/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/hard-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:31:10,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:31:10,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:31:11,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 22:31:11,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 22:31:11,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 22:31:11,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 22:31:11,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 22:31:11,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 22:31:11,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 22:31:11,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 22:31:11,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 22:31:11,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 22:31:11,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 22:31:11,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 22:31:11,041 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 22:31:11,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 22:31:11,043 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 22:31:11,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 22:31:11,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 22:31:11,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 22:31:11,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 22:31:11,054 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 22:31:11,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 22:31:11,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-09 22:31:11,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-09 22:31:11,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-09 22:31:11,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-09 22:31:11,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-09 22:31:11,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-09 22:31:11,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-09 22:31:11,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-09 22:31:11,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-09 22:31:11,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-09 22:31:11,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-09 22:31:11,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-09 22:31:11,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-09 22:31:11,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-09 22:31:11,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:31:11,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:31:11,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:31:11,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:31:11,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:31:11,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:31:11,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:31:11,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:31:11,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:31:11,076 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:31:11,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:31:11,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:31:11,077 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:31:11,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:31:11,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:31:11,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:31:11,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:31:11,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:31:11,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:31:11,078 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:31:11,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:31:11,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:31:11,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:31:11,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:31:11,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:31:11,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:31:11,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:31:11,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:31:11,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:31:11,079 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:31:11,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:31:11,079 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:31:11,079 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:31:11,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:31:11,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:31:11,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:31:11,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:31:11,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:31:11,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:31:11,320 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:31:11,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-ll.c [2022-01-09 22:31:11,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0903727/9843dfd2648c4a7083d6bb46953f723a/FLAGb763faab8 [2022-01-09 22:31:11,708 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:31:11,708 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-ll.c [2022-01-09 22:31:11,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0903727/9843dfd2648c4a7083d6bb46953f723a/FLAGb763faab8 [2022-01-09 22:31:11,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c0903727/9843dfd2648c4a7083d6bb46953f723a [2022-01-09 22:31:11,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:31:11,723 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:31:11,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:31:11,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:31:11,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:31:11,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:11,728 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e189514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11, skipping insertion in model container [2022-01-09 22:31:11,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:11,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:31:11,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:31:11,900 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-ll.c[538,551] [2022-01-09 22:31:11,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:31:11,922 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:31:11,931 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-ll.c[538,551] [2022-01-09 22:31:11,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:31:11,952 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:31:11,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11 WrapperNode [2022-01-09 22:31:11,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:31:11,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:31:11,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:31:11,956 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:31:11,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:11,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:11,980 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 56 [2022-01-09 22:31:11,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:31:11,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:31:11,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:31:11,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:31:11,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:11,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:11,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:11,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:12,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:12,004 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:12,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:12,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:31:12,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:31:12,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:31:12,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:31:12,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (1/1) ... [2022-01-09 22:31:12,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:31:12,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:31:12,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 22:31:12,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-09 22:31:12,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:31:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:31:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:31:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:31:12,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-09 22:31:12,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-09 22:31:12,103 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:31:12,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:31:12,238 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:31:12,243 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:31:12,243 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-09 22:31:12,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:31:12 BoogieIcfgContainer [2022-01-09 22:31:12,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:31:12,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:31:12,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:31:12,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:31:12,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:31:11" (1/3) ... [2022-01-09 22:31:12,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f80b396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:31:12, skipping insertion in model container [2022-01-09 22:31:12,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:31:11" (2/3) ... [2022-01-09 22:31:12,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f80b396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:31:12, skipping insertion in model container [2022-01-09 22:31:12,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:31:12" (3/3) ... [2022-01-09 22:31:12,254 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll.c [2022-01-09 22:31:12,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:31:12,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:31:12,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:31:12,309 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-09 22:31:12,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:31:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 22:31:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-09 22:31:12,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:31:12,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:31:12,335 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:31:12,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:31:12,340 INFO L85 PathProgramCache]: Analyzing trace with hash -586848446, now seen corresponding path program 1 times [2022-01-09 22:31:12,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:31:12,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600241127] [2022-01-09 22:31:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:12,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:31:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:31:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:31:12,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:31:12,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600241127] [2022-01-09 22:31:12,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600241127] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:31:12,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:31:12,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:31:12,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531003145] [2022-01-09 22:31:12,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:31:12,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:31:12,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:31:12,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:31:12,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:31:12,529 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:31:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:31:12,557 INFO L93 Difference]: Finished difference Result 49 states and 83 transitions. [2022-01-09 22:31:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:31:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-09 22:31:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:31:12,566 INFO L225 Difference]: With dead ends: 49 [2022-01-09 22:31:12,567 INFO L226 Difference]: Without dead ends: 22 [2022-01-09 22:31:12,570 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 [2022-01-09 22:31:12,574 INFO L933 BasicCegarLoop]: 34 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, 34 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 [2022-01-09 22:31:12,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:31:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-09 22:31:12,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-09 22:31:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:31:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-01-09 22:31:12,605 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 9 [2022-01-09 22:31:12,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:31:12,606 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-01-09 22:31:12,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:31:12,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-01-09 22:31:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-09 22:31:12,607 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:31:12,607 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:31:12,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:31:12,608 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:31:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:31:12,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1188158916, now seen corresponding path program 1 times [2022-01-09 22:31:12,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:31:12,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825137475] [2022-01-09 22:31:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:12,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:31:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:31:12,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:31:12,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:31:12,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825137475] [2022-01-09 