/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf -i ../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 23:39:20,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 23:39:20,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 23:39:20,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 23:39:20,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 23:39:20,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 23:39:20,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 23:39:20,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 23:39:20,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 23:39:20,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 23:39:20,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 23:39:20,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 23:39:20,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 23:39:20,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 23:39:20,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 23:39:20,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 23:39:20,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 23:39:20,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_NONE.epf [2022-01-10 23:39:20,184 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 23:39:20,184 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 23:39:20,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 23:39:20,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 23:39:20,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 23:39:20,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 23:39:20,186 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 23:39:20,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 23:39:20,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 23:39:20,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 23:39:20,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 23:39:20,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 23:39:20,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 23:39:20,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 23:39:20,187 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 23:39:20,187 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 23:39:20,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 23:39:20,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:39:20,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 23:39:20,188 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 23:39:20,189 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 23:39:20,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 23:39:20,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 23:39:20,189 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 23:39:20,189 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 23:39:20,189 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_NONE 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 23:39:20,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 23:39:20,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 23:39:20,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 23:39:20,390 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 23:39:20,390 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 23:39:20,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2022-01-10 23:39:20,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d720fc2ba/2c17f7f58a164a3fa8f7c07f2a36fca2/FLAGedf9fb2e2 [2022-01-10 23:39:20,807 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 23:39:20,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2022-01-10 23:39:20,814 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d720fc2ba/2c17f7f58a164a3fa8f7c07f2a36fca2/FLAGedf9fb2e2 [2022-01-10 23:39:20,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d720fc2ba/2c17f7f58a164a3fa8f7c07f2a36fca2 [2022-01-10 23:39:20,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 23:39:20,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 23:39:20,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 23:39:20,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 23:39:20,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 23:39:20,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:39:20" (1/1) ... [2022-01-10 23:39:20,841 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c698ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:20, skipping insertion in model container [2022-01-10 23:39:20,841 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 11:39:20" (1/1) ... [2022-01-10 23:39:20,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 23:39:20,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 23:39:21,103 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2022-01-10 23:39:21,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:39:21,111 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 23:39:21,160 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i[24151,24164] [2022-01-10 23:39:21,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 23:39:21,185 INFO L208 MainTranslator]: Completed translation [2022-01-10 23:39:21,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21 WrapperNode [2022-01-10 23:39:21,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 23:39:21,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 23:39:21,187 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 23:39:21,187 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 23:39:21,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,213 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,228 INFO L137 Inliner]: procedures = 129, calls = 36, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 133 [2022-01-10 23:39:21,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 23:39:21,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 23:39:21,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 23:39:21,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 23:39:21,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 23:39:21,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 23:39:21,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 23:39:21,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 23:39:21,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 23:39:21,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:39:21,293 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) [2022-01-10 23:39:21,299 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 [2022-01-10 23:39:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 23:39:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 23:39:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 23:39:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-01-10 23:39:21,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-01-10 23:39:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 23:39:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 23:39:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-01-10 23:39:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 23:39:21,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 23:39:21,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 23:39:21,397 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 23:39:21,398 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 23:39:21,553 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 23:39:21,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 23:39:21,557 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-10 23:39:21,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:39:21 BoogieIcfgContainer [2022-01-10 23:39:21,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 23:39:21,559 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 23:39:21,559 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 23:39:21,560 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 23:39:21,562 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:39:21" (1/1) ... [2022-01-10 23:39:21,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:39:21 BasicIcfg [2022-01-10 23:39:21,646 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 23:39:21,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 23:39:21,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 23:39:21,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 23:39:21,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 11:39:20" (1/4) ... [2022-01-10 23:39:21,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342212bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:39:21, skipping insertion in model container [2022-01-10 23:39:21,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 11:39:21" (2/4) ... [2022-01-10 23:39:21,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342212bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 11:39:21, skipping insertion in model container [2022-01-10 23:39:21,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 11:39:21" (3/4) ... [2022-01-10 23:39:21,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@342212bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 11:39:21, skipping insertion in model container [2022-01-10 23:39:21,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 11:39:21" (4/4) ... [2022-01-10 23:39:21,650 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.iTransformedIcfg [2022-01-10 23:39:21,660 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 23:39:21,661 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 23:39:21,687 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 23:39:21,692 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 [2022-01-10 23:39:21,692 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 23:39:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:21,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 23:39:21,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:21,703 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:21,704 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:21,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1453618607, now