/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/loop-acceleration/phases_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 20:13:21,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 20:13:21,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 20:13:21,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-10 20:13:21,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 20:13:21,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 20:13:21,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 20:13:21,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 20:13:21,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 20:13:21,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 20:13:21,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 20:13:21,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 20:13:21,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 20:13:21,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 20:13:21,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 20:13:21,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 20:13:21,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 20:13:21,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 20:13:21,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 20:13:21,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 20:13:21,147 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 20:13:21,176 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 20:13:21,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 20:13:21,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 20:13:21,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 20:13:21,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 20:13:21,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 20:13:21,178 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 20:13:21,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 20:13:21,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 20:13:21,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 20:13:21,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 20:13:21,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 20:13:21,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 20:13:21,180 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 20:13:21,180 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 20:13:21,180 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 20:13:21,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 20:13:21,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 20:13:21,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 20:13:21,181 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 20:13:21,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 20:13:21,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:13:21,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 20:13:21,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 20:13:21,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 20:13:21,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 20:13:21,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 20:13:21,183 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 20:13:21,183 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 20:13:21,183 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 20:13:21,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 20:13:21,184 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 20:13:21,184 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 20:13:21,185 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 20:13:21,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 20:13:21,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 20:13:21,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 20:13:21,451 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 20:13:21,451 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 20:13:21,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2022-01-10 20:13:21,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43bbaa006/efe5a07fddba48c3ba44c3495fa0598f/FLAGf8a2e3c8d [2022-01-10 20:13:21,870 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 20:13:21,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2022-01-10 20:13:21,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43bbaa006/efe5a07fddba48c3ba44c3495fa0598f/FLAGf8a2e3c8d [2022-01-10 20:13:22,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/43bbaa006/efe5a07fddba48c3ba44c3495fa0598f [2022-01-10 20:13:22,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 20:13:22,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 20:13:22,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 20:13:22,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 20:13:22,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 20:13:22,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39b601b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22, skipping insertion in model container [2022-01-10 20:13:22,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 20:13:22,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 20:13:22,452 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-1.c[322,335] [2022-01-10 20:13:22,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:13:22,474 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 20:13:22,485 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-1.c[322,335] [2022-01-10 20:13:22,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 20:13:22,501 INFO L208 MainTranslator]: Completed translation [2022-01-10 20:13:22,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22 WrapperNode [2022-01-10 20:13:22,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 20:13:22,502 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 20:13:22,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 20:13:22,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 20:13:22,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,515 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,528 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-01-10 20:13:22,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 20:13:22,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 20:13:22,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 20:13:22,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 20:13:22,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 20:13:22,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 20:13:22,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 20:13:22,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 20:13:22,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 20:13:22,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:13:22,580 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 20:13:22,607 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 20:13:22,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 20:13:22,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 20:13:22,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 20:13:22,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 20:13:22,678 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 20:13:22,679 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 20:13:22,795 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 20:13:22,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 20:13:22,801 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 20:13:22,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:13:22 BoogieIcfgContainer [2022-01-10 20:13:22,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 20:13:22,803 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 20:13:22,803 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 20:13:22,804 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 20:13:22,806 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:13:22" (1/1) ... [2022-01-10 20:13:22,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:13:22 BasicIcfg [2022-01-10 20:13:22,845 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 20:13:22,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 20:13:22,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 20:13:22,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 20:13:22,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:13:22" (1/4) ... [2022-01-10 20:13:22,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee923b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:13:22, skipping insertion in model container [2022-01-10 20:13:22,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:13:22" (2/4) ... [2022-01-10 20:13:22,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee923b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:13:22, skipping insertion in model container [2022-01-10 20:13:22,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:13:22" (3/4) ... [2022-01-10 20:13:22,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee923b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:13:22, skipping insertion in model container [2022-01-10 20:13:22,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:13:22" (4/4) ... [2022-01-10 20:13:22,851 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-1.cTransformedIcfg [2022-01-10 20:13:22,855 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 20:13:22,855 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 20:13:22,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 20:13:22,889 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 20:13:22,889 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 20:13:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 20:13:22,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:13:22,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 20:13:22,903 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:13:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:13:22,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1953496263, now seen corresponding path program 1 times [2022-01-10 20:13:22,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:13:22,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304441423] [2022-01-10 20:13:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:13:22,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:13:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:13:23,059 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 20:13:23,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:13:23,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304441423] [2022-01-10 20:13:23,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304441423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:13:23,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:13:23,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 20:13:23,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352499912] [2022-01-10 20:13:23,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:13:23,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 20:13:23,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:13:23,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 20:13:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 20:13:23,096 