/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_SUM.epf -i ../../../trunk/examples/svcomp/array-patterns/array28_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-11 03:16:40,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-11 03:16:40,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-11 03:16:40,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-11 03:16:40,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-11 03:16:40,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-11 03:16:40,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-11 03:16:40,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-11 03:16:40,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-11 03:16:40,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-11 03:16:40,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-11 03:16:40,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-11 03:16:40,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-11 03:16:40,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-11 03:16:40,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-11 03:16:40,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-11 03:16:40,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-11 03:16:40,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-11 03:16:40,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-11 03:16:40,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-11 03:16:40,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-11 03:16:40,549 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-01-11 03:16:40,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-11 03:16:40,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-11 03:16:40,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-11 03:16:40,553 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_SUM.epf [2022-01-11 03:16:40,585 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-11 03:16:40,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-11 03:16:40,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-11 03:16:40,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-11 03:16:40,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Use SBE=true [2022-01-11 03:16:40,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-11 03:16:40,587 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-11 03:16:40,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 03:16:40,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-11 03:16:40,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-11 03:16:40,589 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-11 03:16:40,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-11 03:16:40,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-11 03:16:40,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-11 03:16:40,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-11 03:16:40,589 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-11 03:16:40,589 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_SUM 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-11 03:16:40,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-11 03:16:40,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-11 03:16:40,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-11 03:16:40,800 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-11 03:16:40,801 INFO L275 PluginConnector]: CDTParser initialized [2022-01-11 03:16:40,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array28_pattern.c [2022-01-11 03:16:40,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05d53005f/e1d01e8fb19447d3b41d1c7cc1292b7a/FLAGe7db4e820 [2022-01-11 03:16:41,230 INFO L306 CDTParser]: Found 1 translation units. [2022-01-11 03:16:41,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array28_pattern.c [2022-01-11 03:16:41,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05d53005f/e1d01e8fb19447d3b41d1c7cc1292b7a/FLAGe7db4e820 [2022-01-11 03:16:41,243 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05d53005f/e1d01e8fb19447d3b41d1c7cc1292b7a [2022-01-11 03:16:41,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-11 03:16:41,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-11 03:16:41,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-11 03:16:41,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-11 03:16:41,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-11 03:16:41,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ce34b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41, skipping insertion in model container [2022-01-11 03:16:41,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,255 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-11 03:16:41,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-11 03:16:41,386 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array28_pattern.c[1246,1259] [2022-01-11 03:16:41,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 03:16:41,417 INFO L203 MainTranslator]: Completed pre-run [2022-01-11 03:16:41,429 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array28_pattern.c[1246,1259] [2022-01-11 03:16:41,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-11 03:16:41,460 INFO L208 MainTranslator]: Completed translation [2022-01-11 03:16:41,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41 WrapperNode [2022-01-11 03:16:41,461 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-11 03:16:41,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-11 03:16:41,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-11 03:16:41,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-11 03:16:41,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,485 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-01-11 03:16:41,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-11 03:16:41,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-11 03:16:41,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-11 03:16:41,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-11 03:16:41,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,491 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-11 03:16:41,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-11 03:16:41,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-11 03:16:41,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-11 03:16:41,505 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (1/1) ... [2022-01-11 03:16:41,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-11 03:16:41,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:16:41,536 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) [2022-01-11 03:16:41,541 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 [2022-01-11 03:16:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-11 03:16:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-11 03:16:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-11 03:16:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-11 03:16:41,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-11 03:16:41,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-11 03:16:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-11 03:16:41,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-11 03:16:41,621 INFO L234 CfgBuilder]: Building ICFG [2022-01-11 03:16:41,622 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-11 03:16:42,108 INFO L275 CfgBuilder]: Performing block encoding [2022-01-11 03:16:42,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-11 03:16:42,113 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-01-11 03:16:42,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:16:42 BoogieIcfgContainer [2022-01-11 03:16:42,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-11 03:16:42,114 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-11 03:16:42,114 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-11 03:16:42,115 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-11 03:16:42,117 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:16:42" (1/1) ... [2022-01-11 03:16:42,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:16:42 BasicIcfg [2022-01-11 03:16:42,202 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-11 03:16:42,203 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-11 03:16:42,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-11 03:16:42,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-11 03:16:42,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.01 03:16:41" (1/4) ... [2022-01-11 03:16:42,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11032d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:16:42, skipping insertion in model container [2022-01-11 03:16:42,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.01 03:16:41" (2/4) ... [2022-01-11 03:16:42,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11032d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.01 03:16:42, skipping insertion in model container [2022-01-11 03:16:42,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.01 03:16:42" (3/4) ... [2022-01-11 03:16:42,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11032d52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.01 03:16:42, skipping insertion in model container [2022-01-11 03:16:42,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 11.01 03:16:42" (4/4) ... [2022-01-11 03:16:42,207 INFO L111 eAbstractionObserver]: Analyzing ICFG array28_pattern.cTransformedIcfg [2022-01-11 03:16:42,210 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-11 03:16:42,210 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-11 03:16:42,238 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-11 03:16:42,243 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 [2022-01-11 03:16:42,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-11 03:16:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 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) [2022-01-11 03:16:42,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 03:16:42,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:16:42,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:16:42,254 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:16:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:16:42,257 INFO L85 PathProgramCache]: Analyzing trace with hash -793395215, now seen corresponding path program 1 times [2022-01-11 03:16:42,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:16:42,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482079007] [2022-01-11 