seen corresponding path program 1 times [2022-01-10 23:39:21,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:21,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319541734] [2022-01-10 23:39:21,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:21,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:39:21,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:21,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319541734] [2022-01-10 23:39:21,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319541734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:39:21,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:39:21,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 23:39:21,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655957055] [2022-01-10 23:39:21,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:39:21,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 23:39:21,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:39:22,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 23:39:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 23:39:22,007 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:39:22,022 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-01-10 23:39:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 23:39:22,023 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 23:39:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:39:22,031 INFO L225 Difference]: With dead ends: 49 [2022-01-10 23:39:22,032 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 23:39:22,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 23:39:22,041 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:39:22,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:39:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 23:39:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-01-10 23:39:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-10 23:39:22,063 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 12 [2022-01-10 23:39:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:39:22,063 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-10 23:39:22,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-10 23:39:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 23:39:22,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:22,065 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:22,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 23:39:22,066 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:22,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash -566085135, now seen corresponding path program 1 times [2022-01-10 23:39:22,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:22,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846218236] [2022-01-10 23:39:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:22,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:39:22,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:22,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846218236] [2022-01-10 23:39:22,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846218236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:39:22,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:39:22,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 23:39:22,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773282234] [2022-01-10 23:39:22,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:39:22,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 23:39:22,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:39:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 23:39:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 23:39:22,268 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:39:22,294 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-01-10 23:39:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 23:39:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-10 23:39:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:39:22,295 INFO L225 Difference]: With dead ends: 45 [2022-01-10 23:39:22,295 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 23:39:22,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 23:39:22,300 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:39:22,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:39:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 23:39:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-01-10 23:39:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-01-10 23:39:22,311 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 12 [2022-01-10 23:39:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:39:22,313 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-01-10 23:39:22,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-01-10 23:39:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-10 23:39:22,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:22,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:22,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 23:39:22,314 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:22,314 INFO L85 PathProgramCache]: Analyzing trace with hash 32407498, now seen corresponding path program 1 times [2022-01-10 23:39:22,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:22,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312972207] [2022-01-10 23:39:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:22,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 23:39:22,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:22,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312972207] [2022-01-10 23:39:22,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312972207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:39:22,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:39:22,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 23:39:22,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844071244] [2022-01-10 23:39:22,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:39:22,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 23:39:22,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:39:22,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 23:39:22,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 23:39:22,480 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:39:22,508 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-01-10 23:39:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 23:39:22,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-10 23:39:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:39:22,510 INFO L225 Difference]: With dead ends: 40 [2022-01-10 23:39:22,510 INFO L226 Difference]: Without dead ends: 36 [2022-01-10 23:39:22,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 23:39:22,516 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:39:22,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 51 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:39:22,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-10 23:39:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-01-10 23:39:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-10 23:39:22,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 16 [2022-01-10 23:39:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:39:22,525 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-10 23:39:22,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-10 23:39:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 23:39:22,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:22,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:22,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-10 23:39:22,526 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1142861609, now seen corresponding path program 1 times [2022-01-10 23:39:22,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:22,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966709700] [2022-01-10 23:39:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:22,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 23:39:22,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966709700] [2022-01-10 23:39:22,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966709700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:39:22,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:39:22,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-10 23:39:22,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000764769] [2022-01-10 23:39:22,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:39:22,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 23:39:22,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:39:22,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 23:39:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-10 23:39:22,700 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:39:22,855 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-01-10 23:39:22,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 23:39:22,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-01-10 23:39:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:39:22,856 INFO L225 Difference]: With dead ends: 41 [2022-01-10 23:39:22,856 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 23:39:22,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-10 23:39:22,857 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 23:39:22,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 67 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 23:39:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 23:39:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-01-10 23:39:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-01-10 23:39:22,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-01-10 23:39:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:39:22,861 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-01-10 23:39:22,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:22,861 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-01-10 