/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/array-crafted/bor4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:09:26,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:09:26,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:09:26,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:09:26,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:09:26,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:09:26,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:09:26,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:09:26,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:09:26,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:09:26,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:09:26,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:09:26,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:09:26,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:09:26,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:09:26,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:09:26,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:09:26,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:09:26,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:09:26,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:09:26,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:09:26,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:09:26,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:09:26,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:09:26,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-09 23:09:26,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:09:26,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:09:26,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:09:26,174 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 23:09:26,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:09:26,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:09:26,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:09:26,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:09:26,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:09:26,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:09:26,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:09:26,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:09:26,198 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:09:26,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:09:26,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:09:26,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:09:26,199 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:09:26,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:09:26,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:09:26,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:09:26,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:09:26,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:09:26,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:09:26,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:09:26,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:09:26,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:09:26,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:09:26,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:09:26,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:09:26,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:09:26,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:09:26,201 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:09:26,201 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:09:26,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:09:26,201 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:09:26,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:09:26,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:09:26,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:09:26,455 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:09:26,456 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:09:26,457 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor4.i [2022-01-09 23:09:26,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c9d28ff7/44c362e4cd8044adbe3d3e76e9cde64b/FLAGb675c0119 [2022-01-09 23:09:26,910 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:09:26,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor4.i [2022-01-09 23:09:26,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c9d28ff7/44c362e4cd8044adbe3d3e76e9cde64b/FLAGb675c0119 [2022-01-09 23:09:26,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c9d28ff7/44c362e4cd8044adbe3d3e76e9cde64b [2022-01-09 23:09:26,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:09:26,933 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:09:26,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:09:26,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:09:26,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:09:26,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:09:26" (1/1) ... [2022-01-09 23:09:26,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c5185f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:26, skipping insertion in model container [2022-01-09 23:09:26,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:09:26" (1/1) ... [2022-01-09 23:09:26,950 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:09:26,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:09:27,108 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-crafted/bor4.i[1303,1316] [2022-01-09 23:09:27,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:09:27,117 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:09:27,134 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-crafted/bor4.i[1303,1316] [2022-01-09 23:09:27,135 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:09:27,147 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:09:27,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27 WrapperNode [2022-01-09 23:09:27,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:09:27,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:09:27,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:09:27,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:09:27,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,180 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-01-09 23:09:27,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:09:27,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:09:27,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:09:27,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:09:27,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:09:27,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:09:27,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:09:27,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:09:27,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (1/1) ... [2022-01-09 23:09:27,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:09:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:27,241 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 23:09:27,266 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 23:09:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:09:27,284 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-01-09 23:09:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-01-09 23:09:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:09:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:09:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:09:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:09:27,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:09:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:09:27,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:09:27,367 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:09:27,369 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:09:27,476 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:09:27,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:09:27,481 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-09 23:09:27,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:09:27 BoogieIcfgContainer [2022-01-09 23:09:27,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:09:27,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:09:27,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:09:27,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:09:27,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:09:26" (1/3) ... [2022-01-09 23:09:27,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11398b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:09:27, skipping insertion in model container [2022-01-09 23:09:27,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:27" (2/3) ... [2022-01-09 23:09:27,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11398b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:09:27, skipping insertion in model container [2022-01-09 23:09:27,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:09:27" (3/3) ... [2022-01-09 23:09:27,494 INFO L111 eAbstractionObserver]: Analyzing ICFG bor4.i [2022-01-09 23:09:27,499 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:09:27,499 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:09:27,563 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:09:27,570 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 23:09:27,570 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:09:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:09:27,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:27,611 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:27,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-01-09 23:09:27,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:27,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779845955] [2022-01-09 23:09:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:27,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:27,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-09 23:09:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:27,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-09 23:09:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-09 23:09:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 23:09:27,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:27,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779845955] [2022-01-09 23:09:27,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779845955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:27,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617550252] [2022-01-09 23:09:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:27,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:27,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:27,862 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 23:09:27,880 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 23:09:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:27,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:09:27,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:09:28,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:09:28,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617550252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:09:28,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:09:28,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-09 23:09:28,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640161783] [2022-01-09 23:09:28,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:09:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:09:28,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:28,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:09:28,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:09:28,121 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:09:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:28,152 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-01-09 23:09:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:09:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-09 23:09:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:28,161 INFO L225 Difference]: With dead ends: 50 [2022-01-09 