/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/recursive/gcd02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:15:23,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:15:23,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:15:23,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:15:23,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:15:23,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:15:23,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:15:23,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:15:23,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:15:23,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:15:23,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:15:23,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:15:23,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:15:23,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:15:23,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:15:23,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:15:23,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:15:23,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:15:23,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:15:23,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:15:23,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:15:23,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:15:23,655 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:15:23,656 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:15:23,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:15:23,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:15:23,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:15:23,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:15:23,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:15:23,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:15:23,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:15:23,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:15:23,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:15:23,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:15:23,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:15:23,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:15:23,673 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:15:23,726 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:15:23,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:15:23,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:15:23,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:15:23,729 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:15:23,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:15:23,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:15:23,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:15:23,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:15:23,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:15:23,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:15:23,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:15:23,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:15:23,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:15:23,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:15:23,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:15:23,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:15:23,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:15:23,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:15:23,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:15:23,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:15:23,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:15:23,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:15:23,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:15:23,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:15:23,735 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:15:24,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:15:24,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:15:24,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:15:24,120 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:15:24,121 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:15:24,122 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2021-01-06 19:15:24,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b6bb4b95/95cfca604f544792a7ae14ca2d8ed5ea/FLAG0a4b9b205 [2021-01-06 19:15:24,809 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:15:24,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2021-01-06 19:15:24,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b6bb4b95/95cfca604f544792a7ae14ca2d8ed5ea/FLAG0a4b9b205 [2021-01-06 19:15:25,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b6bb4b95/95cfca604f544792a7ae14ca2d8ed5ea [2021-01-06 19:15:25,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:15:25,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:15:25,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:15:25,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:15:25,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:15:25,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d6d0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25, skipping insertion in model container [2021-01-06 19:15:25,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:15:25,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:15:25,344 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[623,636] [2021-01-06 19:15:25,357 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2021-01-06 19:15:25,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:15:25,368 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:15:25,382 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[623,636] [2021-01-06 19:15:25,388 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c[1283,1296] [2021-01-06 19:15:25,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:15:25,404 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:15:25,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25 WrapperNode [2021-01-06 19:15:25,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:15:25,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:15:25,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:15:25,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:15:25,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:15:25,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:15:25,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:15:25,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:15:25,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... [2021-01-06 19:15:25,476 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:15:25,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:15:25,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:15:25,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:15:25,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2021-01-06 19:15:25,565 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2021-01-06 19:15:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:15:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:15:25,565 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2021-01-06 19:15:25,566 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2021-01-06 19:15:25,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:15:25,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:15:25,884 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:15:25,885 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:15:25,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:15:25 BoogieIcfgContainer [2021-01-06 19:15:25,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:15:25,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:15:25,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:15:25,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:15:25,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:15:25" (1/3) ... [2021-01-06 19:15:25,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8f17e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:15:25, skipping insertion in model container [2021-01-06 19:15:25,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:25" (2/3) ... [2021-01-06 19:15:25,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c8f17e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:15:25, skipping insertion in model container [2021-01-06 19:15:25,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:15:25" (3/3) ... [2021-01-06 19:15:25,898 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2021-01-06 19:15:25,906 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:15:25,911 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-01-06 19:15:25,934 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-01-06 19:15:25,964 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:15:25,964 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:15:25,964 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:15:25,964 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:15:25,965 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:15:25,965 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:15:25,965 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:15:25,965 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:15:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2021-01-06 19:15:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 19:15:25,998 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:25,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:26,001 INFO L429 AbstractCegarLoop]: === Iteration 1 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:26,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1041004109, now seen corresponding path program 1 times [2021-01-06 19:15:26,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:26,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846713518] [2021-01-06 19:15:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:15:26,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846713518] [2021-01-06 19:15:26,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:15:26,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:15:26,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768020838] [2021-01-06 19:15:26,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:15:26,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:15:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:15:26,440 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 6 states. [2021-01-06 19:15:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:26,593 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-01-06 19:15:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:15:26,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 19:15:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:26,605 INFO L225 Difference]: With dead ends: 78 [2021-01-06 19:15:26,605 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 19:15:26,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:15:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 19:15:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-01-06 19:15:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 19:15:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-01-06 19:15:26,672 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 9 [2021-01-06 19:15:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:26,673 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-01-06 19:15:26,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:15:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-01-06 19:15:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 19:15:26,674 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:26,674 