/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:20:40,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:20:40,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:20:40,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 22:20:40,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 22:20:40,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 22:20:40,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 22:20:40,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 22:20:40,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 22:20:40,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 22:20:40,904 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 22:20:40,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-01-09 22:20:40,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:20:40,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:20:40,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:20:40,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:20:40,960 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:20:40,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:20:40,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:20:40,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:20:40,961 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:20:40,961 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:20:40,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:20:40,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:20:40,962 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:20:40,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:20:40,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:20:40,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:20:40,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:20:40,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:20:40,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:20:40,963 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:20:40,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:20:40,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:20:40,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:20:40,963 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:20:40,963 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:20:40,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:20:40,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:20:40,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:20:40,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:20:40,964 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:20:40,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:20:40,964 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:20:40,965 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:20:40,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:20:40,965 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:20:41,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:20:41,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:20:41,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:20:41,153 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:20:41,153 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:20:41,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2022-01-09 22:20:41,196 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ee61ba42/655820ae69574384a482435fd4a21c29/FLAG523e0e149 [2022-01-09 22:20:41,555 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:20:41,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2022-01-09 22:20:41,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ee61ba42/655820ae69574384a482435fd4a21c29/FLAG523e0e149 [2022-01-09 22:20:41,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ee61ba42/655820ae69574384a482435fd4a21c29 [2022-01-09 22:20:41,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:20:41,999 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:20:42,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:20:42,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:20:42,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:20:42,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:20:41" (1/1) ... [2022-01-09 22:20:42,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671cac36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42, skipping insertion in model container [2022-01-09 22:20:42,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:20:41" (1/1) ... [2022-01-09 22:20:42,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:20:42,019 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:20:42,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c[321,334] [2022-01-09 22:20:42,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:20:42,156 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:20:42,164 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c[321,334] [2022-01-09 22:20:42,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:20:42,179 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:20:42,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42 WrapperNode [2022-01-09 22:20:42,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:20:42,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:20:42,181 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:20:42,181 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:20:42,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,201 INFO L137 Inliner]: procedures = 13, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-01-09 22:20:42,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:20:42,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:20:42,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:20:42,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:20:42,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,207 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:20:42,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:20:42,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:20:42,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:20:42,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (1/1) ... [2022-01-09 22:20:42,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:20:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:42,257 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) [2022-01-09 22:20:42,290 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 [2022-01-09 22:20:42,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:20:42,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:20:42,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 22:20:42,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 22:20:42,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:20:42,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:20:42,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 22:20:42,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 22:20:42,357 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:20:42,358 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:20:42,463 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:20:42,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:20:42,468 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 22:20:42,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:20:42 BoogieIcfgContainer [2022-01-09 22:20:42,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:20:42,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:20:42,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:20:42,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:20:42,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:20:41" (1/3) ... [2022-01-09 22:20:42,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6881a006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:20:42, skipping insertion in model container [2022-01-09 22:20:42,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:20:42" (2/3) ... [2022-01-09 22:20:42,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6881a006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:20:42, skipping insertion in model container [2022-01-09 22:20:42,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:20:42" (3/3) ... [2022-01-09 22:20:42,476 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2022-01-09 22:20:42,480 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:20:42,480 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:20:42,512 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:20:42,516 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2022-01-09 22:20:42,517 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:20:42,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-09 22:20:42,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:42,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-09 22:20:42,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:42,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2022-01-09 22:20:42,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:42,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498956325] [2022-01-09 22:20:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:42,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:42,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:42,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498956325] [2022-01-09 22:20:42,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498956325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:20:42,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:20:42,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:20:42,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260323137] [2022-01-09 22:20:42,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:20:42,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 22:20:42,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:42,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 22:20:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:20:42,766 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:42,793 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-01-09 22:20:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 22:20:42,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-09 22:20:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:42,800 INFO L225 Difference]: With dead ends: 22 [2022-01-09 22:20:42,801 INFO L226 Difference]: Without dead ends: 10 [2022-01-09 22:20:42,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-09 22:20:42,805 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:42,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-09 22:20:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-01-09 22:20:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-01-09 22:20:42,834 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-01-09 22:20:42,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:42,834 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-01-09 22:20:42,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-01-09 22:20:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 22:20:42,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:42,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:42,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:20:42,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:42,839 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2022-01-09 22:20:42,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:42,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275385222] [2022-01-09 22:20:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:42,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:42,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:42,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275385222] [2022-01-09 22:20:42,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275385222] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:42,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134051369] [2022-01-09 22:20:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:42,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:42,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:42,950 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) [2022-01-09 22:20:42,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:20:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 22:20:42,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:43,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:43,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134051369] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:43,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:43,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-09 22:20:43,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487470754] [2022-01-09 22:20:43,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:43,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-09 22:20:43,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-09 22:20:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:20:43,065 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:43,110 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-01-09 22:20:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:20:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-09 22:20:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:43,112 INFO L225 Difference]: With dead ends: 19 [2022-01-09 22:20:43,112 INFO L226 Difference]: Without dead ends: 15 [2022-01-09 22:20:43,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-09 22:20:43,114 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:43,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-01-09 22:20:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-01-09 22:20:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-01-09 22:20:43,117 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-01-09 22:20:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:43,117 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-01-09 22:20:43,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-01-09 22:20:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-09 22:20:43,118 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:43,118 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:43,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:43,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:43,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:43,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 2 times [2022-01-09 22:20:43,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:43,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44463102] [2022-01-09 22:20:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:43,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:43,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:43,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44463102] [2022-01-09 