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:23,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:13:23,109 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-01-10 20:13:23,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 20:13:23,110 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-10 20:13:23,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:13:23,119 INFO L225 Difference]: With dead ends: 20 [2022-01-10 20:13:23,119 INFO L226 Difference]: Without dead ends: 8 [2022-01-10 20:13:23,121 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 20:13:23,124 INFO L933 BasicCegarLoop]: 13 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, 13 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 20:13:23,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:13:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-01-10 20:13:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-01-10 20:13:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:23,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-01-10 20:13:23,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-01-10 20:13:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:13:23,155 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-01-10 20:13:23,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-01-10 20:13:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 20:13:23,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:13:23,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 20:13:23,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 20:13:23,157 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:13:23,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:13:23,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1953526054, now seen corresponding path program 1 times [2022-01-10 20:13:23,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:13:23,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393009206] [2022-01-10 20:13:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:13:23,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:13:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:13:23,240 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 20:13:23,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:13:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393009206] [2022-01-10 20:13:23,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393009206] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 20:13:23,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 20:13:23,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 20:13:23,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817436842] [2022-01-10 20:13:23,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 20:13:23,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 20:13:23,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:13:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 20:13:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:13:23,244 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:13:23,257 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-01-10 20:13:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 20:13:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-01-10 20:13:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:13:23,258 INFO L225 Difference]: With dead ends: 16 [2022-01-10 20:13:23,258 INFO L226 Difference]: Without dead ends: 10 [2022-01-10 20:13:23,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 20:13:23,260 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 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 20:13:23,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:13:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-10 20:13:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-01-10 20:13:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 20:13:23,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-01-10 20:13:23,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-01-10 20:13:23,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:13:23,263 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-01-10 20:13:23,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-01-10 20:13:23,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 20:13:23,264 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:13:23,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:13:23,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 20:13:23,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:13:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:13:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash 467229864, now seen corresponding path program 1 times [2022-01-10 20:13:23,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:13:23,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016205912] [2022-01-10 20:13:23,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:13:23,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:13:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:13:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:13:23,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:13:23,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016205912] [2022-01-10 20:13:23,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016205912] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:13:23,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752601252] [2022-01-10 20:13:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:13:23,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:13:23,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:13:23,308 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 20:13:23,353 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 20:13:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:13:23,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 20:13:23,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:13:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:13:23,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:13:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:13:23,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752601252] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:13:23,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:13:23,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 20:13:23,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438113399] [2022-01-10 20:13:23,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:13:23,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 20:13:23,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:13:23,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 20:13:23,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 20:13:23,519 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:13:23,582 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-01-10 20:13:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 20:13:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-10 20:13:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:13:23,584 INFO L225 Difference]: With dead ends: 20 [2022-01-10 20:13:23,584 INFO L226 Difference]: Without dead ends: 14 [2022-01-10 20:13:23,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 20:13:23,587 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 20:13:23,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 20:13:23,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-10 20:13:23,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-01-10 20:13:23,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-01-10 20:13:23,595 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-01-10 20:13:23,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:13:23,596 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-01-10 20:13:23,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 20:13:23,596 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-01-10 20:13:23,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 20:13:23,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:13:23,596 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:13:23,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 20:13:23,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:13:23,797 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:13:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:13:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash 921100717, now seen corresponding path program 1 times [2022-01-10 20:13:23,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:13:23,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754624343] [2022-01-10 20:13:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:13:23,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:13:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:13:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:13:23,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:13:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754624343] [2022-01-10 20:13:23,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754624343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:13:23,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645237453] [2022-01-10 20:13:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:13:23,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:13:23,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:13:23,893 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 20:13:23,900 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 20:13:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:13:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 20:13:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:13:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:13:23,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:13:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:13:24,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645237453] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:13:24,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:13:24,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-10 20:13:24,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15785223] [2022-01-10 20:13:24,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:13:24,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 20:13:24,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:13:24,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 20:13:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-10 20:13:24,076 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 20:13:24,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:13:24,169 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-01-10 20:13:24,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 20:13:24,170 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 20:13:24,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:13:24,170 INFO L225 Difference]: With dead ends: 28 [2022-01-10 20:13:24,171 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 20:13:24,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-10 20:13:24,172 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:13:24,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 20:13:24,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 