23:09:28,161 INFO L226 Difference]: Without dead ends: 24 [2022-01-09 23:09:28,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:09:28,168 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 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 23:09:28,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:28,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-09 23:09:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-09 23:09:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-09 23:09:28,210 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-01-09 23:09:28,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:28,210 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-09 23:09:28,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:09:28,212 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-09 23:09:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-09 23:09:28,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:28,216 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:28,245 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 23:09:28,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-09 23:09:28,435 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-01-09 23:09:28,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:28,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978014545] [2022-01-09 23:09:28,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:28,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:09:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:28,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-09 23:09:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:28,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-09 23:09:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:09:28,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:28,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978014545] [2022-01-09 23:09:28,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978014545] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:28,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103141723] [2022-01-09 23:09:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:28,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:28,546 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 23:09:28,547 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 23:09:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:09:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:09:28,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:09:28,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103141723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:09:28,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:09:28,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-09 23:09:28,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570128501] [2022-01-09 23:09:28,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:09:28,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:09:28,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:28,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:09:28,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:09:28,687 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:09:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:28,697 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-01-09 23:09:28,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:09:28,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-01-09 23:09:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:28,698 INFO L225 Difference]: With dead ends: 42 [2022-01-09 23:09:28,698 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 23:09:28,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:09:28,700 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 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 23:09:28,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 23:09:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-09 23:09:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:28,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-09 23:09:28,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-01-09 23:09:28,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:28,706 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-09 23:09:28,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:09:28,706 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-09 23:09:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-09 23:09:28,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:28,709 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:28,732 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 23:09:28,923 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,SelfDestructingSolverStorable1 [2022-01-09 23:09:28,924 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2022-01-09 23:09:28,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:28,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697934022] [2022-01-09 23:09:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:28,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:28,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:09:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-09 23:09:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-09 23:09:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 23:09:29,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:29,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697934022] [2022-01-09 23:09:29,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697934022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:29,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489960333] [2022-01-09 23:09:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:29,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:29,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:29,034 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 23:09:29,043 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 23:09:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:09:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-09 23:09:29,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:09:29,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489960333] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:09:29,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:09:29,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-09 23:09:29,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892139777] [2022-01-09 23:09:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:09:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:09:29,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:29,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:09:29,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:09:29,236 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:09:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:29,252 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-01-09 23:09:29,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:09:29,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-01-09 23:09:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:29,253 INFO L225 Difference]: With dead ends: 39 [2022-01-09 23:09:29,254 INFO L226 Difference]: Without dead ends: 26 [2022-01-09 23:09:29,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:09:29,258 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:29,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-09 23:09:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-09 23:09:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-09 23:09:29,264 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-01-09 23:09:29,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:29,266 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-09 23:09:29,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:09:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-09 23:09:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-09 23:09:29,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:29,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:29,291 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 23:09:29,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:29,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2022-01-09 23:09:29,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:29,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892686874] [2022-01-09 23:09:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:29,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:09:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-09 23:09:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-09 23:09:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-09 23:09:29,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:29,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892686874] [2022-01-09 23:09:29,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892686874] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:29,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520422747] [2022-01-09 23:09:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:29,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:29,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:29,606 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 23:09:29,608 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 23:09:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:09:29,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:09:29,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:09:29,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520422747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:29,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:29,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-09 23:09:29,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541766226] [2022-01-09 23:09:29,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:29,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:09:29,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:09:29,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:09:29,917 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:29,962 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-01-09 23:09:29,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:09:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-01-09 23:09:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:29,963 INFO L225 Difference]: With dead ends: 54 [2022-01-09 23:09:29,963 INFO L226 Difference]: Without dead ends: 34 [2022-01-09 23:09:29,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:09:29,965 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:29,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:29,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-09 23:09:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-09 23:09:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-09 23:09:29,971 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-01-09 23:09:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:29,971 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-09 23:09:29,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-09 23:09:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-09 23:09:29,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:29,973 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:29,999 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 23:09:30,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:30,190 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2022-01-09 23:09:30,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:30,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184013104] [2022-01-09 23:09:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:30,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:30,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-09 23:09:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:30,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-09 23:09:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-09 23:09:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-09 