22:20:43,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44463102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:43,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084918574] [2022-01-09 22:20:43,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:20:43,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:43,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:43,441 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) [2022-01-09 22:20:43,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:20:43,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:20:43,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:20:43,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 22:20:43,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:43,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:43,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084918574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:43,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:43,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-09 22:20:43,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199970932] [2022-01-09 22:20:43,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:43,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-09 22:20:43,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-09 22:20:43,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:20:43,602 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:43,639 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-01-09 22:20:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-09 22:20:43,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-09 22:20:43,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:43,640 INFO L225 Difference]: With dead ends: 31 [2022-01-09 22:20:43,640 INFO L226 Difference]: Without dead ends: 27 [2022-01-09 22:20:43,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:20:43,642 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:43,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 14 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-09 22:20:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-09 22:20:43,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-01-09 22:20:43,647 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-01-09 22:20:43,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:43,647 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-01-09 22:20:43,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:43,647 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-01-09 22:20:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-09 22:20:43,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:43,648 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:43,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:43,866 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,SelfDestructingSolverStorable2 [2022-01-09 22:20:43,866 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:43,867 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 3 times [2022-01-09 22:20:43,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:43,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216509325] [2022-01-09 22:20:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:43,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:44,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:44,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216509325] [2022-01-09 22:20:44,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216509325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:44,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376986472] [2022-01-09 22:20:44,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:20:44,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:44,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:44,049 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) [2022-01-09 22:20:44,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:20:44,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-09 22:20:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:20:44,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-09 22:20:44,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:44,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:44,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376986472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:44,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:44,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-01-09 22:20:44,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345714259] [2022-01-09 22:20:44,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:44,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-09 22:20:44,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-09 22:20:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-09 22:20:44,421 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:44,472 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-01-09 22:20:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-09 22:20:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-09 22:20:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:44,473 INFO L225 Difference]: With dead ends: 55 [2022-01-09 22:20:44,473 INFO L226 Difference]: Without dead ends: 51 [2022-01-09 22:20:44,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-09 22:20:44,474 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:44,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 18 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:20:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-09 22:20:44,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-09 22:20:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-01-09 22:20:44,480 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-01-09 22:20:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:44,480 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-01-09 22:20:44,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-01-09 22:20:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-09 22:20:44,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:44,482 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:44,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:44,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:44,699 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 4 times [2022-01-09 22:20:44,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:44,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048459970] [2022-01-09 22:20:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:44,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:45,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:45,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048459970] [2022-01-09 22:20:45,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048459970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:45,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702000299] [2022-01-09 22:20:45,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:20:45,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:45,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:45,025 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) [2022-01-09 22:20:45,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:20:45,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:20:45,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:20:45,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-09 22:20:45,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:45,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:45,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702000299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:45,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:45,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-01-09 22:20:45,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669006007] [2022-01-09 22:20:45,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:45,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-09 22:20:45,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:45,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-09 22:20:45,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-01-09 22:20:45,963 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:46,072 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-01-09 22:20:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-09 22:20:46,073 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-01-09 22:20:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:46,074 INFO L225 Difference]: With dead ends: 103 [2022-01-09 22:20:46,074 INFO L226 Difference]: Without dead ends: 99 [2022-01-09 22:20:46,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-01-09 22:20:46,075 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 69 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:46,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 30 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:20:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-09 22:20:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-01-09 22:20:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-01-09 22:20:46,092 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-01-09 22:20:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:46,092 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-01-09 22:20:46,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-01-09 22:20:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-09 22:20:46,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:46,094 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:46,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:46,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:46,311 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:46,312 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 5 times [2022-01-09 22:20:46,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:46,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515572223] [2022-01-09 22:20:46,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:46,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:46,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:47,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515572223] [2022-01-09 22:20:47,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515572223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695637299] [2022-01-09 22:20:47,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 22:20:47,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:47,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:47,149 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) [2022-01-09 22:20:47,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:20:54,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-09 22:20:54,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:20:54,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-09 22:20:54,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:20:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:55,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:20:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:57,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695637299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:20:57,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 22:20:57,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-01-09 22:20:57,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663681798] [2022-01-09 22:20:57,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 22:20:57,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-09 22:20:57,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:20:57,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-09 22:20:57,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-01-09 22:20:57,122 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:20:57,392 INFO L93 Difference]: Finished difference Result 199 states and 246 transitions. [2022-01-09 22:20:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-09 22:20:57,392 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-01-09 22:20:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:20:57,397 INFO L225 Difference]: With dead ends: 199 [2022-01-09 22:20:57,397 INFO L226 Difference]: Without dead ends: 195 [2022-01-09 22:20:57,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-01-09 22:20:57,400 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:20:57,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 30 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:20:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-09 22:20:57,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-01-09 22:20:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-01-09 22:20:57,419 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-01-09 22:20:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:20:57,419 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-01-09 22:20:57,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:20:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-01-09 22:20:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-09 22:20:57,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:20:57,421 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2022-01-09 22:20:57,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:20:57,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:57,624 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:20:57,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:20:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 6 times [2022-01-09 22:20:57,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:20:57,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433226848] [2022-01-09 22:20:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:20:57,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:20:57,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:20:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:20:59,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:20:59,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433226848] [2022-01-09 22:20:59,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433226848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:20:59,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263010270] [2022-01-09 22:20:59,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 22:20:59,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:20:59,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:20:59,984 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) [2022-01-09 22:20:59,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process