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:26,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:15:26,675 INFO L429 AbstractCegarLoop]: === Iteration 2 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:26,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1602001293, now seen corresponding path program 1 times [2021-01-06 19:15:26,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:26,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118640081] [2021-01-06 19:15:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:15:26,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118640081] [2021-01-06 19:15:26,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:15:26,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 19:15:26,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490765440] [2021-01-06 19:15:26,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:15:26,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:26,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:15:26,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:15:26,817 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 8 states. [2021-01-06 19:15:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:27,003 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-01-06 19:15:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 19:15:27,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2021-01-06 19:15:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:27,011 INFO L225 Difference]: With dead ends: 59 [2021-01-06 19:15:27,011 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 19:15:27,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:15:27,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 19:15:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2021-01-06 19:15:27,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 19:15:27,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-01-06 19:15:27,048 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 14 [2021-01-06 19:15:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:27,050 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-01-06 19:15:27,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:15:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-01-06 19:15:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 19:15:27,051 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:27,054 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:27,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:15:27,054 INFO L429 AbstractCegarLoop]: === Iteration 3 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:27,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1599171148, now seen corresponding path program 1 times [2021-01-06 19:15:27,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:27,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601533561] [2021-01-06 19:15:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:15:27,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601533561] [2021-01-06 19:15:27,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:15:27,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 19:15:27,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456212871] [2021-01-06 19:15:27,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:15:27,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:15:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:15:27,186 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 9 states. [2021-01-06 19:15:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:27,420 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-01-06 19:15:27,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:15:27,420 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-01-06 19:15:27,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:27,423 INFO L225 Difference]: With dead ends: 63 [2021-01-06 19:15:27,423 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 19:15:27,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:15:27,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 19:15:27,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2021-01-06 19:15:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 19:15:27,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-01-06 19:15:27,438 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 14 [2021-01-06 19:15:27,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:27,438 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-01-06 19:15:27,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:15:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-01-06 19:15:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 19:15:27,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:27,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:27,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 19:15:27,441 INFO L429 AbstractCegarLoop]: === Iteration 4 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash -2110562560, now seen corresponding path program 1 times [2021-01-06 19:15:27,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:27,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963982566] [2021-01-06 19:15:27,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-01-06 19:15:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:15:27,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963982566] [2021-01-06 19:15:27,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:15:27,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:15:27,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236142791] [2021-01-06 19:15:27,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:15:27,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:15:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:15:27,518 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 5 states. [2021-01-06 19:15:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:27,566 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-01-06 19:15:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:15:27,567 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2021-01-06 19:15:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:27,569 INFO L225 Difference]: With dead ends: 55 [2021-01-06 19:15:27,569 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 19:15:27,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:15:27,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 19:15:27,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 19:15:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 19:15:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2021-01-06 19:15:27,579 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2021-01-06 19:15:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:27,580 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2021-01-06 19:15:27,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:15:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2021-01-06 19:15:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 19:15:27,582 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:27,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:27,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:15:27,583 INFO L429 AbstractCegarLoop]: === Iteration 5 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:27,583 INFO L82 PathProgramCache]: Analyzing trace with hash -291106652, now seen corresponding path program 1 times [2021-01-06 19:15:27,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:27,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400784381] [2021-01-06 19:15:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-01-06 19:15:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:15:27,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400784381] [2021-01-06 19:15:27,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:15:27,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 19:15:27,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274903637] [2021-01-06 19:15:27,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:15:27,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:27,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:15:27,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:15:27,680 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 8 states. [2021-01-06 19:15:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:27,817 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2021-01-06 19:15:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 19:15:27,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-06 19:15:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:27,824 INFO L225 Difference]: With dead ends: 69 [2021-01-06 19:15:27,825 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 19:15:27,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:15:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 19:15:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-01-06 19:15:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 19:15:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-01-06 19:15:27,839 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 21 [2021-01-06 19:15:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:27,839 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-01-06 19:15:27,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:15:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-01-06 19:15:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 19:15:27,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:27,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:27,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 19:15:27,842 INFO L429 AbstractCegarLoop]: === Iteration 6 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:27,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:27,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1709846180, now seen corresponding path program 1 times [2021-01-06 19:15:27,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:27,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864783606] [2021-01-06 19:15:27,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-01-06 19:15:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 19:15:27,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864783606] [2021-01-06 19:15:27,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:15:27,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:15:27,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664755066] [2021-01-06 19:15:27,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:15:27,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:27,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:15:27,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:15:27,942 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 5 states. [2021-01-06 19:15:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:27,964 INFO L93 Difference]: Finished difference Result 64 states and 79 transitions. [2021-01-06 19:15:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:15:27,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 19:15:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:27,970 INFO L225 Difference]: With dead ends: 64 [2021-01-06 19:15:27,971 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 19:15:27,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:15:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 19:15:27,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-01-06 19:15:27,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 19:15:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-01-06 19:15:27,989 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-01-06 