:52:59,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:59,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:52:59,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:00,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:00,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:53:00,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810425784] [2020-12-22 03:53:00,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:53:00,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:00,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:53:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:53:00,029 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2020-12-22 03:53:00,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:00,086 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-22 03:53:00,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:53:00,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-22 03:53:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:00,089 INFO L225 Difference]: With dead ends: 28 [2020-12-22 03:53:00,090 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 03:53:00,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 03:53:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 03:53:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-12-22 03:53:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 03:53:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 03:53:00,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-12-22 03:53:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:00,110 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 03:53:00,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:53:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 03:53:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 03:53:00,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:00,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:00,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:00,331 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:00,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:00,332 INFO L82 PathProgramCache]: Analyzing trace with hash 123871506, now seen corresponding path program 3 times [2020-12-22 03:53:00,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:00,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85746681] [2020-12-22 03:53:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:00,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85746681] [2020-12-22 03:53:00,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394783062] [2020-12-22 03:53:00,421 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 03:53:00,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 03:53:00,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:00,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:53:00,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:00,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:00,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:53:00,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182054120] [2020-12-22 03:53:00,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:53:00,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:00,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:53:00,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:53:00,676 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-12-22 03:53:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:00,710 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-22 03:53:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:53:00,711 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-22 03:53:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:00,712 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:53:00,712 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:53:00,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 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 03:53:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:53:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 03:53:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 03:53:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 03:53:00,721 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-12-22 03:53:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:00,722 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 03:53:00,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:53:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 03:53:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:53:00,724 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:00,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:00,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:00,939 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:00,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1444204464, now seen corresponding path program 4 times [2020-12-22 03:53:00,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:00,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135338341] [2020-12-22 03:53:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:01,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135338341] [2020-12-22 03:53:01,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082842536] [2020-12-22 03:53:01,091 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 03:53:01,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:53:01,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 03:53:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:01,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:01,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 03:53:01,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643728185] [2020-12-22 03:53:01,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 03:53:01,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 03:53:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:53:01,279 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-12-22 03:53:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:01,329 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 03:53:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 03:53:01,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-22 03:53:01,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:01,331 INFO L225 Difference]: With dead ends: 32 [2020-12-22 03:53:01,331 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 03:53:01,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 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 03:53:01,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 03:53:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 03:53:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 03:53:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 03:53:01,336 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-12-22 03:53:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:01,336 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 03:53:01,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 03:53:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 03:53:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 03:53:01,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:01,338 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:01,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:01,553 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:01,554 INFO L82 PathProgramCache]: Analyzing trace with hash -831690738, now seen corresponding path program 5 times [2020-12-22 03:53:01,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:01,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910412433] [2020-12-22 03:53:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:01,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910412433] [2020-12-22 03:53:01,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809074987] [2020-12-22 03:53:01,752 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 03:53:02,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 03:53:02,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:02,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 03:53:02,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:02,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:02,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:02,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 03:53:02,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685651070] [2020-12-22 03:53:02,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 03:53:02,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:02,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 03:53:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:53:02,123 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2020-12-22 03:53:02,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:02,163 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 03:53:02,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 03:53:02,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-12-22 03:53:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:02,165 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:53:02,165 