/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 08:08:31,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 08:08:31,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 08:08:31,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 08:08:31,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 08:08:31,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 08:08:31,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 08:08:31,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 08:08:31,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 08:08:31,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 08:08:31,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 08:08:31,582 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 08:08:31,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 08:08:31,584 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 08:08:31,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 08:08:31,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 08:08:31,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 08:08:31,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 08:08:31,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 08:08:31,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 08:08:31,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 08:08:31,610 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 08:08:31,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 08:08:31,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 08:08:31,611 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 08:08:31,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 08:08:31,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 08:08:31,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 08:08:31,613 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 08:08:31,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 08:08:31,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:08:31,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 08:08:31,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 08:08:31,613 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 08:08:31,614 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 08:08:31,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 08:08:31,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 08:08:31,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 08:08:31,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 08:08:31,836 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 08:08:31,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2022-01-31 08:08:31,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb61caad/7a825f4ba6104106b89f73cc65565f0e/FLAGd467ecc50 [2022-01-31 08:08:32,257 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 08:08:32,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i [2022-01-31 08:08:32,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb61caad/7a825f4ba6104106b89f73cc65565f0e/FLAGd467ecc50 [2022-01-31 08:08:32,270 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6fb61caad/7a825f4ba6104106b89f73cc65565f0e [2022-01-31 08:08:32,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 08:08:32,273 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 08:08:32,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 08:08:32,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 08:08:32,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 08:08:32,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:08:32" (1/1) ... [2022-01-31 08:08:32,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f42111e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:32, skipping insertion in model container [2022-01-31 08:08:32,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 08:08:32" (1/1) ... [2022-01-31 08:08:32,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 08:08:32,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 08:08:32,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i[817,830] [2022-01-31 08:08:32,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:08:33,149 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 08:08:33,158 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_loop_dep.i[817,830] [2022-01-31 08:08:33,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 08:08:33,172 INFO L208 MainTranslator]: Completed translation [2022-01-31 08:08:33,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33 WrapperNode [2022-01-31 08:08:33,173 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 08:08:33,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 08:08:33,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 08:08:33,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 08:08:33,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,186 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 08:08:33,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 08:08:33,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 08:08:33,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 08:08:33,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 08:08:33,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:33,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 08:08:33,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 08:08:33,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 08:08:33,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 08:08:33,278 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 08:08:33,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 08:08:33,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 08:08:33,278 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 08:08:33,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 08:08:33,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 08:08:33,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 08:08:33,349 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 08:08:33,351 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 08:08:33,430 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 08:08:33,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 08:08:33,434 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 08:08:33,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:33 BoogieIcfgContainer [2022-01-31 08:08:33,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 08:08:33,436 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 08:08:33,436 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 08:08:33,449 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 08:08:33,451 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:33" (1/1) ... [2022-01-31 08:08:33,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:08:33 BasicIcfg [2022-01-31 08:08:33,461 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 08:08:33,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 08:08:33,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 08:08:33,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 08:08:33,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 08:08:32" (1/4) ... [2022-01-31 08:08:33,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69790131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:08:33, skipping insertion in model container [2022-01-31 08:08:33,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 08:08:33" (2/4) ... [2022-01-31 08:08:33,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69790131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 08:08:33, skipping insertion in model container [2022-01-31 08:08:33,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 08:08:33" (3/4) ... [2022-01-31 08:08:33,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69790131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 08:08:33, skipping insertion in model container [2022-01-31 08:08:33,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 08:08:33" (4/4) ... [2022-01-31 08:08:33,466 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.iJordan [2022-01-31 08:08:33,489 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 08:08:33,490 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 08:08:33,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 08:08:33,536 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 08:08:33,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 08:08:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:08:33,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:33,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:33,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:33,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:33,552 INFO L85 PathProgramCache]: Analyzing trace with hash 262659094, now seen corresponding path program 1 times [2022-01-31 08:08:33,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:33,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189064269] [2022-01-31 08:08:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:33,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:33,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:33,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:33,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189064269] [2022-01-31 08:08:33,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189064269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:08:33,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:08:33,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 08:08:33,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644639145] [2022-01-31 08:08:33,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:08:33,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 08:08:33,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:33,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 08:08:33,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:08:33,778 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:33,846 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-01-31 08:08:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 08:08:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:08:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:33,856 INFO L225 Difference]: With dead ends: 35 [2022-01-31 08:08:33,856 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:08:33,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 08:08:33,860 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:33,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:08:33,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:08:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-01-31 08:08:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 08:08:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-01-31 08:08:33,896 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-01-31 08:08:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:33,897 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-01-31 08:08:33,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-01-31 08:08:33,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 08:08:33,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:33,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:33,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 08:08:33,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:33,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1150162775, now seen corresponding path program 1 times [2022-01-31 08:08:33,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:33,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865840043] [2022-01-31 08:08:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:33,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:33,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:33,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:33,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865840043] [2022-01-31 