19:15:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:27,989 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-01-06 19:15:27,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:15:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-01-06 19:15:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 19:15:27,991 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:27,991 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:27,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 19:15:27,991 INFO L429 AbstractCegarLoop]: === Iteration 7 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1148028586, now seen corresponding path program 1 times [2021-01-06 19:15:27,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:27,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759525715] [2021-01-06 19:15:27,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-01-06 19:15:28,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 19:15:28,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759525715] [2021-01-06 19:15:28,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583767539] [2021-01-06 19:15:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 19:15:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 19:15:28,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:28,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 19:15:28,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120844581] [2021-01-06 19:15:28,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:15:28,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:28,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:15:28,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:15:28,312 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 11 states. [2021-01-06 19:15:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:28,471 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2021-01-06 19:15:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:15:28,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2021-01-06 19:15:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:28,472 INFO L225 Difference]: With dead ends: 63 [2021-01-06 19:15:28,472 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 19:15:28,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:15:28,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 19:15:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-01-06 19:15:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 19:15:28,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-01-06 19:15:28,493 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 28 [2021-01-06 19:15:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:28,493 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-01-06 19:15:28,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:15:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-01-06 19:15:28,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 19:15:28,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:28,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:28,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 19:15:28,698 INFO L429 AbstractCegarLoop]: === Iteration 8 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash -729806600, now seen corresponding path program 1 times [2021-01-06 19:15:28,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:28,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037402774] [2021-01-06 19:15:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-01-06 19:15:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:15:28,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037402774] [2021-01-06 19:15:28,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379559139] [2021-01-06 19:15:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:28,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 19:15:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:15:29,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:29,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-01-06 19:15:29,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220864284] [2021-01-06 19:15:29,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 19:15:29,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:29,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 19:15:29,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:15:29,202 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 14 states. [2021-01-06 19:15:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:29,453 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2021-01-06 19:15:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:15:29,454 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2021-01-06 19:15:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:29,457 INFO L225 Difference]: With dead ends: 74 [2021-01-06 19:15:29,458 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 19:15:29,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:15:29,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 19:15:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-01-06 19:15:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 19:15:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-01-06 19:15:29,488 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 29 [2021-01-06 19:15:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:29,489 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-01-06 19:15:29,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 19:15:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-01-06 19:15:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 19:15:29,493 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:29,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:29,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:29,695 INFO L429 AbstractCegarLoop]: === Iteration 9 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1241581992, now seen corresponding path program 1 times [2021-01-06 19:15:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:29,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863604257] [2021-01-06 19:15:29,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:29,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:29,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:29,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-01-06 19:15:29,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:29,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 19:15:29,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863604257] [2021-01-06 19:15:29,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:15:29,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-01-06 19:15:29,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864395444] [2021-01-06 19:15:29,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:15:29,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:29,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:15:29,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:15:29,823 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 9 states. [2021-01-06 19:15:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:29,971 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2021-01-06 19:15:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:15:29,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2021-01-06 19:15:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:29,973 INFO L225 Difference]: With dead ends: 80 [2021-01-06 19:15:29,973 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 19:15:29,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:15:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 19:15:29,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-01-06 19:15:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 19:15:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 79 transitions. [2021-01-06 19:15:29,983 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 79 transitions. Word has length 29 [2021-01-06 19:15:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:29,984 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 79 transitions. [2021-01-06 19:15:29,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:15:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 79 transitions. [2021-01-06 19:15:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 19:15:29,985 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:29,985 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:29,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 19:15:29,985 INFO L429 AbstractCegarLoop]: === Iteration 10 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:29,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2029271682, now seen corresponding path program 1 times [2021-01-06 19:15:29,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:29,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944484402] [2021-01-06 19:15:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:30,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:30,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-01-06 19:15:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:30,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 19:15:30,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944484402] [2021-01-06 19:15:30,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686047498] [2021-01-06 19:15:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:30,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 19:15:30,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 19:15:30,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:30,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-01-06 19:15:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775004949] [2021-01-06 19:15:30,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 19:15:30,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 19:15:30,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:15:30,490 INFO L87 Difference]: Start difference. First operand 63 states and 79 transitions. Second operand 16 states. [2021-01-06 19:15:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:30,765 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2021-01-06 19:15:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:15:30,766 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2021-01-06 19:15:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:30,768 INFO L225 Difference]: With dead ends: 89 [2021-01-06 19:15:30,768 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 19:15:30,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-01-06 19:15:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 19:15:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-01-06 19:15:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 19:15:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2021-01-06 19:15:30,788 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 36 [2021-01-06 19:15:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:30,788 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2021-01-06 19:15:30,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 19:15:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2021-01-06 19:15:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 19:15:30,789 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:30,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:31,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 19:15:31,003 INFO L429 AbstractCegarLoop]: === Iteration 11 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash -122584798, now seen corresponding path program 1 times [2021-01-06 