23:39:22,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 23:39:22,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:22,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:22,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-10 23:39:22,862 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:22,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1965093645, now seen corresponding path program 1 times [2022-01-10 23:39:22,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:22,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492403555] [2022-01-10 23:39:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:22,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 23:39:22,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492403555] [2022-01-10 23:39:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492403555] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 23:39:22,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 23:39:22,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 23:39:22,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085748790] [2022-01-10 23:39:22,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 23:39:22,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 23:39:22,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:39:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 23:39:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 23:39:22,988 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:39:23,046 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2022-01-10 23:39:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 23:39:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-10 23:39:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:39:23,048 INFO L225 Difference]: With dead ends: 45 [2022-01-10 23:39:23,048 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 23:39:23,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 23:39:23,049 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:39:23,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:39:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 23:39:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 23:39:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-01-10 23:39:23,066 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 26 [2022-01-10 23:39:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:39:23,066 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-01-10 23:39:23,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-01-10 23:39:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-10 23:39:23,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:23,067 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:23,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-10 23:39:23,068 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:23,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1431769806, now seen corresponding path program 1 times [2022-01-10 23:39:23,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:23,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583271203] [2022-01-10 23:39:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:23,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 23:39:23,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:23,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583271203] [2022-01-10 23:39:23,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583271203] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:39:23,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740142689] [2022-01-10 23:39:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:23,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:39:23,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:39:23,221 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) [2022-01-10 23:39:23,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 23:39:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:23,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-10 23:39:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:39:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 23:39:23,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:39:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 23:39:23,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740142689] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:39:23,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:39:23,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-01-10 23:39:23,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933028589] [2022-01-10 23:39:23,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:39:23,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 23:39:23,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:39:23,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 23:39:23,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-10 23:39:23,768 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:39:23,837 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-01-10 23:39:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 23:39:23,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-10 23:39:23,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:39:23,839 INFO L225 Difference]: With dead ends: 59 [2022-01-10 23:39:23,839 INFO L226 Difference]: Without dead ends: 55 [2022-01-10 23:39:23,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-01-10 23:39:23,842 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 131 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 23:39:23,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 176 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 23:39:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-10 23:39:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2022-01-10 23:39:23,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:23,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-01-10 23:39:23,849 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2022-01-10 23:39:23,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:39:23,849 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-01-10 23:39:23,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-01-10 23:39:23,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-10 23:39:23,851 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:23,851 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:23,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-10 23:39:24,067 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,SelfDestructingSolverStorable5 [2022-01-10 23:39:24,068 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:24,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1014546478, now seen corresponding path program 2 times [2022-01-10 23:39:24,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:24,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712365109] [2022-01-10 23:39:24,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:24,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 23:39:24,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:24,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712365109] [2022-01-10 23:39:24,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712365109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:39:25,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603753438] [2022-01-10 23:39:25,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 23:39:25,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:39:25,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:39:25,001 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) [2022-01-10 23:39:25,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 23:39:25,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 23:39:25,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 23:39:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 79 conjunts are in the unsatisfiable core [2022-01-10 23:39:25,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:39:25,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 23:39:25,524 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-10 23:39:25,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2022-01-10 23:39:25,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 23:39:25,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 43 [2022-01-10 23:39:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-10 23:39:25,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:39:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 23:39:25,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603753438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:39:25,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:39:25,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 7] total 28 [2022-01-10 23:39:25,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207912531] [2022-01-10 23:39:25,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:39:25,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-10 23:39:25,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:39:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-10 23:39:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-01-10 23:39:25,997 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:26,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:39:26,951 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-01-10 23:39:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-10 23:39:26,952 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-01-10 23:39:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:39:26,952 INFO L225 Difference]: With dead ends: 75 [2022-01-10 23:39:26,952 INFO L226 Difference]: Without dead ends: 53 [2022-01-10 23:39:26,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 23:39:26,953 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 203 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 23:39:26,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 131 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-10 23:39:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-10 