/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/test25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 03:52:47,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 03:52:47,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 03:52:47,819 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 03:52:47,919 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 03:52:47,920 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 03:52:47,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 03:52:47,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 03:52:47,980 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 03:52:47,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 03:52:47,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 03:52:47,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 03:52:47,985 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 03:52:47,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 03:52:47,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 03:52:47,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 03:52:47,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 03:52:47,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 03:52:47,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 03:52:47,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 03:52:47,988 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 03:52:47,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 03:52:47,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 03:52:47,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 03:52:47,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 03:52:47,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 03:52:47,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 03:52:47,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 03:52:47,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 03:52:47,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 03:52:47,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 03:52:47,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 03:52:47,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 03:52:47,991 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 03:52:48,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 03:52:48,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 03:52:48,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 03:52:48,471 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 03:52:48,472 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 03:52:48,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test25-1.c [2020-12-22 03:52:48,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97cc186a4/28d7bee590414554b511e21116cd88cf/FLAGc30c7c731 [2020-12-22 03:52:49,140 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 03:52:49,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test25-1.c [2020-12-22 03:52:49,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97cc186a4/28d7bee590414554b511e21116cd88cf/FLAGc30c7c731 [2020-12-22 03:52:49,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97cc186a4/28d7bee590414554b511e21116cd88cf [2020-12-22 03:52:49,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 03:52:49,519 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 03:52:49,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:49,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 03:52:49,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 03:52:49,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44b965d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49, skipping insertion in model container [2020-12-22 03:52:49,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 03:52:49,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 03:52:49,807 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/test25-1.c[936,949] [2020-12-22 03:52:49,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:49,823 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 03:52:49,860 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/test25-1.c[936,949] [2020-12-22 03:52:49,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 03:52:49,887 INFO L208 MainTranslator]: Completed translation [2020-12-22 03:52:49,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49 WrapperNode [2020-12-22 03:52:49,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 03:52:49,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:49,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 03:52:49,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 03:52:49,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 03:52:49,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 03:52:49,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 03:52:49,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 03:52:49,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:49,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:50,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:50,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:50,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (1/1) ... [2020-12-22 03:52:50,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 03:52:50,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 03:52:50,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 03:52:50,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 03:52:50,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (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 03:52:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 03:52:50,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 03:52:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 03:52:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 03:52:50,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 03:52:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 03:52:50,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 03:52:50,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 03:52:50,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 03:52:50,486 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 03:52:50,487 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 03:52:50,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:50 BoogieIcfgContainer [2020-12-22 03:52:50,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 03:52:50,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 03:52:50,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 03:52:50,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 03:52:50,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 03:52:49" (1/3) ... [2020-12-22 03:52:50,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cef584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:50, skipping insertion in model container [2020-12-22 03:52:50,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 03:52:49" (2/3) ... [2020-12-22 03:52:50,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59cef584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 03:52:50, skipping insertion in model container [2020-12-22 03:52:50,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:50" (3/3) ... [2020-12-22 03:52:50,542 INFO L111 eAbstractionObserver]: Analyzing ICFG test25-1.c [2020-12-22 03:52:50,549 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 03:52:50,554 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 03:52:50,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 03:52:50,600 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 03:52:50,601 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 03:52:50,601 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 03:52:50,601 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 03:52:50,601 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 03:52:50,601 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 03:52:50,601 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 03:52:50,602 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 03:52:50,617 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 03:52:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 03:52:50,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:50,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:50,623 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:50,630 INFO L82 PathProgramCache]: Analyzing trace with hash -631347226, now seen corresponding path program 1 times [2020-12-22 03:52:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:50,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149825135] [2020-12-22 03:52:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:50,910 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 03:52:50,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149825135] [2020-12-22 03:52:50,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:50,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 03:52:50,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140559740] [2020-12-22 03:52:50,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 03:52:50,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:50,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 03:52:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 03:52:50,936 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 