08:08:33,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865840043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 08:08:33,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 08:08:33,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 08:08:33,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713630557] [2022-01-31 08:08:33,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 08:08:33,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 08:08:33,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:33,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 08:08:33,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 08:08:33,969 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:34,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:34,026 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-01-31 08:08:34,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 08:08:34,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 08:08:34,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:34,027 INFO L225 Difference]: With dead ends: 27 [2022-01-31 08:08:34,027 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 08:08:34,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 08:08:34,028 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:34,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 08:08:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 08:08:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-01-31 08:08:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 08:08:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-01-31 08:08:34,033 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2022-01-31 08:08:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:34,033 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-01-31 08:08:34,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-01-31 08:08:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 08:08:34,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:34,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:34,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 08:08:34,034 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 228558549, now seen corresponding path program 1 times [2022-01-31 08:08:34,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:34,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148424463] [2022-01-31 08:08:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:34,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:34,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:34,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:34,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148424463] [2022-01-31 08:08:34,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148424463] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:34,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249222539] [2022-01-31 08:08:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:34,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:34,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:34,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:34,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 08:08:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:34,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 08:08:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:34,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:34,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249222539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:34,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:34,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-31 08:08:34,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275013465] [2022-01-31 08:08:34,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:34,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 08:08:34,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:34,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 08:08:34,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 08:08:34,289 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:34,358 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-01-31 08:08:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 08:08:34,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 08:08:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:34,359 INFO L225 Difference]: With dead ends: 43 [2022-01-31 08:08:34,360 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 08:08:34,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 08:08:34,361 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:34,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 38 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 08:08:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-01-31 08:08:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 08:08:34,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 08:08:34,366 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 15 [2022-01-31 08:08:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:34,366 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 08:08:34,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 08:08:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 08:08:34,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:34,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:34,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:34,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:34,587 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:34,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:34,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1458050993, now seen corresponding path program 2 times [2022-01-31 08:08:34,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:34,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016978724] [2022-01-31 08:08:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:34,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:34,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:34,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016978724] [2022-01-31 08:08:34,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016978724] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:34,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577928919] [2022-01-31 08:08:34,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 08:08:34,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:34,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:34,688 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:34,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 08:08:34,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 08:08:34,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:34,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 08:08:34,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:34,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:34,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577928919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:34,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:34,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-01-31 08:08:34,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83077818] [2022-01-31 08:08:34,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:34,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 08:08:34,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:34,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 08:08:34,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 08:08:34,847 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:35,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:35,006 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2022-01-31 08:08:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 08:08:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-01-31 08:08:35,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:35,008 INFO L225 Difference]: With dead ends: 85 [2022-01-31 08:08:35,008 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 08:08:35,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 08:08:35,009 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:35,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 56 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 08:08:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 08:08:35,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-01-31 08:08:35,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 08:08:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-01-31 08:08:35,016 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 21 [2022-01-31 08:08:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:35,016 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-01-31 08:08:35,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-01-31 08:08:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 08:08:35,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:35,017 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:35,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:35,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 08:08:35,234 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:35,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1273249597, now seen corresponding path program 3 times [2022-01-31 08:08:35,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:35,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824833407] [2022-01-31 08:08:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:35,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:35,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:35,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824833407] [2022-01-31 08:08:35,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824833407] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440399491] [2022-01-31 08:08:35,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 08:08:35,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:35,387 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:35,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 08:08:35,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-31 08:08:35,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 08:08:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:35,518 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:35,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:35,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440399491] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:35,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:35,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2022-01-31 08:08:35,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548557526] [2022-01-31 08:08:35,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:35,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 08:08:35,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:35,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 08:08:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 08:08:35,733 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:36,013 INFO L93 Difference]: Finished difference Result 169 states and 202 transitions. [2022-01-31 08:08:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 08:08:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-01-31 08:08:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:36,015 INFO L225 Difference]: With dead ends: 169 [2022-01-31 08:08:36,015 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 08:08:36,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 08:08:36,016 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 