03:16:42,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:42,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:16:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:16:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:16:42,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:16:42,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482079007] [2022-01-11 03:16:42,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482079007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:16:42,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:16:42,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-11 03:16:42,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75370158] [2022-01-11 03:16:42,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:16:42,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-11 03:16:42,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:16:42,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-11 03:16:42,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-11 03:16:42,434 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-01-11 03:16:42,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:16:42,452 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2022-01-11 03:16:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-11 03:16:42,453 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2022-01-11 03:16:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:16:42,459 INFO L225 Difference]: With dead ends: 43 [2022-01-11 03:16:42,459 INFO L226 Difference]: Without dead ends: 19 [2022-01-11 03:16:42,461 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 [2022-01-11 03:16:42,464 INFO L933 BasicCegarLoop]: 28 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, 28 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 [2022-01-11 03:16:42,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 03:16:42,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-01-11 03:16:42,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-01-11 03:16:42,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2022-01-11 03:16:42,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-01-11 03:16:42,493 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2022-01-11 03:16:42,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:16:42,494 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-01-11 03:16:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-01-11 03:16:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-01-11 03:16:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-11 03:16:42,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:16:42,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:16:42,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-11 03:16:42,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:16:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:16:42,499 INFO L85 PathProgramCache]: Analyzing trace with hash 978074062, now seen corresponding path program 1 times [2022-01-11 03:16:42,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:16:42,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451630717] [2022-01-11 03:16:42,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:42,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:16:42,553 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:16:42,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458996759] [2022-01-11 03:16:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:42,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:16:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:16:42,555 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) [2022-01-11 03:16:42,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-11 03:16:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:16:42,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-11 03:16:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:16:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:16:42,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 03:16:42,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:16:42,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451630717] [2022-01-11 03:16:42,766 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:16:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458996759] [2022-01-11 03:16:42,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458996759] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:16:42,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:16:42,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 03:16:42,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705799529] [2022-01-11 03:16:42,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:16:42,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:16:42,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:16:42,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:16:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:16:42,772 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-01-11 03:16:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:16:42,830 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-01-11 03:16:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 03:16:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2022-01-11 03:16:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:16:42,831 INFO L225 Difference]: With dead ends: 26 [2022-01-11 03:16:42,831 INFO L226 Difference]: Without dead ends: 22 [2022-01-11 03:16:42,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-11 03:16:42,832 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-11 03:16:42,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-11 03:16:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-11 03:16:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-11 03:16:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-01-11 03:16:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-01-11 03:16:42,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2022-01-11 03:16:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:16:42,836 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-01-11 03:16:42,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-01-11 03:16:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-01-11 03:16:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-11 03:16:42,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:16:42,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:16:42,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-11 03:16:43,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:16:43,037 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:16:43,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:16:43,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1519199733, now seen corresponding path program 1 times [2022-01-11 03:16:43,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:16:43,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692630201] [2022-01-11 03:16:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:43,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:16:43,059 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:16:43,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060142061] [2022-01-11 03:16:43,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:43,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:16:43,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:16:43,062 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) [2022-01-11 03:16:43,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-11 03:16:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:16:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-11 03:16:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:16:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 03:16:43,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 03:16:43,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:16:43,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692630201] [2022-01-11 03:16:43,447 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:16:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060142061] [2022-01-11 03:16:43,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060142061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:16:43,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:16:43,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 03:16:43,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262709050] [2022-01-11 03:16:43,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:16:43,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 03:16:43,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:16:43,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 03:16:43,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-11 03:16:43,449 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-01-11 03:16:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:16:43,724 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-01-11 03:16:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 03:16:43,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-11 03:16:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:16:43,725 INFO L225 Difference]: With dead ends: 46 [2022-01-11 03:16:43,725 INFO L226 Difference]: Without dead ends: 34 [2022-01-11 03:16:43,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-11 03:16:43,727 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 03:16:43,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 13 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 03:16:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-11 03:16:43,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 23. [2022-01-11 03:16:43,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2022-01-11 03:16:43,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-11 03:16:43,732 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2022-01-11 03:16:43,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:16:43,732 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-11 03:16:43,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-01-11 03:16:43,733 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-11 03:16:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-11 03:16:43,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:16:43,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-11 03:16:43,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-11 03:16:43,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-11 03:16:43,939 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:16:43,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:16:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1155382662, now seen corresponding path program 1 times [2022-01-11 