03:52:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:50,955 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2020-12-22 03:52:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 03:52:50,956 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 03:52:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:50,965 INFO L225 Difference]: With dead ends: 30 [2020-12-22 03:52:50,966 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 03:52:50,969 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 03:52:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 03:52:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 03:52:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 03:52:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-12-22 03:52:51,006 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-12-22 03:52:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:51,006 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-12-22 03:52:51,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 03:52:51,007 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-12-22 03:52:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 03:52:51,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:51,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:51,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 03:52:51,008 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:51,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:51,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1697064536, now seen corresponding path program 1 times [2020-12-22 03:52:51,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:51,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745625992] [2020-12-22 03:52:51,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:51,068 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 03:52:51,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745625992] [2020-12-22 03:52:51,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 03:52:51,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 03:52:51,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850530680] [2020-12-22 03:52:51,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 03:52:51,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:51,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 03:52:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 03:52:51,072 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-12-22 03:52:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:51,091 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 03:52:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 03:52:51,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 03:52:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:51,092 INFO L225 Difference]: With dead ends: 24 [2020-12-22 03:52:51,093 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 03:52:51,094 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 03:52:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 03:52:51,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-12-22 03:52:51,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 03:52:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-22 03:52:51,098 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-12-22 03:52:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:51,098 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-22 03:52:51,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 03:52:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-22 03:52:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 03:52:51,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:51,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:51,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 03:52:51,100 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:51,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1434190826, now seen corresponding path program 1 times [2020-12-22 03:52:51,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:51,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418152742] [2020-12-22 03:52:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:51,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:51,207 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 03:52:51,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418152742] [2020-12-22 03:52:51,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427712863] [2020-12-22 03:52:51,211 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 03:52:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:51,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 03:52:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:51,434 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 03:52:51,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:51,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 03:52:51,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215507300] [2020-12-22 03:52:51,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:51,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:51,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:51,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 03:52:51,443 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2020-12-22 03:52:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:51,496 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-22 03:52:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 03:52:51,497 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-22 03:52:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:51,498 INFO L225 Difference]: With dead ends: 26 [2020-12-22 03:52:51,498 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 03:52:51,499 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 03:52:51,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 03:52:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-12-22 03:52:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 03:52:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-12-22 03:52:51,503 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2020-12-22 03:52:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:51,503 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-12-22 03:52:51,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-12-22 03:52:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 03:52:51,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:51,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:51,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 03:52:51,720 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:51,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:51,721 INFO L82 PathProgramCache]: Analyzing trace with hash 201480788, now seen corresponding path program 2 times [2020-12-22 03:52:51,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:51,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520011004] [2020-12-22 03:52:51,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:51,795 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 03:52:51,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520011004] [2020-12-22 03:52:51,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655525013] [2020-12-22 03:52:51,796 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 03:52:51,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 03:52:51,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:51,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 03:52:51,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:51,988 INFO L348 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-12-22 03:52:51,989 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-12-22 03:52:51,993 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:52:51,996 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:52:51,996 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:52:51,997 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-12-22 03:52:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 03:52:52,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 03:52:52,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-22 03:52:52,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330646695] [2020-12-22 03:52:52,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 03:52:52,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 03:52:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 03:52:52,016 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-12-22 03:52:52,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:52,085 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-12-22 03:52:52,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:52:52,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-22 03:52:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:52,086 INFO L225 Difference]: With dead ends: 23 [2020-12-22 03:52:52,086 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 03:52:52,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 03:52:52,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 03:52:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 03:52:52,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 03:52:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 03:52:52,092 