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 03:53:02,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 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 03:53:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 03:53:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-22 03:53:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 03:53:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-22 03:53:02,170 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2020-12-22 03:53:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:02,171 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-22 03:53:02,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 03:53:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-22 03:53:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 03:53:02,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:02,172 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:02,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 03:53:02,387 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash -616519604, now seen corresponding path program 6 times [2020-12-22 03:53:02,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:02,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779052495] [2020-12-22 03:53:02,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:02,492 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 03:53:02,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779052495] [2020-12-22 03:53:02,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045722321] [2020-12-22 03:53:02,493 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 03:53:04,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 03:53:04,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:04,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:53:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:04,792 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 03:53:04,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:04,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:53:04,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307940746] [2020-12-22 03:53:04,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:53:04,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:04,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:53:04,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:53:04,795 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-22 03:53:04,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:04,849 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-22 03:53:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:53:04,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-12-22 03:53:04,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:04,851 INFO L225 Difference]: With dead ends: 36 [2020-12-22 03:53:04,851 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 03:53:04,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 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 03:53:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 03:53:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-22 03:53:04,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 03:53:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-22 03:53:04,856 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2020-12-22 03:53:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:04,856 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-22 03:53:04,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:53:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-22 03:53:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 03:53:04,857 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:04,857 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:05,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:05,071 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:05,072 INFO L82 PathProgramCache]: Analyzing trace with hash 4509962, now seen corresponding path program 7 times [2020-12-22 03:53:05,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:05,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349966250] [2020-12-22 03:53:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:05,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349966250] [2020-12-22 03:53:05,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642765491] [2020-12-22 03:53:05,279 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 03:53:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:05,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 03:53:05,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:05,433 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:05,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:05,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 03:53:05,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171827451] [2020-12-22 03:53:05,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:53:05,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:53:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:53:05,440 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 11 states. [2020-12-22 03:53:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:05,517 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-12-22 03:53:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 03:53:05,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-22 03:53:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:05,519 INFO L225 Difference]: With dead ends: 38 [2020-12-22 03:53:05,519 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 03:53:05,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 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 03:53:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 03:53:05,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-12-22 03:53:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 03:53:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-12-22 03:53:05,524 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2020-12-22 03:53:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:05,525 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-12-22 03:53:05,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:53:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-12-22 03:53:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 03:53:05,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:05,526 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:05,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:05,740 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -186531256, now seen corresponding path program 8 times [2020-12-22 03:53:05,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:05,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337955214] [2020-12-22 03:53:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:05,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337955214] [2020-12-22 03:53:05,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047755097] [2020-12-22 03:53:05,876 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 03:53:05,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:53:05,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:05,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:53:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:06,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:06,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:53:06,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588561849] [2020-12-22 03:53:06,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:53:06,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:06,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:53:06,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:53:06,069 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2020-12-22 03:53:06,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:06,138 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-12-22 03:53:06,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:53:06,139 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-12-22 03:53:06,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:06,140 INFO L225 Difference]: With dead ends: 40 [2020-12-22 03:53:06,140 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 03:53:06,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 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 03:53:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 03:53:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 03:53:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 03:53:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 03:53:06,150 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2020-12-22 03:53:06,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:06,150 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 03:53:06,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:53:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 03:53:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 03:53:06,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:06,151 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:06,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 