240 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:36,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 74 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 08:08:36,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 08:08:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 117. [2022-01-31 08:08:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 08:08:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 130 transitions. [2022-01-31 08:08:36,024 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 130 transitions. Word has length 33 [2022-01-31 08:08:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:36,025 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 130 transitions. [2022-01-31 08:08:36,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:36,025 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 130 transitions. [2022-01-31 08:08:36,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 08:08:36,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:36,026 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:36,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:36,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:36,258 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:36,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1940306005, now seen corresponding path program 4 times [2022-01-31 08:08:36,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:36,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335760165] [2022-01-31 08:08:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:36,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:36,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:36,645 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:36,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335760165] [2022-01-31 08:08:36,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335760165] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:36,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853231016] [2022-01-31 08:08:36,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 08:08:36,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:36,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:36,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:36,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 08:08:36,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 08:08:36,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-31 08:08:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:36,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:08:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:37,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853231016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:08:37,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:08:37,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2022-01-31 08:08:37,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614403943] [2022-01-31 08:08:37,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:08:37,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 08:08:37,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:08:37,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 08:08:37,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 08:08:37,469 INFO L87 Difference]: Start difference. First operand 117 states and 130 transitions. Second operand has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:08:38,070 INFO L93 Difference]: Finished difference Result 337 states and 406 transitions. [2022-01-31 08:08:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 08:08:38,070 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 08:08:38,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:08:38,072 INFO L225 Difference]: With dead ends: 337 [2022-01-31 08:08:38,072 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 08:08:38,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 08:08:38,073 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 544 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 08:08:38,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 132 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 08:08:38,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 08:08:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 225. [2022-01-31 08:08:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 26 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 08:08:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 250 transitions. [2022-01-31 08:08:38,085 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 250 transitions. Word has length 57 [2022-01-31 08:08:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:08:38,086 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 250 transitions. [2022-01-31 08:08:38,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.06) internal successors, (103), 49 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:08:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 250 transitions. [2022-01-31 08:08:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 08:08:38,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:08:38,087 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:08:38,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 08:08:38,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:38,303 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:08:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:08:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -147346053, now seen corresponding path program 5 times [2022-01-31 08:08:38,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:08:38,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500713883] [2022-01-31 08:08:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:08:38,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:08:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:38,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:08:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:08:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:39,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:08:39,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500713883] [2022-01-31 08:08:39,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500713883] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:08:39,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884669395] [2022-01-31 08:08:39,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 08:08:39,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:08:39,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:08:39,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:08:39,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 08:08:59,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-31 08:08:59,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 08:08:59,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 08:08:59,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 08:08:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:08:59,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 08:09:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:09:01,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884669395] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 08:09:01,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 08:09:01,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 98 [2022-01-31 08:09:01,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140166082] [2022-01-31 08:09:01,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 08:09:01,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 08:09:01,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 08:09:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 08:09:01,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 08:09:01,616 INFO L87 Difference]: Start difference. First operand 225 states and 250 transitions. Second operand has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 08:09:03,647 INFO L93 Difference]: Finished difference Result 673 states and 814 transitions. [2022-01-31 08:09:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 08:09:03,648 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 08:09:03,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 08:09:03,650 INFO L225 Difference]: With dead ends: 673 [2022-01-31 08:09:03,650 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 08:09:03,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4756, Invalid=4946, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 08:09:03,652 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1310 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 950 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 08:09:03,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1404 Valid, 229 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [950 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 08:09:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 08:09:03,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 441. [2022-01-31 08:09:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 388 states have (on average 1.0077319587628866) internal successors, (391), 388 states have internal predecessors, (391), 50 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-01-31 08:09:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 490 transitions. [2022-01-31 08:09:03,671 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 490 transitions. Word has length 105 [2022-01-31 08:09:03,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 08:09:03,672 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 490 transitions. [2022-01-31 08:09:03,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0306122448979593) internal successors, (199), 97 states have internal predecessors, (199), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 08:09:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 490 transitions. [2022-01-31 08:09:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 08:09:03,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 08:09:03,673 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 08:09:03,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 08:09:03,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:09:03,899 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 08:09:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 08:09:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1726077211, now seen corresponding path program 6 times [2022-01-31 08:09:03,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 08:09:03,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677283545] [2022-01-31 08:09:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 08:09:03,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 08:09:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:06,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 08:09:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 08:09:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 08:09:06,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 08:09:06,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677283545] [2022-01-31 08:09:06,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677283545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 08:09:06,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64723692] [2022-01-31 08:09:06,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 08:09:06,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 08:09:06,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 08:09:06,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 08:09:06,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process