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2020-12-22 03:52:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:52,092 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 03:52:52,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 03:52:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 03:52:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 03:52:52,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:52,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:52,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:52,307 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1859304665, now seen corresponding path program 1 times [2020-12-22 03:52:52,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:52,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956539104] [2020-12-22 03:52:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 03:52:52,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956539104] [2020-12-22 03:52:52,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646187402] [2020-12-22 03:52:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 03:52:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 03:52:52,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 03:52:52,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:52,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 03:52:52,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996100781] [2020-12-22 03:52:52,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 03:52:52,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:52,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 03:52:52,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 03:52:52,540 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-12-22 03:52:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:52,581 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-22 03:52:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 03:52:52,582 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-22 03:52:52,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:52,584 INFO L225 Difference]: With dead ends: 32 [2020-12-22 03:52:52,584 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 03:52:52,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 03:52:52,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 03:52:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-12-22 03:52:52,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 03:52:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-22 03:52:52,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-12-22 03:52:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:52,596 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-22 03:52:52,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 03:52:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-22 03:52:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 03:52:52,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:52,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:52,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:52,813 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash 291228695, now seen corresponding path program 2 times [2020-12-22 03:52:52,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:52,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088511331] [2020-12-22 03:52:52,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 03:52:52,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088511331] [2020-12-22 03:52:52,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015553018] [2020-12-22 03:52:52,885 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 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 03:52:52,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:52:52,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:52,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 03:52:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 03:52:52,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:52,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 03:52:52,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708028846] [2020-12-22 03:52:52,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 03:52:52,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:52,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 03:52:52,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 03:52:52,988 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2020-12-22 03:52:53,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:53,029 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-12-22 03:52:53,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 03:52:53,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-22 03:52:53,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:53,032 INFO L225 Difference]: With dead ends: 34 [2020-12-22 03:52:53,032 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 03:52:53,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 03:52:53,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 03:52:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 03:52:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 03:52:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-12-22 03:52:53,038 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-12-22 03:52:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:53,039 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-12-22 03:52:53,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 03:52:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-12-22 03:52:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 03:52:53,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:53,042 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:53,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:53,257 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:53,258 INFO L82 PathProgramCache]: Analyzing trace with hash 903742421, now seen corresponding path program 3 times [2020-12-22 03:52:53,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:53,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300543895] [2020-12-22 03:52:53,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 03:52:53,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300543895] [2020-12-22 03:52:53,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006747240] [2020-12-22 03:52:53,331 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 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 03:52:53,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 03:52:53,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 03:52:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:53,521 INFO L348 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-12-22 03:52:53,521 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-12-22 03:52:53,524 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:52:53,526 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:52:53,527 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:52:53,527 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-12-22 03:52:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 03:52:53,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:53,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-12-22 03:52:53,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866910555] [2020-12-22 03:52:53,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 03:52:53,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:53,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 03:52:53,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-12-22 03:52:53,556 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-12-22 03:52:53,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:53,687 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2020-12-22 03:52:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:52:53,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-22 03:52:53,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:53,688 INFO L225 Difference]: With dead ends: 38 [2020-12-22 03:52:53,689 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 03:52:53,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:52:53,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 03:52:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-12-22 03:52:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 03:52:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-22 03:52:53,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-12-22 03:52:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:53,694 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-22 03:52:53,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 03:52:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-22 03:52:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 03:52:53,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:53,695 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:53,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 03:52:53,906 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1251069224, now seen corresponding path program 4 times [2020-12-22 03:52:53,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:53,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717875492] [2020-12-22 