20:13:24,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 20:13:24,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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 20:13:24,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 20:13:24,177 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2022-01-10 20:13:24,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:13:24,178 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 20:13:24,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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 20:13:24,178 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 20:13:24,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 20:13:24,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:13:24,179 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 20:13:24,203 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 20:13:24,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 20:13:24,392 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:13:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:13:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash 70751925, now seen corresponding path program 2 times [2022-01-10 20:13:24,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:13:24,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974648044] [2022-01-10 20:13:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:13:24,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:13:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:13:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 20:13:24,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:13:24,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974648044] [2022-01-10 20:13:24,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974648044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:13:24,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677863279] [2022-01-10 20:13:24,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 20:13:24,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:13:24,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:13:24,578 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 20:13:24,580 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 20:13:24,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 20:13:24,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:13:24,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 20:13:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:13:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 3 refuted. 1 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 20:13:43,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:13:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 20:13:44,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677863279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:13:44,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:13:44,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 19 [2022-01-10 20:13:44,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272730205] [2022-01-10 20:13:44,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:13:44,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 20:13:44,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:13:44,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 20:13:44,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=236, Unknown=8, NotChecked=0, Total=342 [2022-01-10 20:13:44,089 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 20:14:35,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:14:35,882 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-01-10 20:14:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 20:14:35,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 20 [2022-01-10 20:14:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:14:35,884 INFO L225 Difference]: With dead ends: 36 [2022-01-10 20:14:35,884 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 20:14:35,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 70.2s TimeCoverageRelationStatistics Valid=236, Invalid=501, Unknown=19, NotChecked=0, Total=756 [2022-01-10 20:14:35,885 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 20:14:35,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 36 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-01-10 20:14:35,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 20:14:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 20:14:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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 20:14:35,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-10 20:14:35,893 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2022-01-10 20:14:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:14:35,893 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-10 20:14:35,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 20:14:35,893 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-10 20:14:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 20:14:35,894 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:14:35,894 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1] [2022-01-10 20:14:35,920 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 20:14:36,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:14:36,095 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:14:36,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:14:36,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1663084675, now seen corresponding path program 3 times [2022-01-10 20:14:36,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:14:36,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032009450] [2022-01-10 20:14:36,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:14:36,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:14:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:14:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 20:14:36,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:14:36,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032009450] [2022-01-10 20:14:36,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032009450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:14:36,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316072088] [2022-01-10 20:14:36,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 20:14:36,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:14:36,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:14:36,271 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 20:14:36,272 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 20:14:36,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-10 20:14:36,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:14:36,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-10 20:14:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 20:14:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 20:14:37,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 20:14:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 20:14:37,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316072088] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 20:14:37,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 20:14:37,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 8] total 21 [2022-01-10 20:14:37,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96933676] [2022-01-10 20:14:37,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 20:14:37,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-10 20:14:37,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 20:14:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-10 20:14:37,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2022-01-10 20:14:37,697 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 20:14:38,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 20:14:38,761 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-01-10 20:14:38,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-10 20:14:38,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 20:14:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 20:14:38,763 INFO L225 Difference]: With dead ends: 57 [2022-01-10 20:14:38,763 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 20:14:38,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2022-01-10 20:14:38,764 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 20:14:38,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 21 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 149 Invalid, 0 Unknown, 59 Unchecked, 0.4s Time] [2022-01-10 20:14:38,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 20:14:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-01-10 20:14:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 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 20:14:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-01-10 20:14:38,773 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-01-10 20:14:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 20:14:38,773 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-01-10 20:14:38,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 20:14:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-01-10 20:14:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 20:14:38,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 20:14:38,774 INFO L514 BasicCegarLoop]: trace histogram [16, 8, 8, 1, 1, 1, 1, 1, 1] [2022-01-10 20:14:38,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-10 20:14:38,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:14:38,975 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 20:14:38,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 20:14:38,975 INFO L85 PathProgramCache]: Analyzing trace with hash 653251150, now seen corresponding path program 4 times [2022-01-10 20:14:38,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 20:14:38,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786535449] [2022-01-10 20:14:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 20:14:38,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 20:14:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 20:14:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 135 proven. 72 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-10 20:14:39,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 20:14:39,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786535449] [2022-01-10 20:14:39,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786535449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 20:14:39,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739600509] [2022-01-10 20:14:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 20:14:39,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 20:14:39,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 20:14:39,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 20:14:39,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 20:14:39,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 20:14:39,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 20:14:39,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-10 20:14:39,343 INFO L286 TraceCheckSpWp]: Computing forward predicates...