23:09:30,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:30,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184013104] [2022-01-09 23:09:30,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184013104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:30,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160335298] [2022-01-09 23:09:30,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:09:30,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:30,291 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 23:09:30,292 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 23:09:30,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:09:30,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:30,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:09:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-09 23:09:30,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-09 23:09:30,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160335298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:30,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:30,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-01-09 23:09:30,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311674738] [2022-01-09 23:09:30,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:30,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:09:30,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:30,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:09:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:09:30,602 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-09 23:09:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:30,655 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-01-09 23:09:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 23:09:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-01-09 23:09:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:30,660 INFO L225 Difference]: With dead ends: 70 [2022-01-09 23:09:30,660 INFO L226 Difference]: Without dead ends: 48 [2022-01-09 23:09:30,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:09:30,662 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:30,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:30,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-09 23:09:30,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-01-09 23:09:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-01-09 23:09:30,672 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-01-09 23:09:30,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:30,673 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-01-09 23:09:30,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-09 23:09:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-01-09 23:09:30,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-09 23:09:30,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:30,679 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:30,696 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 23:09:30,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:30,884 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2022-01-09 23:09:30,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:30,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093045257] [2022-01-09 23:09:30,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:30,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:30,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-09 23:09:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:31,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-09 23:09:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:31,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-09 23:09:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-01-09 23:09:31,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:31,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093045257] [2022-01-09 23:09:31,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093045257] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:31,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947580637] [2022-01-09 23:09:31,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:09:31,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:31,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:31,044 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 23:09:31,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:09:31,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:09:31,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:31,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:09:31,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-01-09 23:09:31,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-01-09 23:09:31,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947580637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:31,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:31,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-09 23:09:31,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547099694] [2022-01-09 23:09:31,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:31,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 23:09:31,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:31,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 23:09:31,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-09 23:09:31,326 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:31,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:31,358 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2022-01-09 23:09:31,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:09:31,359 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-01-09 23:09:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:31,362 INFO L225 Difference]: With dead ends: 78 [2022-01-09 23:09:31,362 INFO L226 Difference]: Without dead ends: 55 [2022-01-09 23:09:31,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-09 23:09:31,365 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:31,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-09 23:09:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-09 23:09:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-09 23:09:31,381 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 64 [2022-01-09 23:09:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:31,381 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-09 23:09:31,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-09 23:09:31,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-09 23:09:31,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:31,386 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:31,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:31,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:31,596 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash 571451455, now seen corresponding path program 4 times [2022-01-09 23:09:31,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:31,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613279364] [2022-01-09 23:09:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:31,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:31,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-09 23:09:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:31,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-09 23:09:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:31,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-09 23:09:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-01-09 23:09:31,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:31,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613279364] [2022-01-09 23:09:31,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613279364] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:31,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692054184] [2022-01-09 23:09:31,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:09:31,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:31,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:31,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:31,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:09:31,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:09:31,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:31,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-09 23:09:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-01-09 23:09:32,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-01-09 23:09:32,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692054184] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:32,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:32,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-01-09 23:09:32,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29562043] [2022-01-09 23:09:32,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:32,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-09 23:09:32,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:32,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-09 23:09:32,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:09:32,303 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:32,373 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-01-09 23:09:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-09 23:09:32,374 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 88 [2022-01-09 23:09:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:32,377 INFO L225 Difference]: With dead ends: 111 [2022-01-09 23:09:32,377 INFO L226 Difference]: Without dead ends: 79 [2022-01-09 23:09:32,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 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 23:09:32,380 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:32,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 112 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:32,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-09 23:09:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-01-09 23:09:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-01-09 23:09:32,394 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 88 [2022-01-09 23:09:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:32,395 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-01-09 23:09:32,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-01-09 23:09:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-09 23:09:32,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:32,396 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:32,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:32,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:32,600 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1629281449, now seen corresponding path program 5 times [2022-01-09 23:09:32,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733753334] [2022-01-09 23:09:32,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:32,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:32,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-09 23:09:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:32,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-09 23:09:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:32,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-09 23:09:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-01-09 23:09:32,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:32,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733753334] [2022-01-09 23:09:32,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733753334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:32,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799438344] [2022-01-09 23:09:32,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:09:32,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:32,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:32,964 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:32,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:09:34,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-01-09 23:09:34,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:09:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2022-01-09 