19:15:31,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:31,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328262802] [2021-01-06 19:15:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-01-06 19:15:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:15:31,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328262802] [2021-01-06 19:15:31,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666485189] [2021-01-06 19:15:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 19:15:31,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:15:31,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:31,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 19:15:31,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123596207] [2021-01-06 19:15:31,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:15:31,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:31,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:15:31,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:15:31,306 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 12 states. [2021-01-06 19:15:31,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:31,461 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-01-06 19:15:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:15:31,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2021-01-06 19:15:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:31,463 INFO L225 Difference]: With dead ends: 84 [2021-01-06 19:15:31,463 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 19:15:31,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:15:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 19:15:31,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-01-06 19:15:31,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 19:15:31,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-01-06 19:15:31,479 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 36 [2021-01-06 19:15:31,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:31,479 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-01-06 19:15:31,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:15:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-01-06 19:15:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 19:15:31,481 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:31,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:31,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:31,696 INFO L429 AbstractCegarLoop]: === Iteration 12 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1326914756, now seen corresponding path program 1 times [2021-01-06 19:15:31,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:31,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938874073] [2021-01-06 19:15:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-01-06 19:15:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 19:15:31,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938874073] [2021-01-06 19:15:31,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119301746] [2021-01-06 19:15:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:32,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:32,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 19:15:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 19:15:32,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:32,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-01-06 19:15:32,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628962665] [2021-01-06 19:15:32,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 19:15:32,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:32,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 19:15:32,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-01-06 19:15:32,452 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 30 states. [2021-01-06 19:15:33,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:33,173 INFO L93 Difference]: Finished difference Result 121 states and 159 transitions. [2021-01-06 19:15:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 19:15:33,174 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2021-01-06 19:15:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:33,176 INFO L225 Difference]: With dead ends: 121 [2021-01-06 19:15:33,176 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 19:15:33,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 19:15:33,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 19:15:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2021-01-06 19:15:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 19:15:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2021-01-06 19:15:33,203 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 37 [2021-01-06 19:15:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:33,204 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2021-01-06 19:15:33,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 19:15:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2021-01-06 19:15:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 19:15:33,205 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:33,208 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:33,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 19:15:33,421 INFO L429 AbstractCegarLoop]: === Iteration 13 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash -238590844, now seen corresponding path program 2 times [2021-01-06 19:15:33,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:33,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707905588] [2021-01-06 19:15:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:33,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:33,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:33,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:33,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-01-06 19:15:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 19:15:33,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707905588] [2021-01-06 19:15:33,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632515937] [2021-01-06 19:15:33,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:33,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:15:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:33,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:15:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 19:15:33,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:33,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-01-06 19:15:33,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660065318] [2021-01-06 19:15:33,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 19:15:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:33,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 19:15:33,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:15:33,860 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand 15 states. [2021-01-06 19:15:34,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:34,094 INFO L93 Difference]: Finished difference Result 112 states and 146 transitions. [2021-01-06 19:15:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 19:15:34,097 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2021-01-06 19:15:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:34,102 INFO L225 Difference]: With dead ends: 112 [2021-01-06 19:15:34,102 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 19:15:34,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:15:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 19:15:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 87. [2021-01-06 19:15:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 19:15:34,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2021-01-06 19:15:34,122 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 37 [2021-01-06 19:15:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:34,122 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2021-01-06 19:15:34,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 19:15:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2021-01-06 19:15:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 19:15:34,126 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:34,126 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:34,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:34,339 INFO L429 AbstractCegarLoop]: === Iteration 14 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash -124726374, now seen corresponding path program 2 times [2021-01-06 19:15:34,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:34,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157462848] [2021-01-06 19:15:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:34,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:34,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-01-06 19:15:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:34,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:34,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:15:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157462848] [2021-01-06 19:15:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613506701] [2021-01-06 19:15:34,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:34,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:15:34,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:34,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 19:15:34,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:15:34,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:34,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-01-06 19:15:34,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213760200] [2021-01-06 19:15:34,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 19:15:34,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:34,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 19:15:34,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:15:34,843 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand 18 states. [2021-01-06 19:15:35,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:35,216 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2021-01-06 19:15:35,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 19:15:35,217 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2021-01-06 19:15:35,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:35,218 INFO L225 Difference]: With dead ends: 97 [2021-01-06 19:15:35,218 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 19:15:35,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:15:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 19:15:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2021-01-06 19:15:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 19:15:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-01-06 19:15:35,228 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 43 [2021-01-06 19:15:35,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:35,228 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-01-06 19:15:35,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 19:15:35,228 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-01-06 19:15:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 19:15:35,229 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:35,229 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:35,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:15:35,445 INFO L429 AbstractCegarLoop]: === Iteration 15 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:35,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:35,446 INFO L82 PathProgramCache]: Analyzing trace with hash -183999432, now seen corresponding path program 3 times [2021-01-06 19:15:35,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:35,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689270880] [2021-01-06 19:15:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 19:15:35,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689270880] [2021-01-06 19:15:35,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924739216] [2021-01-06 19:15:35,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:35,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:15:35,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:35,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 19:15:35,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 19:15:36,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:36,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-01-06 19:15:36,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141579087] [2021-01-06 19:15:36,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 19:15:36,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:36,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 19:15:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2021-01-06 19:15:36,190 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 30 states. [2021-01-06 19:15:37,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:37,113 INFO L93 Difference]: Finished difference Result 124 states and 168 transitions. [2021-01-06 19:15:37,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 19:15:37,114 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 45 [2021-01-06 19:15:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:37,116 INFO L225 Difference]: With dead ends: 124 [2021-01-06 19:15:37,116 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 19:15:37,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 19:15:37,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 19:15:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 56. [2021-01-06 19:15:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 19:15:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2021-01-06 19:15:37,125 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 45 [2021-01-06 19:15:37,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:37,126 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2021-01-06 19:15:37,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 19:15:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2021-01-06 19:15:37,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 19:15:37,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:37,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:37,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 19:15:37,341 INFO L429 AbstractCegarLoop]: === Iteration 16 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:37,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:37,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1996237866, now seen corresponding path program 3 times [2021-01-06 19:15:37,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:37,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418404676] [2021-01-06 19:15:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:37,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:37,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:37,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-01-06 19:15:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:37,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:15:37,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418404676] [2021-01-06 19:15:37,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031502866] [2021-01-06 19:15:37,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:37,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 19:15:37,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 19:15:37,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:15:37,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:37,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-01-06 19:15:37,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680382980] [2021-01-06 19:15:37,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 19:15:37,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:37,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 19:15:37,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-01-06 19:15:37,990 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 25 states. [2021-01-06 19:15:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:38,619 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-01-06 19:15:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:15:38,620 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 44 [2021-01-06 19:15:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:38,622 INFO L225 Difference]: With dead ends: 86 [2021-01-06 19:15:38,622 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 19:15:38,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:15:38,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 19:15:38,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2021-01-06 19:15:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 19:15:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2021-01-06 19:15:38,630 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 44 [2021-01-06 19:15:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:38,631 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2021-01-06 19:15:38,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 19:15:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2021-01-06 19:15:38,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 19:15:38,632 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:38,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:38,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:15:38,844 INFO L429 AbstractCegarLoop]: === Iteration 17 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1270773450, now seen corresponding path program 1 times [2021-01-06 19:15:38,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:38,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349289018] [2021-01-06 19:15:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:38,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:38,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:38,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:39,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-01-06 19:15:39,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:39,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:15:39,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349289018] [2021-01-06 19:15:39,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714867673] [2021-01-06 19:15:39,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 19:15:39,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:15:39,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:39,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2021-01-06 19:15:39,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636896578] [2021-01-06 19:15:39,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 19:15:39,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:39,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 19:15:39,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-01-06 19:15:39,535 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand 27 states. [2021-01-06 19:15:40,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:40,364 INFO L93 Difference]: Finished difference Result 124 states and 162 transitions. [2021-01-06 19:15:40,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 19:15:40,365 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2021-01-06 19:15:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:40,366 INFO L225 Difference]: With dead ends: 124 [2021-01-06 19:15:40,367 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 19:15:40,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=1282, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 19:15:40,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 19:15:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 71. [2021-01-06 19:15:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 19:15:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2021-01-06 19:15:40,378 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 44 [2021-01-06 19:15:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:40,378 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2021-01-06 19:15:40,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 19:15:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2021-01-06 19:15:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 19:15:40,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:40,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:40,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 19:15:40,595 INFO L429 AbstractCegarLoop]: === Iteration 18 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:40,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash 132450678, now seen corresponding path program 2 times [2021-01-06 19:15:40,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:40,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24115513] [2021-01-06 19:15:40,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:40,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:40,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:40,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:40,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-01-06 19:15:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:40,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 19:15:40,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24115513] [2021-01-06 19:15:40,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665011564] [2021-01-06 19:15:40,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:40,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:15:40,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:40,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 19:15:40,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 19:15:41,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:41,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-01-06 19:15:41,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195163595] [2021-01-06 19:15:41,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:15:41,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:41,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:15:41,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:15:41,050 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand 17 states. [2021-01-06 19:15:41,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:41,426 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2021-01-06 19:15:41,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 19:15:41,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2021-01-06 19:15:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:41,428 INFO L225 Difference]: With dead ends: 99 [2021-01-06 19:15:41,428 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 19:15:41,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-01-06 19:15:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 19:15:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-01-06 19:15:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 19:15:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2021-01-06 19:15:41,436 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 44 [2021-01-06 19:15:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:41,437 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2021-01-06 19:15:41,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:15:41,437 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2021-01-06 19:15:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 19:15:41,438 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:41,438 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:41,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 19:15:41,653 INFO L429 AbstractCegarLoop]: === Iteration 19 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash 815065250, now seen corresponding path program 3 times [2021-01-06 19:15:41,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:41,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534240376] [2021-01-06 19:15:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:41,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:41,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:41,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:41,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:41,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:41,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:15:41,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534240376] [2021-01-06 19:15:41,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659534093] [2021-01-06 19:15:41,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:41,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:15:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:41,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 19:15:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 19:15:42,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:42,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-01-06 19:15:42,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816078496] [2021-01-06 19:15:42,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 19:15:42,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:42,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 19:15:42,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:15:42,481 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 28 states. [2021-01-06 19:15:43,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:43,422 INFO L93 Difference]: Finished difference Result 126 states and 164 transitions. [2021-01-06 19:15:43,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 19:15:43,423 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 52 [2021-01-06 19:15:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:43,424 INFO L225 Difference]: With dead ends: 126 [2021-01-06 19:15:43,424 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 19:15:43,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:15:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 19:15:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-01-06 19:15:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 19:15:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 112 transitions. [2021-01-06 19:15:43,435 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 112 transitions. Word has length 52 [2021-01-06 19:15:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:43,435 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 112 transitions. [2021-01-06 19:15:43,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 19:15:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 112 transitions. [2021-01-06 19:15:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 19:15:43,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:43,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:43,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:43,651 INFO L429 AbstractCegarLoop]: === Iteration 20 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:43,652 INFO L82 PathProgramCache]: Analyzing trace with hash 850048834, now seen corresponding path program 4 times [2021-01-06 19:15:43,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:43,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844801681] [2021-01-06 19:15:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:43,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:43,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:43,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:43,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:43,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:43,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:43,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:15:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844801681] [2021-01-06 19:15:43,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184465336] [2021-01-06 19:15:43,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:43,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:15:43,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 19:15:44,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:15:44,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:44,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-01-06 19:15:44,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563324931] [2021-01-06 19:15:44,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 19:15:44,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:44,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 19:15:44,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-01-06 19:15:44,456 INFO L87 Difference]: Start difference. First operand 86 states and 112 transitions. Second operand 29 states. [2021-01-06 19:15:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:45,451 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2021-01-06 19:15:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 19:15:45,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 52 [2021-01-06 19:15:45,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:45,456 INFO L225 Difference]: With dead ends: 127 [2021-01-06 19:15:45,456 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 19:15:45,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 19:15:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 19:15:45,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 59. [2021-01-06 19:15:45,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 19:15:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-01-06 19:15:45,464 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 52 [2021-01-06 19:15:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:45,464 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-01-06 19:15:45,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 19:15:45,465 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-01-06 19:15:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 19:15:45,465 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:45,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:45,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-01-06 19:15:45,679 INFO L429 AbstractCegarLoop]: === Iteration 21 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash 861262790, now seen corresponding path program 4 times [2021-01-06 19:15:45,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:45,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889587772] [2021-01-06 19:15:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:45,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:45,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:45,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:45,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-01-06 19:15:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:45,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:45,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:15:45,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889587772] [2021-01-06 19:15:45,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563866410] [2021-01-06 19:15:45,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:46,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:15:46,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 19:15:46,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:15:46,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:46,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-01-06 19:15:46,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490742720] [2021-01-06 19:15:46,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 19:15:46,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:46,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 19:15:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-01-06 19:15:46,310 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 21 states. [2021-01-06 19:15:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:46,718 INFO L93 Difference]: Finished difference Result 89 states and 111 transitions. [2021-01-06 19:15:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 19:15:46,718 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2021-01-06 19:15:46,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:46,720 INFO L225 Difference]: With dead ends: 89 [2021-01-06 19:15:46,720 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 19:15:46,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-01-06 19:15:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 19:15:46,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2021-01-06 19:15:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 19:15:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2021-01-06 19:15:46,728 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 51 [2021-01-06 19:15:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:46,728 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2021-01-06 19:15:46,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 19:15:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2021-01-06 19:15:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 19:15:46,729 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:46,729 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:46,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:46,938 INFO L429 AbstractCegarLoop]: === Iteration 22 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2103225754, now seen corresponding path program 5 times [2021-01-06 19:15:46,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:46,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940951375] [2021-01-06 19:15:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:46,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:47,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:47,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:47,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-01-06 19:15:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:47,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:47,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:15:47,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940951375] [2021-01-06 19:15:47,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976597667] [2021-01-06 19:15:47,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:47,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 19:15:47,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 19:15:47,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:15:47,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:47,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-01-06 19:15:47,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70186864] [2021-01-06 19:15:47,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 19:15:47,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:47,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 19:15:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-01-06 19:15:47,560 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 21 states. [2021-01-06 19:15:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:47,989 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2021-01-06 19:15:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 19:15:47,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 51 [2021-01-06 19:15:47,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:47,994 INFO L225 Difference]: With dead ends: 97 [2021-01-06 19:15:47,994 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 19:15:47,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-01-06 19:15:47,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 19:15:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2021-01-06 19:15:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 19:15:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2021-01-06 19:15:48,002 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 51 [2021-01-06 19:15:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:48,002 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2021-01-06 19:15:48,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 19:15:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2021-01-06 19:15:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 19:15:48,003 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:48,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:48,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 19:15:48,218 INFO L429 AbstractCegarLoop]: === Iteration 23 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:48,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:48,219 INFO L82 PathProgramCache]: Analyzing trace with hash -262469082, now seen corresponding path program 6 times [2021-01-06 19:15:48,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:48,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013273418] [2021-01-06 19:15:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:48,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:48,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:48,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:48,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-01-06 19:15:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:48,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:48,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 19:15:48,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013273418] [2021-01-06 19:15:48,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551116305] [2021-01-06 19:15:48,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:48,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 19:15:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:48,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 19:15:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 19:15:48,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:48,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-01-06 19:15:48,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918893636] [2021-01-06 19:15:48,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 19:15:48,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:48,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 19:15:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:15:48,895 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 26 states. [2021-01-06 19:15:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:49,488 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-01-06 19:15:49,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 19:15:49,490 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2021-01-06 19:15:49,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:49,491 INFO L225 Difference]: With dead ends: 91 [2021-01-06 19:15:49,491 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 19:15:49,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:15:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 19:15:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2021-01-06 19:15:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 19:15:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-01-06 19:15:49,498 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 51 [2021-01-06 19:15:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:49,499 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-01-06 19:15:49,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 19:15:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-01-06 19:15:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 19:15:49,500 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:49,500 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:49,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:49,715 INFO L429 AbstractCegarLoop]: === Iteration 24 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash 334535194, now seen corresponding path program 5 times [2021-01-06 19:15:49,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:49,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535675693] [2021-01-06 19:15:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:49,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:49,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:49,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:49,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:49,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:49,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:49,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:49,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:50,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 19:15:50,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535675693] [2021-01-06 19:15:50,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100624309] [2021-01-06 19:15:50,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:50,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 19:15:50,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:50,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 19:15:50,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 19:15:51,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:51,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-01-06 19:15:51,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141867648] [2021-01-06 19:15:51,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 19:15:51,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:51,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 19:15:51,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2021-01-06 19:15:51,795 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 31 states. [2021-01-06 19:15:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:53,137 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2021-01-06 19:15:53,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 19:15:53,139 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2021-01-06 19:15:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:53,140 INFO L225 Difference]: With dead ends: 106 [2021-01-06 19:15:53,140 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 19:15:53,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 19:15:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 19:15:53,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2021-01-06 19:15:53,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 19:15:53,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-01-06 19:15:53,149 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 59 [2021-01-06 19:15:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:53,149 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-01-06 19:15:53,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 19:15:53,149 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-01-06 19:15:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 19:15:53,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:53,150 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:53,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 19:15:53,360 INFO L429 AbstractCegarLoop]: === Iteration 25 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:53,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1972765050, now seen corresponding path program 7 times [2021-01-06 19:15:53,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:53,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5892503] [2021-01-06 19:15:53,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 19:15:53,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5892503] [2021-01-06 19:15:53,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782355383] [2021-01-06 19:15:53,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:53,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 19:15:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 19:15:54,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:54,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-01-06 19:15:54,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415002207] [2021-01-06 19:15:54,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 19:15:54,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 19:15:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:15:54,046 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 22 states. [2021-01-06 19:15:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:54,618 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2021-01-06 19:15:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:15:54,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2021-01-06 19:15:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:54,620 INFO L225 Difference]: With dead ends: 109 [2021-01-06 19:15:54,620 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 19:15:54,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-01-06 19:15:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 19:15:54,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2021-01-06 19:15:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 19:15:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-01-06 19:15:54,630 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2021-01-06 19:15:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:54,630 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-01-06 19:15:54,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 19:15:54,630 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-01-06 19:15:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 19:15:54,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:54,631 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:54,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 19:15:54,847 INFO L429 AbstractCegarLoop]: === Iteration 26 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:54,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 12091098, now seen corresponding path program 8 times [2021-01-06 19:15:54,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:54,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606187984] [2021-01-06 19:15:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:54,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:54,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:54,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:54,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:54,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:55,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:55,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 19:15:55,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606187984] [2021-01-06 19:15:55,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552745106] [2021-01-06 19:15:55,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:55,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:15:55,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:55,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 19:15:55,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:55,493 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 19:15:55,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:55,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-01-06 19:15:55,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999733706] [2021-01-06 19:15:55,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 19:15:55,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:55,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 19:15:55,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:15:55,494 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand 22 states. [2021-01-06 19:15:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:56,070 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2021-01-06 19:15:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:15:56,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 59 [2021-01-06 19:15:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:56,072 INFO L225 Difference]: With dead ends: 113 [2021-01-06 19:15:56,072 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 19:15:56,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 57 SyntacticMatches, 9 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-01-06 19:15:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 19:15:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2021-01-06 19:15:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 19:15:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2021-01-06 19:15:56,081 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 59 [2021-01-06 19:15:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:56,082 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2021-01-06 19:15:56,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 19:15:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2021-01-06 19:15:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 19:15:56,083 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:56,083 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:56,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 19:15:56,297 INFO L429 AbstractCegarLoop]: === Iteration 27 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:56,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1626138758, now seen corresponding path program 9 times [2021-01-06 19:15:56,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:56,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226157978] [2021-01-06 19:15:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:56,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:15:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:56,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:56,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:56,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:56,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:56,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:56,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 19:15:56,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226157978] [2021-01-06 19:15:56,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493850432] [2021-01-06 19:15:56,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:56,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:15:56,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:56,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 19:15:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:16:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-01-06 19:16:01,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:16:01,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2021-01-06 19:16:01,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838911800] [2021-01-06 19:16:01,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 19:16:01,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:16:01,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 19:16:01,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1034, Unknown=2, NotChecked=0, Total=1122 [2021-01-06 19:16:01,614 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand 34 states. [2021-01-06 19:16:03,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:16:03,715 INFO L93 Difference]: Finished difference Result 148 states and 195 transitions. [2021-01-06 19:16:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 19:16:03,716 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 59 [2021-01-06 19:16:03,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:16:03,718 INFO L225 Difference]: With dead ends: 148 [2021-01-06 19:16:03,718 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 19:16:03,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=208, Invalid=1860, Unknown=2, NotChecked=0, Total=2070 [2021-01-06 19:16:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 19:16:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 101. [2021-01-06 19:16:03,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 19:16:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2021-01-06 19:16:03,735 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 59 [2021-01-06 19:16:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:16:03,735 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2021-01-06 19:16:03,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 19:16:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2021-01-06 19:16:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 19:16:03,736 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:16:03,736 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:16:03,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 19:16:03,950 INFO L429 AbstractCegarLoop]: === Iteration 28 === [gcdErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:16:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:16:03,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1786558534, now seen corresponding path program 10 times [2021-01-06 19:16:03,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:16:03,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031324579] [2021-01-06 19:16:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:16:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:16:03,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-01-06 19:16:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:16:04,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:16:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:16:04,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:16:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:16:04,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:16:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:16:04,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:16:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:16:04,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:16:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:16:04,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:16:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:16:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-01-06 19:16:04,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031324579] [2021-01-06 19:16:04,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916270643] [2021-01-06 19:16:04,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:16:04,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:16:04,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:16:04,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 19:16:04,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:16:05,100 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:16:07,316 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1111 DAG size of output: 1111 [2021-01-06 19:16:08,345 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 1111 [2021-01-06 19:16:15,709 WARN L195 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-01-06 19:16:15,711 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2021-01-06 19:16:15,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 19:16:15,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 19:16:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728432376] [2021-01-06 19:16:15,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 19:16:15,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:16:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 19:16:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:16:15,712 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand 19 states. [2021-01-06 19:16:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 19:16:15,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 19:16:15,915 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@454cf90f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:62) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:131) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-01-06 19:16:15,922 INFO L168 Benchmark]: Toolchain (without parser) took 50759.73 ms. Allocated memory was 165.7 MB in the beginning and 373.3 MB in the end (delta: 207.6 MB). Free memory was 140.9 MB in the beginning and 344.0 MB in the end (delta: -203.1 MB). Peak memory consumption was 5.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:16:15,923 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 165.7 MB. Free memory was 141.1 MB in the beginning and 141.0 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:16:15,923 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.84 ms. Allocated memory is still 165.7 MB. Free memory was 140.6 MB in the beginning and 131.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:16:15,924 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.30 ms. Allocated memory is still 165.7 MB. Free memory was 131.0 MB in the beginning and 129.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:16:15,924 INFO L168 Benchmark]: Boogie Preprocessor took 33.53 ms. Allocated memory is still 165.7 MB. Free memory was 129.7 MB in the beginning and 128.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:16:15,925 INFO L168 Benchmark]: RCFGBuilder took 410.45 ms. Allocated memory is still 165.7 MB. Free memory was 128.7 MB in the beginning and 113.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-01-06 19:16:15,925 INFO L168 Benchmark]: TraceAbstraction took 50030.68 ms. Allocated memory was 165.7 MB in the beginning and 373.3 MB in the end (delta: 207.6 MB). Free memory was 113.0 MB in the beginning and 344.0 MB in the end (delta: -231.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:16:15,928 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 165.7 MB. Free memory was 141.1 MB in the beginning and 141.0 MB in the end (delta: 102.7 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 241.84 ms. Allocated memory is still 165.7 MB. Free memory was 140.6 MB in the beginning and 131.0 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 35.30 ms. Allocated memory is still 165.7 MB. Free memory was 131.0 MB in the beginning and 129.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.53 ms. Allocated memory is still 165.7 MB. Free memory was 129.7 MB in the beginning and 128.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 410.45 ms. Allocated memory is still 165.7 MB. Free memory was 128.7 MB in the beginning and 113.3 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 50030.68 ms. Allocated memory was 165.7 MB in the beginning and 373.3 MB in the end (delta: 207.6 MB). Free memory was 113.0 MB in the beginning and 344.0 MB in the end (delta: -231.0 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@454cf90f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@454cf90f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...