03:52:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 03:52:53,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717875492] [2020-12-22 03:52:53,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836893507] [2020-12-22 03:52:53,984 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 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 03:52:54,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:52:54,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:54,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 03:52:54,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:54,166 INFO L348 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2020-12-22 03:52:54,167 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 12 [2020-12-22 03:52:54,169 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:52:54,171 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:52:54,171 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:52:54,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:5 [2020-12-22 03:52:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 03:52:54,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:54,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-22 03:52:54,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769048939] [2020-12-22 03:52:54,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:52:54,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:54,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:52:54,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:52:54,190 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 13 states. [2020-12-22 03:52:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:54,385 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-12-22 03:52:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 03:52:54,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-12-22 03:52:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:54,386 INFO L225 Difference]: With dead ends: 44 [2020-12-22 03:52:54,386 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 03:52:54,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:52:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 03:52:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 03:52:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 03:52:54,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 03:52:54,392 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2020-12-22 03:52:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:54,392 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 03:52:54,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:52:54,392 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 03:52:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 03:52:54,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:54,393 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:54,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:54,606 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:54,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:54,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1378869733, now seen corresponding path program 5 times [2020-12-22 03:52:54,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:54,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457642487] [2020-12-22 03:52:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 03:52:54,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457642487] [2020-12-22 03:52:54,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925594467] [2020-12-22 03:52:54,700 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 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 03:52:55,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 03:52:55,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:55,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 03:52:55,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 03:52:55,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:55,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 03:52:55,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034863610] [2020-12-22 03:52:55,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 03:52:55,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:55,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 03:52:55,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 03:52:55,966 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-12-22 03:52:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:56,014 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-22 03:52:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 03:52:56,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-12-22 03:52:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:56,017 INFO L225 Difference]: With dead ends: 48 [2020-12-22 03:52:56,017 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 03:52:56,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 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 03:52:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 03:52:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-12-22 03:52:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 03:52:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-22 03:52:56,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2020-12-22 03:52:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:56,034 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-22 03:52:56,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 03:52:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-22 03:52:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 03:52:56,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:56,036 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:56,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:56,250 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:56,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1005994073, now seen corresponding path program 6 times [2020-12-22 03:52:56,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:56,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938030306] [2020-12-22 03:52:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 03:52:56,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938030306] [2020-12-22 03:52:56,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793557387] [2020-12-22 03:52:56,366 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 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 03:52:57,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 03:52:57,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:57,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 03:52:57,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:57,826 INFO L348 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2020-12-22 03:52:57,826 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 12 [2020-12-22 03:52:57,828 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:52:57,830 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:52:57,831 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:52:57,831 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:5 [2020-12-22 03:52:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-22 03:52:57,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:57,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2020-12-22 03:52:57,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387129465] [2020-12-22 03:52:57,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 03:52:57,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 03:52:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 03:52:57,858 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 16 states. [2020-12-22 03:52:58,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:58,170 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2020-12-22 03:52:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 03:52:58,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-22 03:52:58,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:58,171 INFO L225 Difference]: With dead ends: 52 [2020-12-22 03:52:58,172 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 03:52:58,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-22 03:52:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 03:52:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-22 03:52:58,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 03:52:58,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-22 03:52:58,177 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2020-12-22 03:52:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:58,178 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-22 03:52:58,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 03:52:58,178 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-22 03:52:58,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 03:52:58,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:58,179 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:58,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 03:52:58,380 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1595148508, now seen corresponding path program 7 times [2020-12-22 03:52:58,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:58,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338100216] [2020-12-22 03:52:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 03:52:58,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338100216] [2020-12-22 03:52:58,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203387018] [2020-12-22 03:52:58,506 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 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 03:52:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:58,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 03:52:58,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 03:52:58,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:58,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 03:52:58,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93083057] [2020-12-22 03:52:58,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 03:52:58,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:58,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 03:52:58,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 03:52:58,654 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-12-22 03:52:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:58,705 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-22 03:52:58,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 03:52:58,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-12-22 03:52:58,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:58,709 INFO L225 Difference]: With dead ends: 56 [2020-12-22 03:52:58,709 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 03:52:58,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 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 03:52:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 03:52:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-22 03:52:58,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 03:52:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-22 03:52:58,715 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2020-12-22 03:52:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:58,715 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-22 03:52:58,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 03:52:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-22 03:52:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 03:52:58,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:58,716 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:58,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:58,930 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1671756646, now seen corresponding path program 8 times [2020-12-22 03:52:58,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:58,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160503714] [2020-12-22 03:52:58,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:52:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 03:52:59,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160503714] [2020-12-22 03:52:59,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232797832] [2020-12-22 03:52:59,115 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:59,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 03:52:59,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:52:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 03:52:59,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:52:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 03:52:59,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:52:59,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 03:52:59,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335739015] [2020-12-22 03:52:59,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 03:52:59,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:52:59,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 03:52:59,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 03:52:59,282 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 13 states. [2020-12-22 03:52:59,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:52:59,343 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-12-22 03:52:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 03:52:59,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-12-22 03:52:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:52:59,345 INFO L225 Difference]: With dead ends: 57 [2020-12-22 03:52:59,345 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 03:52:59,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 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 03:52:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 03:52:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 03:52:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 03:52:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-22 03:52:59,350 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2020-12-22 03:52:59,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:52:59,350 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-22 03:52:59,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 03:52:59,350 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-22 03:52:59,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 03:52:59,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:52:59,351 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:52:59,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:52:59,565 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:52:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:52:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1546516264, now seen corresponding path program 9 times [2020-12-22 03:52:59,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:52:59,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785687086] [2020-12-22 03:52:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:52:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 03:53:00,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785687086] [2020-12-22 03:53:00,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906354122] [2020-12-22 03:53:00,848 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:01,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 03:53:01,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:01,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 03:53:01,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:01,509 INFO L348 Elim1Store]: treesize reduction 35, result has 7.9 percent of original size [2020-12-22 03:53:01,510 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 12 [2020-12-22 03:53:01,512 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:53:01,514 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:53:01,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:53:01,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:5 [2020-12-22 03:53:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 03:53:01,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:01,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2020-12-22 03:53:01,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962993055] [2020-12-22 03:53:01,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 03:53:01,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:01,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 03:53:01,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-12-22 03:53:01,550 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 24 states. [2020-12-22 03:53:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:02,669 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2020-12-22 03:53:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 03:53:02,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2020-12-22 03:53:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:02,670 INFO L225 Difference]: With dead ends: 55 [2020-12-22 03:53:02,670 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 03:53:02,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=389, Invalid=1333, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 03:53:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 03:53:02,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 03:53:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 03:53:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-22 03:53:02,678 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 39 [2020-12-22 03:53:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:02,679 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-22 03:53:02,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 03:53:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-22 03:53:02,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 03:53:02,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:02,680 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:02,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 03:53:02,881 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1353202673, now seen corresponding path program 10 times [2020-12-22 03:53:02,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:02,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372733002] [2020-12-22 03:53:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 03:53:03,889 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2020-12-22 03:53:04,114 