23:09:34,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-01-09 23:09:35,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799438344] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:35,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:35,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-01-09 23:09:35,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728063025] [2022-01-09 23:09:35,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:35,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-09 23:09:35,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:35,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-09 23:09:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-01-09 23:09:35,227 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:35,329 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2022-01-09 23:09:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-09 23:09:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2022-01-09 23:09:35,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:35,330 INFO L225 Difference]: With dead ends: 130 [2022-01-09 23:09:35,331 INFO L226 Difference]: Without dead ends: 98 [2022-01-09 23:09:35,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-01-09 23:09:35,332 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:35,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-09 23:09:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-09 23:09:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-09 23:09:35,339 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 112 [2022-01-09 23:09:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:35,340 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-09 23:09:35,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-09 23:09:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-09 23:09:35,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:35,341 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:35,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:35,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-09 23:09:35,568 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1848671305, now seen corresponding path program 6 times [2022-01-09 23:09:35,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:35,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977103838] [2022-01-09 23:09:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:35,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:35,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-09 23:09:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:35,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-09 23:09:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-09 23:09:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2022-01-09 23:09:35,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977103838] [2022-01-09 23:09:35,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977103838] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:35,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272889219] [2022-01-09 23:09:35,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:09:35,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:35,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:35,948 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:35,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:09:36,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-09 23:09:36,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:36,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:09:36,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 850 proven. 4 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2022-01-09 23:09:36,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2022-01-09 23:09:36,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272889219] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:36,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:36,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2022-01-09 23:09:36,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223024836] [2022-01-09 23:09:36,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:36,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-09 23:09:36,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:36,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-09 23:09:36,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-01-09 23:09:36,594 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:36,690 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2022-01-09 23:09:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-09 23:09:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 162 [2022-01-09 23:09:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:36,691 INFO L225 Difference]: With dead ends: 156 [2022-01-09 23:09:36,691 INFO L226 Difference]: Without dead ends: 108 [2022-01-09 23:09:36,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-01-09 23:09:36,693 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:36,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-09 23:09:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-01-09 23:09:36,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-01-09 23:09:36,699 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 162 [2022-01-09 23:09:36,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:36,700 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-01-09 23:09:36,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:36,700 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-01-09 23:09:36,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-09 23:09:36,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:36,702 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:36,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:36,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:36,923 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:36,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:36,924 INFO L85 PathProgramCache]: Analyzing trace with hash -627674557, now seen corresponding path program 7 times [2022-01-09 23:09:36,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:36,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579157762] [2022-01-09 23:09:36,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:36,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:37,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-09 23:09:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:37,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-09 23:09:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:37,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-09 23:09:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:37,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579157762] [2022-01-09 23:09:37,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579157762] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:37,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147874229] [2022-01-09 23:09:37,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:09:37,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:37,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:37,310 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:37,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:09:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:37,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-09 23:09:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:37,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:38,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147874229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:38,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:38,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-01-09 23:09:38,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870715571] [2022-01-09 23:09:38,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:38,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-09 23:09:38,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:38,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-09 23:09:38,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 23:09:38,625 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:38,755 INFO L93 Difference]: Finished difference Result 215 states and 248 transitions. [2022-01-09 23:09:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-09 23:09:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 172 [2022-01-09 23:09:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:38,759 INFO L225 Difference]: With dead ends: 215 [2022-01-09 23:09:38,759 INFO L226 Difference]: Without dead ends: 159 [2022-01-09 23:09:38,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 23:09:38,761 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:38,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 112 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-09 23:09:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-01-09 23:09:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2022-01-09 23:09:38,774 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 172 [2022-01-09 23:09:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:38,775 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2022-01-09 23:09:38,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2022-01-09 23:09:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-09 23:09:38,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:38,777 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:38,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:38,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 23:09:38,995 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:38,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1171263479, now seen corresponding path program 8 times [2022-01-09 23:09:38,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:38,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669380698] [2022-01-09 23:09:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:38,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:40,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-09 23:09:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:40,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-09 23:09:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:40,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-01-09 23:09:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:40,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:40,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:40,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669380698] [2022-01-09 23:09:40,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669380698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:40,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229896803] [2022-01-09 23:09:40,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:09:40,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:40,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:40,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:40,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:09:40,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:09:40,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:40,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-09 23:09:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:40,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:43,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229896803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:43,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:43,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2022-01-09 23:09:43,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916512720] [2022-01-09 23:09:43,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:43,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-09 23:09:43,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:43,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-09 23:09:43,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-01-09 23:09:43,670 