03:53:06,357 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash 906451974, now seen corresponding path program 9 times [2020-12-22 03:53:06,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:06,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471903308] [2020-12-22 03:53:06,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:06,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:53:06,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471903308] [2020-12-22 03:53:06,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278880324] [2020-12-22 03:53:06,515 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 03:56:20,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 03:56:20,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:56:20,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:56:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:56:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 03:56:20,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:56:20,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:56:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281259141] [2020-12-22 03:56:20,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:56:20,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:56:20,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:56:20,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:56:20,384 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-12-22 03:56:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:56:20,452 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-12-22 03:56:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:56:20,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-12-22 03:56:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:56:20,453 INFO L225 Difference]: With dead ends: 41 [2020-12-22 03:56:20,453 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 03:56:20,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 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 03:56:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 03:56:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 03:56:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 03:56:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-22 03:56:20,458 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-12-22 03:56:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:56:20,458 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-22 03:56:20,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:56:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-22 03:56:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 03:56:20,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:56:20,460 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:56:20,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:56:20,674 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:56:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:56:20,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1003651516, now seen corresponding path program 10 times [2020-12-22 03:56:20,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:56:20,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752791379] [2020-12-22 03:56:20,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:56:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:56:20,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:56:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:56:21,340 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:56:21,399 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:56:21,399 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:56:21,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 03:56:21,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:56:21 BoogieIcfgContainer [2020-12-22 03:56:21,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:56:21,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:56:21,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:56:21,476 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:56:21,476 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:58" (3/4) ... [2020-12-22 03:56:21,479 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:56:21,541 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test27-2.c-witness.graphml [2020-12-22 03:56:21,541 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:56:21,543 INFO L168 Benchmark]: Toolchain (without parser) took 204148.70 ms. Allocated memory was 173.0 MB in the beginning and 221.2 MB in the end (delta: 48.2 MB). Free memory was 147.2 MB in the beginning and 169.4 MB in the end (delta: -22.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:21,544 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 173.0 MB. Free memory is still 146.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:56:21,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.98 ms. Allocated memory is still 173.0 MB. Free memory was 147.0 MB in the beginning and 136.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:21,545 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.88 ms. Allocated memory is still 173.0 MB. Free memory was 136.8 MB in the beginning and 135.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:21,546 INFO L168 Benchmark]: Boogie Preprocessor took 37.51 ms. Allocated memory is still 173.0 MB. Free memory was 135.1 MB in the beginning and 133.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:21,546 INFO L168 Benchmark]: RCFGBuilder took 685.11 ms. Allocated memory is still 173.0 MB. Free memory was 133.6 MB in the beginning and 114.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:21,547 INFO L168 Benchmark]: TraceAbstraction took 203029.43 ms. Allocated memory was 173.0 MB in the beginning and 221.2 MB in the end (delta: 48.2 MB). Free memory was 114.0 MB in the beginning and 173.1 MB in the end (delta: -59.1 MB). Peak memory consumption was 87.3 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:21,547 INFO L168 Benchmark]: Witness Printer took 65.83 ms. Allocated memory is still 221.2 MB. Free memory was 173.1 MB in the beginning and 169.4 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:56:21,551 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 173.0 MB. Free memory is still 146.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 273.98 ms. Allocated memory is still 173.0 MB. Free memory was 147.0 MB in the beginning and 136.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 45.88 ms. Allocated memory is still 173.0 MB. Free memory was 136.8 MB in the beginning and 135.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.51 ms. Allocated memory is still 173.0 MB. Free memory was 135.1 MB in the beginning and 133.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 685.11 ms. Allocated memory is still 173.0 MB. Free memory was 133.6 MB in the beginning and 114.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 203029.43 ms. Allocated memory was 173.0 MB in the beginning and 221.2 MB in the end (delta: 48.2 MB). Free memory was 114.0 MB in the beginning and 173.1 MB in the end (delta: -59.1 MB). Peak memory consumption was 87.3 MB. Max. memory is 8.0 GB. * Witness Printer took 65.83 ms. Allocated memory is still 221.2 MB. Free memory was 173.1 MB in the beginning and 169.4 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 55]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] struct cont cont; [L24] struct dummy dummy; [L25] struct dummy *dummies[10]; [L26] int a[10]; [L27] int i, *pa; [L28] i = __VERIFIER_nondet_int() [L29] int j = 0; [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND TRUE j < 10 [L30] a[j] = __VERIFIER_nondet_int() [L34] dummies[j] = 0 [L29] j++ [L29] COND FALSE !(j < 10) [L36] COND TRUE i >= 0 && i < 9 [L37] a[i] = i [L38] dummy.array = &a[i] [L39] dummies[i + 1] = &dummy [L40] cont.array = &dummies[0] [L41] EXPR cont.array [L41] EXPR cont.array[i] [L41] EXPR cont.array[i]->array [L41] pa = &cont.array[i]->array[i] [L42] EXPR a[i] [L42] COND TRUE a[i] > 0 [L43] EXPR dummies[i + 1] [L43] EXPR dummies[i + 1]->array [L43] EXPR dummies[i + 1]->array[i] [L43] i = dummies[i + 1]->array[i] - 10 [L44] EXPR \read(*pa) [L44] COND FALSE !(i < *pa) [L18] EXPR pc->array [L18] EXPR pc->array[i] [L18] EXPR pc->array[i]->array [L18] EXPR pc->array[i]->array[i] [L18] return pc->array[i]->array[i] == i; [L47] COND TRUE !check(&cont, i) [L55] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 202.8s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 140 SDtfs, 55 SDslu, 520 SDs, 0 SdLazy, 189 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 257 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=11, 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, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 197.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 430 NumberOfCodeBlocks, 430 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 379 ConstructedInterpolants, 0 QuantifiedInterpolants, 16761 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1404 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 0/570 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...