22:31:12,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825137475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:31:12,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:31:12,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:31:12,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537397402] [2022-01-09 22:31:12,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:31:12,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:31:12,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:31:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:31:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:31:12,712 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:31:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:31:12,762 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-01-09 22:31:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:31:12,763 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-09 22:31:12,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:31:12,763 INFO L225 Difference]: With dead ends: 35 [2022-01-09 22:31:12,764 INFO L226 Difference]: Without dead ends: 33 [2022-01-09 22:31:12,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:31:12,765 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:31:12,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 98 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:31:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-09 22:31:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-01-09 22:31:12,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:31:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2022-01-09 22:31:12,771 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2022-01-09 22:31:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:31:12,771 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2022-01-09 22:31:12,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:31:12,771 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2022-01-09 22:31:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-09 22:31:12,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:31:12,772 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:31:12,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:31:12,772 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:31:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:31:12,773 INFO L85 PathProgramCache]: Analyzing trace with hash -697944935, now seen corresponding path program 1 times [2022-01-09 22:31:12,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:31:12,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186897463] [2022-01-09 22:31:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:12,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:31:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:31:12,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 22:31:12,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:31:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:31:12,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:31:12,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186897463] [2022-01-09 22:31:12,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186897463] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:31:12,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:31:12,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:31:12,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834828979] [2022-01-09 22:31:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:31:12,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:31:12,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:31:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:31:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:31:12,825 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 22:31:12,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:31:12,863 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-01-09 22:31:12,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:31:12,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-01-09 22:31:12,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:31:12,865 INFO L225 Difference]: With dead ends: 39 [2022-01-09 22:31:12,865 INFO L226 Difference]: Without dead ends: 37 [2022-01-09 22:31:12,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:31:12,866 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:31:12,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 94 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:31:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-09 22:31:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-09 22:31:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 22:31:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-01-09 22:31:12,872 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2022-01-09 22:31:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:31:12,873 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-01-09 22:31:12,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 22:31:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-01-09 22:31:12,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-09 22:31:12,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:31:12,873 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:31:12,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 22:31:12,874 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:31:12,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:31:12,874 INFO L85 PathProgramCache]: Analyzing trace with hash 262992548, now seen corresponding path program 1 times [2022-01-09 22:31:12,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:31:12,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091119639] [2022-01-09 22:31:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:12,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:31:12,883 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:31:12,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132494496] [2022-01-09 22:31:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:12,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:31:12,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:31:12,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:31:12,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:31:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:31:12,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-09 22:31:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:31:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:31:13,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:31:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-09 22:31:13,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:31:13,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091119639] [2022-01-09 22:31:13,344 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:31:13,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132494496] [2022-01-09 22:31:13,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132494496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:31:13,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:31:13,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-01-09 22:31:13,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506950170] [2022-01-09 22:31:13,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:31:13,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-09 22:31:13,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:31:13,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-09 22:31:13,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:31:13,350 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-09 22:31:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:31:13,692 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2022-01-09 22:31:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-09 22:31:13,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 19 [2022-01-09 22:31:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:31:13,696 INFO L225 Difference]: With dead ends: 65 [2022-01-09 22:31:13,697 INFO L226 Difference]: Without dead ends: 50 [2022-01-09 22:31:13,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-01-09 22:31:13,702 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:31:13,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 77 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:31:13,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-09 22:31:13,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-09 22:31:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-09 22:31:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2022-01-09 22:31:13,716 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 19 [2022-01-09 22:31:13,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:31:13,716 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2022-01-09 22:31:13,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-09 22:31:13,717 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2022-01-09 22:31:13,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-09 22:31:13,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:31:13,717 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:31:13,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 22:31:13,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:31:13,932 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:31:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:31:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1807142342, now seen corresponding path program 1 times [2022-01-09 22:31:13,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:31:13,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302209319] [2022-01-09 22:31:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:13,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:31:13,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:31:13,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [48474622] [2022-01-09 22:31:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:13,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:31:13,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:31:13,947 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:31:13,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:31:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:31:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:31:13,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:31:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:31:14,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:31:14,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:31:14,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302209319] [2022-01-09 22:31:14,121 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:31:14,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48474622] [2022-01-09 22:31:14,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48474622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:31:14,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:31:14,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:31:14,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342756716] [2022-01-09 22:31:14,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:31:14,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:31:14,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:31:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:31:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:31:14,123 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:31:14,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:31:14,182 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-01-09 22:31:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:31:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-01-09 22:31:14,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:31:14,187 INFO L225 Difference]: With dead ends: 61 [2022-01-09 22:31:14,187 INFO L226 Difference]: Without dead ends: 54 [2022-01-09 22:31:14,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:31:14,188 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:31:14,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 73 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:31:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-09 22:31:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-01-09 22:31:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-09 22:31:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2022-01-09 22:31:14,201 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 26 [2022-01-09 22:31:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:31:14,202 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2022-01-09 22:31:14,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:31:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2022-01-09 22:31:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-09 22:31:14,205 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:31:14,206 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:31:14,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:31:14,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:31:14,414 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:31:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:31:14,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1034157389, now seen corresponding path program 1 times [2022-01-09 22:31:14,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:31:14,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405466099] [2022-01-09 22:31:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:14,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:31:14,423 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:31:14,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936761391] [2022-01-09 22:31:14,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:31:14,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:31:14,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:31:14,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:31:14,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:31:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:31:14,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-09 22:31:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:31:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-01-09 22:31:15,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:31:49,731 WARN L228 SmtUtils]: Spent 21.16s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)