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 36 [2020-12-22 03:53:04,799 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 03:53:04,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372733002] [2020-12-22 03:53:04,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690769163] [2020-12-22 03:53:04,800 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 03:53:04,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 03:53:04,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 03:53:04,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 03:53:04,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 03:53:05,023 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-22 03:53:05,025 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 03:53:05,027 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 03:53:05,027 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 03:53:05,027 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-12-22 03:53:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 03:53:05,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 03:53:05,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 23 [2020-12-22 03:53:05,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802062240] [2020-12-22 03:53:05,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 03:53:05,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 03:53:05,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 03:53:05,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-12-22 03:53:05,038 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 23 states. [2020-12-22 03:53:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 03:53:05,771 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-12-22 03:53:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 03:53:05,772 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-12-22 03:53:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 03:53:05,772 INFO L225 Difference]: With dead ends: 57 [2020-12-22 03:53:05,773 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 03:53:05,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 03:53:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 03:53:05,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 03:53:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 03:53:05,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-22 03:53:05,781 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2020-12-22 03:53:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 03:53:05,781 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-22 03:53:05,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 03:53:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-22 03:53:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 03:53:05,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 03:53:05,782 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 03:53:05,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 03:53:05,996 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 03:53:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 03:53:05,997 INFO L82 PathProgramCache]: Analyzing trace with hash 562473782, now seen corresponding path program 11 times [2020-12-22 03:53:05,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 03:53:05,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041021506] [2020-12-22 03:53:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 03:53:06,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:53:06,056 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:53:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 03:53:06,118 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 03:53:06,169 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 03:53:06,170 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 03:53:06,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 03:53:06,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 03:53:06 BoogieIcfgContainer [2020-12-22 03:53:06,259 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 03:53:06,259 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 03:53:06,259 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 03:53:06,260 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 03:53:06,260 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 03:52:50" (3/4) ... [2020-12-22 03:53:06,264 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 03:53:06,345 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/ldv-regression/test25-1.c-witness.graphml [2020-12-22 03:53:06,345 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 03:53:06,349 INFO L168 Benchmark]: Toolchain (without parser) took 16827.18 ms. Allocated memory was 176.2 MB in the beginning and 297.8 MB in the end (delta: 121.6 MB). Free memory was 150.8 MB in the beginning and 192.6 MB in the end (delta: -41.8 MB). Peak memory consumption was 81.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:06,350 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 176.2 MB. Free memory is still 147.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 03:53:06,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.44 ms. Allocated memory is still 176.2 MB. Free memory was 150.5 MB in the beginning and 140.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:06,350 INFO L168 Benchmark]: Boogie Procedure Inliner took 68.37 ms. Allocated memory is still 176.2 MB. Free memory was 140.5 MB in the beginning and 139.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:06,351 INFO L168 Benchmark]: Boogie Preprocessor took 59.68 ms. Allocated memory is still 176.2 MB. Free memory was 138.8 MB in the beginning and 137.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:06,351 INFO L168 Benchmark]: RCFGBuilder took 468.41 ms. Allocated memory is still 176.2 MB. Free memory was 137.5 MB in the beginning and 121.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:06,352 INFO L168 Benchmark]: TraceAbstraction took 15725.24 ms. Allocated memory was 176.2 MB in the beginning and 297.8 MB in the end (delta: 121.6 MB). Free memory was 158.1 MB in the beginning and 197.4 MB in the end (delta: -39.2 MB). Peak memory consumption was 82.1 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:06,355 INFO L168 Benchmark]: Witness Printer took 85.89 ms. Allocated memory is still 297.8 MB. Free memory was 197.4 MB in the beginning and 192.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-22 03:53:06,358 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 176.2 MB. Free memory is still 147.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 364.44 ms. Allocated memory is still 176.2 MB. Free memory was 150.5 MB in the beginning and 140.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 68.37 ms. Allocated memory is still 176.2 MB. Free memory was 140.5 MB in the beginning and 139.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.68 ms. Allocated memory is still 176.2 MB. Free memory was 138.8 MB in the beginning and 137.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 468.41 ms. Allocated memory is still 176.2 MB. Free memory was 137.5 MB in the beginning and 121.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15725.24 ms. Allocated memory was 176.2 MB in the beginning and 297.8 MB in the end (delta: 121.6 MB). Free memory was 158.1 MB in the beginning and 197.4 MB in the end (delta: -39.2 MB). Peak memory consumption was 82.1 MB. Max. memory is 8.0 GB. * Witness Printer took 85.89 ms. Allocated memory is still 297.8 MB. Free memory was 197.4 MB in the beginning and 192.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 47]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] struct cont cont; [L22] struct dummy array[10]; [L23] int i, *pa; [L24] i = __VERIFIER_nondet_int() [L26] int j = 0; [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND TRUE j < 10 [L27] array[j].a = __VERIFIER_nondet_int() [L28] array[j].b = __VERIFIER_nondet_int() [L26] j++ [L26] COND FALSE !(j < 10) [L31] COND TRUE i >= 0 && i < 9 [L32] cont.array = &array[i] [L33] EXPR cont.array [L33] pa = &cont.array[0].b [L34] EXPR cont.array [L34] EXPR cont.array[0].b [L34] COND TRUE cont.array[0].b > 0 [L35] EXPR array[i].b [L35] i = array[i].b - 10 [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND TRUE i < *pa [L37] ++i [L36] EXPR \read(*pa) [L36] COND FALSE !(i < *pa) [L16] EXPR pc->array [L16] EXPR pc->array[1].b [L16] return pc->array[1].b == i; [L39] COND TRUE !check(&cont, i) [L47] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.5s, OverallIterations: 15, TraceHistogramMax: 11, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 158 SDtfs, 107 SDslu, 714 SDs, 0 SdLazy, 1020 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 487 GetRequests, 319 SyntacticMatches, 3 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=14, 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, 14 MinimizatonAttempts, 9 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 732 NumberOfCodeBlocks, 685 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 655 ConstructedInterpolants, 27 QuantifiedInterpolants, 103789 SizeOfPredicates, 61 NumberOfNonLiveVariables, 1664 ConjunctsInSsa, 140 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 467/1350 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...