23:39:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2022-01-10 23:39:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-01-10 23:39:26,960 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 40 [2022-01-10 23:39:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:39:26,960 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-01-10 23:39:26,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.2142857142857144) internal successors, (90), 28 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:26,960 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-01-10 23:39:26,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-10 23:39:26,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:26,961 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:26,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 23:39:27,175 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,SelfDestructingSolverStorable6 [2022-01-10 23:39:27,175 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:27,176 INFO L85 PathProgramCache]: Analyzing trace with hash -623459762, now seen corresponding path program 1 times [2022-01-10 23:39:27,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:27,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096289169] [2022-01-10 23:39:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:27,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:27,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 23:39:27,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:27,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096289169] [2022-01-10 23:39:27,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096289169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:39:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919658234] [2022-01-10 23:39:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:27,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:39:27,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:39:27,411 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) [2022-01-10 23:39:27,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 23:39:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:27,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 902 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-10 23:39:27,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:39:27,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 23:39:27,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 62 [2022-01-10 23:39:27,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-10 23:39:27,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 37 [2022-01-10 23:39:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 23:39:27,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:39:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-10 23:39:27,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919658234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 23:39:27,926 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 23:39:27,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2022-01-10 23:39:27,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662230896] [2022-01-10 23:39:27,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 23:39:27,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 23:39:27,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 23:39:27,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 23:39:27,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-10 23:39:27,928 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 23:39:28,028 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2022-01-10 23:39:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-10 23:39:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-01-10 23:39:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 23:39:28,029 INFO L225 Difference]: With dead ends: 89 [2022-01-10 23:39:28,029 INFO L226 Difference]: Without dead ends: 57 [2022-01-10 23:39:28,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-10 23:39:28,030 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 23:39:28,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 81 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-01-10 23:39:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-10 23:39:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-01-10 23:39:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-01-10 23:39:28,038 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 42 [2022-01-10 23:39:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 23:39:28,038 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-01-10 23:39:28,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 23:39:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-01-10 23:39:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-10 23:39:28,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 23:39:28,039 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 23:39:28,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 23:39:28,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:39:28,256 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 23:39:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 23:39:28,257 INFO L85 PathProgramCache]: Analyzing trace with hash 133542441, now seen corresponding path program 2 times [2022-01-10 23:39:28,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 23:39:28,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661923477] [2022-01-10 23:39:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 23:39:28,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 23:39:28,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 23:39:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 23:39:29,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 23:39:29,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661923477] [2022-01-10 23:39:29,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661923477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 23:39:29,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949966691] [2022-01-10 23:39:29,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 23:39:29,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 23:39:29,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 23:39:29,784 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) [2022-01-10 23:39:29,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 23:39:29,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 23:39:29,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 23:39:29,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 101 conjunts are in the unsatisfiable core [2022-01-10 23:39:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 23:39:30,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 23:39:30,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-10 23:39:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 23:39:30,273 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-01-10 23:39:30,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 37 [2022-01-10 23:39:30,282 INFO L353 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-01-10 23:39:30,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 39 [2022-01-10 23:39:31,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-10 23:39:31,425 INFO L353 Elim1Store]: treesize reduction 94, result has 24.8 percent of original size [2022-01-10 23:39:31,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 232 treesize of output 127 [2022-01-10 23:39:31,436 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-01-10 23:39:31,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 41 [2022-01-10 23:39:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 23:39:31,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 23:39:33,395 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.baseInt| Int)) (let ((.cse5 (store |c_#memory_$Pointer$.offsetInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.baseInt| (store (select |c_#memory_$Pointer$.offsetInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.baseInt|) |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.offsetInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~head~0#1.offsetInt|))) (.cse2 (store |c_#memory_$Pointer$.baseInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.baseInt| (store (select |c_#memory_$Pointer$.baseInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.baseInt|) |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~last~0#1.offsetInt| |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~head~0#1.baseInt|)))) (let ((.cse0 (select (select .cse2 |ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.baseInt|) |c_ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.offsetInt|)) (.cse1 (select (select .cse5 |ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.baseInt|) |c_ULTIMATE.start_ULTIMATE.start_main_~#s~0#1.offsetInt|))) (let ((.cse3 (select (select .cse2 .cse0) .cse1)) (.cse4 (select (select .cse5 .cse0) .cse1))) (or (not (= .cse0 |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~head~0#1.baseInt|)) (not (= |c_ULTIMATE.start_ULTIMATE.start_sll_circular_create_~head~0#1.offsetInt| .cse1)) (not (= .cse0 (select (select .cse2 (select (select .cse2 .cse3) .cse4)) (select (select .cse5 .cse3) .cse4)))) (and (= .cse3 .cse0) (= .cse4 .cse1))))))) is different from false [2022-01-10 23:39:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-10 23:39:55,420 WARN L228 SmtUtils]: Spent 21.93s on a formula simplification. DAG size of input: 2031 DAG size of output: 957 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-10 23:39:55,427 INFO L353 Elim1Store]: treesize reduction 31738, result has 35.6 percent of original size [2022-01-10 23:39:55,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 35 select indices, 35 select index equivalence classes, 0 disjoint index pairs (out of 595 index pairs), introduced 51 new quantified variables, introduced 595 case distinctions, treesize of input 370638 treesize of output 287330