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:43,956 INFO L93 Difference]: Finished difference Result 319 states and 378 transitions. [2022-01-09 23:09:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-09 23:09:43,957 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 224 [2022-01-09 23:09:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:43,958 INFO L225 Difference]: With dead ends: 319 [2022-01-09 23:09:43,959 INFO L226 Difference]: Without dead ends: 263 [2022-01-09 23:09:43,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-01-09 23:09:43,962 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 153 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:43,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 178 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:09:43,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-09 23:09:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-01-09 23:09:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 267 transitions. [2022-01-09 23:09:43,971 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 267 transitions. Word has length 224 [2022-01-09 23:09:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:43,971 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 267 transitions. [2022-01-09 23:09:43,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 267 transitions. [2022-01-09 23:09:43,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-01-09 23:09:43,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:43,975 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:44,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:44,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-09 23:09:44,199 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1664693599, now seen corresponding path program 9 times [2022-01-09 23:09:44,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:44,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438015835] [2022-01-09 23:09:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:44,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:47,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-09 23:09:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:47,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-01-09 23:09:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:47,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2022-01-09 23:09:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:47,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:47,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438015835] [2022-01-09 23:09:47,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438015835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:47,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408358770] [2022-01-09 23:09:47,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:09:47,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:47,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:47,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:47,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:09:48,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-09 23:09:48,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:48,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:09:48,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 11417 trivial. 0 not checked. [2022-01-09 23:09:48,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:49,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12267 trivial. 0 not checked. [2022-01-09 23:09:49,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408358770] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:49,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:49,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 9, 9] total 119 [2022-01-09 23:09:49,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060920887] [2022-01-09 23:09:49,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:49,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-09 23:09:49,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:49,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-09 23:09:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2022-01-09 23:09:49,291 INFO L87 Difference]: Start difference. First operand 263 states and 267 transitions. Second operand has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:49,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:49,610 INFO L93 Difference]: Finished difference Result 338 states and 354 transitions. [2022-01-09 23:09:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-09 23:09:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 328 [2022-01-09 23:09:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:49,613 INFO L225 Difference]: With dead ends: 338 [2022-01-09 23:09:49,613 INFO L226 Difference]: Without dead ends: 282 [2022-01-09 23:09:49,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2022-01-09 23:09:49,617 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:49,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 279 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:09:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-09 23:09:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-01-09 23:09:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0108695652173914) internal successors, (279), 276 states have internal predecessors, (279), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2022-01-09 23:09:49,636 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 328 [2022-01-09 23:09:49,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:49,637 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2022-01-09 23:09:49,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2022-01-09 23:09:49,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-09 23:09:49,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:49,641 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:49,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:49,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 23:09:49,871 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:49,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash -117033647, now seen corresponding path program 10 times [2022-01-09 23:09:49,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:49,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402576298] [2022-01-09 23:09:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:49,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:53,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-01-09 23:09:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:53,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-01-09 23:09:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:53,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2022-01-09 23:09:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-01-09 23:09:53,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:53,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402576298] [2022-01-09 23:09:53,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402576298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:53,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958847815] [2022-01-09 23:09:53,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:09:53,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:53,516 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:53,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:09:53,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:09:53,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:53,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 23:09:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 1271 proven. 196 refuted. 0 times theorem prover too weak. 11201 trivial. 0 not checked. [2022-01-09 23:09:54,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 424 proven. 620 refuted. 0 times theorem prover too weak. 11624 trivial. 0 not checked. [2022-01-09 23:09:55,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958847815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:55,820 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:55,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 17, 17] total 136 [2022-01-09 23:09:55,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806269567] [2022-01-09 23:09:55,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:55,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-09 23:09:55,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:55,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-09 23:09:55,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6060, Invalid=12300, Unknown=0, NotChecked=0, Total=18360 [2022-01-09 23:09:55,826 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:56,212 INFO L93 Difference]: Finished difference Result 388 states and 415 transitions. [2022-01-09 23:09:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-09 23:09:56,212 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 346 [2022-01-09 23:09:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:56,214 INFO L225 Difference]: With dead ends: 388 [2022-01-09 23:09:56,214 INFO L226 Difference]: Without dead ends: 316 [2022-01-09 23:09:56,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6060, Invalid=12300, Unknown=0, NotChecked=0, Total=18360 [2022-01-09 23:09:56,216 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:56,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 242 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:09:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-09 23:09:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2022-01-09 23:09:56,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0096774193548388) internal successors, (313), 310 states have internal predecessors, (313), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 319 transitions. [2022-01-09 23:09:56,227 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 319 transitions. Word has length 346 [2022-01-09 23:09:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:56,227 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 319 transitions. [2022-01-09 23:09:56,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 319 transitions. [2022-01-09 23:09:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-01-09 23:09:56,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:56,230 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 90, 90, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:56,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:56,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-09 23:09:56,439 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash -29376077, now seen corresponding path program 11 times [2022-01-09 23:09:56,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:56,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107279561] [2022-01-09 23:09:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:56,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:59,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-01-09 23:10:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:10:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2022-01-09 23:10:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:10:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 375 [2022-01-09 23:10:00,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:10:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 19307 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2022-01-09 23:10:00,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:10:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107279561] [2022-01-09 23:10:00,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107279561] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:10:00,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183899878] [2022-01-09 23:10:00,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:10:00,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:10:00,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:10:00,044 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:10:00,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process