03:16:43,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:16:43,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665894588] [2022-01-11 03:16:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:43,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:16:43,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:16:43,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [172907689] [2022-01-11 03:16:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:43,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:16:43,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:16:43,984 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) [2022-01-11 03:16:44,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-11 03:16:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:16:44,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-11 03:16:44,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:16:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 03:16:44,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 03:16:44,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:16:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665894588] [2022-01-11 03:16:44,310 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:16:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172907689] [2022-01-11 03:16:44,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172907689] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:16:44,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:16:44,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-11 03:16:44,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141840639] [2022-01-11 03:16:44,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:16:44,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-11 03:16:44,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:16:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-11 03:16:44,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-11 03:16:44,312 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-01-11 03:16:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:16:44,547 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2022-01-11 03:16:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-11 03:16:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2022-01-11 03:16:44,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:16:44,549 INFO L225 Difference]: With dead ends: 46 [2022-01-11 03:16:44,549 INFO L226 Difference]: Without dead ends: 28 [2022-01-11 03:16:44,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-11 03:16:44,550 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-11 03:16:44,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 14 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-11 03:16:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-11 03:16:44,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2022-01-11 03:16:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2022-01-11 03:16:44,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-01-11 03:16:44,554 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 18 [2022-01-11 03:16:44,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:16:44,554 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-01-11 03:16:44,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-01-11 03:16:44,555 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-01-11 03:16:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-11 03:16:44,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:16:44,557 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] [2022-01-11 03:16:44,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-11 03:16:44,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:16:44,763 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:16:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:16:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1697631162, now seen corresponding path program 1 times [2022-01-11 03:16:44,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:16:44,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271733094] [2022-01-11 03:16:44,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:44,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:16:44,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:16:44,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228347255] [2022-01-11 03:16:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:44,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:16:44,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:16:44,786 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) [2022-01-11 03:16:44,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-11 03:16:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:16:44,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-11 03:16:44,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:16:44,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-11 03:16:44,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-11 03:16:44,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:16:44,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271733094] [2022-01-11 03:16:44,920 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:16:44,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228347255] [2022-01-11 03:16:44,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228347255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-11 03:16:44,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-11 03:16:44,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-11 03:16:44,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844239766] [2022-01-11 03:16:44,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-11 03:16:44,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-11 03:16:44,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:16:44,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-11 03:16:44,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:16:44,923 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-01-11 03:16:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-11 03:16:45,019 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-01-11 03:16:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-11 03:16:45,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 21 [2022-01-11 03:16:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-11 03:16:45,021 INFO L225 Difference]: With dead ends: 55 [2022-01-11 03:16:45,021 INFO L226 Difference]: Without dead ends: 37 [2022-01-11 03:16:45,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-11 03:16:45,021 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-11 03:16:45,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-11 03:16:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-11 03:16:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-01-11 03:16:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2022-01-11 03:16:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-11 03:16:45,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 21 [2022-01-11 03:16:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-11 03:16:45,025 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-11 03:16:45,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-01-11 03:16:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-11 03:16:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-11 03:16:45,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-11 03:16:45,026 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] [2022-01-11 03:16:45,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-11 03:16:45,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:16:45,227 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-11 03:16:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-11 03:16:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1527624022, now seen corresponding path program 1 times [2022-01-11 03:16:45,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-11 03:16:45,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713527693] [2022-01-11 03:16:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:45,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-11 03:16:45,253 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-11 03:16:45,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120586511] [2022-01-11 03:16:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-11 03:16:45,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-11 03:16:45,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-11 03:16:45,256 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) [2022-01-11 03:16:45,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-11 03:16:45,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-11 03:16:45,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-11 03:16:45,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-11 03:16:45,581 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 44 treesize of output 40 [2022-01-11 03:16:47,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 34 [2022-01-11 03:16:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:16:47,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-11 03:16:47,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 191 [2022-01-11 03:16:47,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 124 [2022-01-11 03:17:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-11 03:17:50,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-11 03:17:50,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713527693] [2022-01-11 03:17:50,648 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-11 03:17:50,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120586511] [2022-01-11 03:17:50,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120586511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-11 03:17:50,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-11 03:17:50,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2022-01-11 03:17:50,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313024536] [2022-01-11 03:17:50,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-11 03:17:50,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-11 03:17:50,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-11 03:17:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-11 03:17:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=149, Unknown=3, NotChecked=0, Total=210 [2022-01-11 03:17:50,650 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 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) [2022-01-11 03:17:52,740 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-01-11 03:17:58,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []