/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:37:17,043 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:37:17,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:37:17,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-31 00:37:17,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:37:17,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:37:17,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:37:17,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:37:17,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:37:17,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:37:17,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:37:17,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:37:17,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:37:17,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:37:17,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:37:17,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:37:17,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:37:17,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:37:17,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:37:17,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:37:17,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 00:37:17,115 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:37:17,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:37:17,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:37:17,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:37:17,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:37:17,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:37:17,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:37:17,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:37:17,117 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:37:17,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:37:17,118 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:37:17,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:37:17,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:37:17,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:37:17,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:37:17,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:37:17,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:37:17,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:37:17,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:37:17,120 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:37:17,120 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:37:17,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:37:17,120 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:37:17,120 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:37:17,120 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:37:17,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:37:17,120 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:37:17,121 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:37:17,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:37:17,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:37:17,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:37:17,283 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:37:17,283 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:37:17,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c [2023-03-31 00:37:18,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:37:18,611 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:37:18,612 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c [2023-03-31 00:37:18,615 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c0bfb9be/cf4a902da0aa4de68b2356588289b145/FLAG3f66cb670 [2023-03-31 00:37:19,048 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c0bfb9be/cf4a902da0aa4de68b2356588289b145 [2023-03-31 00:37:19,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:37:19,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:37:19,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:37:19,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:37:19,055 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:37:19,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46886f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19, skipping insertion in model container [2023-03-31 00:37:19,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:37:19,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:37:19,163 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c[538,551] [2023-03-31 00:37:19,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:37:19,180 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:37:19,188 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard-ll_unwindbound20.c[538,551] [2023-03-31 00:37:19,192 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:37:19,201 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:37:19,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19 WrapperNode [2023-03-31 00:37:19,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:37:19,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:37:19,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:37:19,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:37:19,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,221 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:37:19,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:37:19,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:37:19,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:37:19,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (1/1) ... [2023-03-31 00:37:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:37:19,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:19,260 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) [2023-03-31 00:37:19,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 00:37:19,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:37:19,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:37:19,301 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:37:19,301 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:37:19,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:37:19,301 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:37:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:37:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:37:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:37:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:37:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 00:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:37:19,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:37:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:37:19,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:37:19,407 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:37:19,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:37:19,619 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:37:19,628 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:37:19,629 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 00:37:19,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:37:19 BoogieIcfgContainer [2023-03-31 00:37:19,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:37:19,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:37:19,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:37:19,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:37:19,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:37:19" (1/3) ... [2023-03-31 00:37:19,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694b9c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:37:19, skipping insertion in model container [2023-03-31 00:37:19,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:37:19" (2/3) ... [2023-03-31 00:37:19,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@694b9c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:37:19, skipping insertion in model container [2023-03-31 00:37:19,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:37:19" (3/3) ... [2023-03-31 00:37:19,651 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.c [2023-03-31 00:37:19,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:37:19,673 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:37:19,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:37:19,726 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@774b7da5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:37:19,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:37:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 00:37:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:37:19,735 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:19,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:19,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:19,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2023-03-31 00:37:19,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:19,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392223670] [2023-03-31 00:37:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:19,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:19,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:19,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392223670] [2023-03-31 00:37:19,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:37:19,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21541190] [2023-03-31 00:37:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:19,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:19,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:19,834 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) [2023-03-31 00:37:19,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 00:37:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:19,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 00:37:19,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:37:19,927 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:37:19,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21541190] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:37:19,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:37:19,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 00:37:19,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829750760] [2023-03-31 00:37:19,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:37:19,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 00:37:19,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:19,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 00:37:19,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:37:19,954 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:37:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:19,968 INFO L93 Difference]: Finished difference Result 65 states and 99 transitions. [2023-03-31 00:37:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 00:37:19,969 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-03-31 00:37:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:19,974 INFO L225 Difference]: With dead ends: 65 [2023-03-31 00:37:19,974 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 00:37:19,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:37:19,978 INFO L413 NwaCegarLoop]: 47 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, 47 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 [2023-03-31 00:37:19,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:37:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 00:37:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 00:37:20,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:37:20,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2023-03-31 00:37:20,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2023-03-31 00:37:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:20,008 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2023-03-31 00:37:20,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:37:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2023-03-31 00:37:20,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 00:37:20,009 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:20,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:20,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 00:37:20,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 00:37:20,214 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:20,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2023-03-31 00:37:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:20,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603887220] [2023-03-31 00:37:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:20,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:37:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:20,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:37:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:37:20,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:20,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603887220] [2023-03-31 00:37:20,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603887220] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:37:20,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:37:20,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:37:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504790559] [2023-03-31 00:37:20,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:37:20,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:37:20,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:20,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:37:20,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:37:20,344 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:37:20,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:20,480 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2023-03-31 00:37:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 00:37:20,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-03-31 00:37:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:20,481 INFO L225 Difference]: With dead ends: 47 [2023-03-31 00:37:20,481 INFO L226 Difference]: Without dead ends: 45 [2023-03-31 00:37:20,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:37:20,502 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:20,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 78 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:37:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-03-31 00:37:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2023-03-31 00:37:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:37:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2023-03-31 00:37:20,513 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2023-03-31 00:37:20,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:20,513 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2023-03-31 00:37:20,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 00:37:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2023-03-31 00:37:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 00:37:20,514 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:20,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:20,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 00:37:20,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:20,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2023-03-31 00:37:20,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:20,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458102477] [2023-03-31 00:37:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:20,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:20,544 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:20,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254264164] [2023-03-31 00:37:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:20,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:20,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:20,545 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) [2023-03-31 00:37:20,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 00:37:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:20,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 00:37:20,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:37:20,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:37:20,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:20,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458102477] [2023-03-31 00:37:20,636 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:20,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254264164] [2023-03-31 00:37:20,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254264164] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:37:20,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:37:20,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:37:20,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718461750] [2023-03-31 00:37:20,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:37:20,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:37:20,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:37:20,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:37:20,639 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:37:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:20,663 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-03-31 00:37:20,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:37:20,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-03-31 00:37:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:20,665 INFO L225 Difference]: With dead ends: 52 [2023-03-31 00:37:20,665 INFO L226 Difference]: Without dead ends: 38 [2023-03-31 00:37:20,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:37:20,666 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 107 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 [2023-03-31 00:37:20,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 107 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:37:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-03-31 00:37:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-03-31 00:37:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:37:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2023-03-31 00:37:20,672 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2023-03-31 00:37:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:20,672 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2023-03-31 00:37:20,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 00:37:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2023-03-31 00:37:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 00:37:20,673 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:20,673 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:20,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 00:37:20,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-03-31 00:37:20,880 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:20,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2023-03-31 00:37:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:20,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533267171] [2023-03-31 00:37:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:20,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:20,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 00:37:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:21,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-31 00:37:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:21,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-03-31 00:37:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 00:37:21,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:21,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533267171] [2023-03-31 00:37:21,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533267171] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:37:21,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:37:21,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:37:21,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228540113] [2023-03-31 00:37:21,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:37:21,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:37:21,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:21,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:37:21,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:37:21,015 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:37:21,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:21,136 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2023-03-31 00:37:21,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 00:37:21,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2023-03-31 00:37:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:21,138 INFO L225 Difference]: With dead ends: 52 [2023-03-31 00:37:21,138 INFO L226 Difference]: Without dead ends: 50 [2023-03-31 00:37:21,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:37:21,141 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:21,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:37:21,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-03-31 00:37:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2023-03-31 00:37:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:37:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-03-31 00:37:21,161 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2023-03-31 00:37:21,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:21,161 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-03-31 00:37:21,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 00:37:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-03-31 00:37:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 00:37:21,163 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:21,163 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:21,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 00:37:21,164 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:21,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2023-03-31 00:37:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122583894] [2023-03-31 00:37:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:21,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:21,174 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:21,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783622006] [2023-03-31 00:37:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:21,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:21,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:21,180 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) [2023-03-31 00:37:21,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 00:37:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:21,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 00:37:21,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:37:21,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:37:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 00:37:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:21,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122583894] [2023-03-31 00:37:21,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:21,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783622006] [2023-03-31 00:37:21,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783622006] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:37:21,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:37:21,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-03-31 00:37:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311787366] [2023-03-31 00:37:21,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:37:21,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 00:37:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 00:37:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-03-31 00:37:21,452 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 00:37:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:21,571 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2023-03-31 00:37:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 00:37:21,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2023-03-31 00:37:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:21,573 INFO L225 Difference]: With dead ends: 83 [2023-03-31 00:37:21,573 INFO L226 Difference]: Without dead ends: 67 [2023-03-31 00:37:21,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-03-31 00:37:21,574 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:21,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 115 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:37:21,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-03-31 00:37:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2023-03-31 00:37:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.236842105263158) internal successors, (47), 41 states have internal predecessors, (47), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 00:37:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2023-03-31 00:37:21,585 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 28 [2023-03-31 00:37:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:21,585 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2023-03-31 00:37:21,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 00:37:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2023-03-31 00:37:21,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 00:37:21,586 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:21,586 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:21,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 00:37:21,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:21,791 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:21,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2023-03-31 00:37:21,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:21,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541144728] [2023-03-31 00:37:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:21,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:21,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:21,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901571726] [2023-03-31 00:37:21,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:21,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:21,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:21,800 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) [2023-03-31 00:37:21,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 00:37:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:21,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:37:21,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 00:37:21,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:37:21,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541144728] [2023-03-31 00:37:21,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:21,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901571726] [2023-03-31 00:37:21,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901571726] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:37:21,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:37:21,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:37:21,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080120160] [2023-03-31 00:37:21,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:37:21,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:37:21,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:21,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:37:21,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:37:21,877 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 00:37:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:21,898 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2023-03-31 00:37:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:37:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-03-31 00:37:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:21,899 INFO L225 Difference]: With dead ends: 80 [2023-03-31 00:37:21,899 INFO L226 Difference]: Without dead ends: 73 [2023-03-31 00:37:21,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:37:21,900 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:21,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 127 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:37:21,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-03-31 00:37:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-03-31 00:37:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 47 states have internal predecessors, (52), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 00:37:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2023-03-31 00:37:21,909 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 36 [2023-03-31 00:37:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:21,909 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2023-03-31 00:37:21,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 00:37:21,910 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2023-03-31 00:37:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 00:37:21,910 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:21,910 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:21,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-03-31 00:37:22,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:22,114 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:22,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2023-03-31 00:37:22,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:22,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044558593] [2023-03-31 00:37:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:22,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:22,122 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:22,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078524821] [2023-03-31 00:37:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:22,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:22,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:22,123 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) [2023-03-31 00:37:22,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 00:37:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:22,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 00:37:22,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 00:37:22,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:37:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 00:37:22,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:22,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044558593] [2023-03-31 00:37:22,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:22,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078524821] [2023-03-31 00:37:22,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078524821] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:37:22,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:37:22,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-03-31 00:37:22,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739313175] [2023-03-31 00:37:22,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:37:22,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 00:37:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:22,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 00:37:22,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:37:22,429 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 00:37:22,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:22,574 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2023-03-31 00:37:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:37:22,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 36 [2023-03-31 00:37:22,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:22,576 INFO L225 Difference]: With dead ends: 84 [2023-03-31 00:37:22,576 INFO L226 Difference]: Without dead ends: 76 [2023-03-31 00:37:22,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2023-03-31 00:37:22,577 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:22,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 129 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:37:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-03-31 00:37:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-03-31 00:37:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.173913043478261) internal successors, (54), 50 states have internal predecessors, (54), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 00:37:22,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2023-03-31 00:37:22,589 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 36 [2023-03-31 00:37:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:22,590 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2023-03-31 00:37:22,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 00:37:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2023-03-31 00:37:22,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 00:37:22,591 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:22,591 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:22,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 00:37:22,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:22,797 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:22,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2023-03-31 00:37:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:22,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758666919] [2023-03-31 00:37:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:22,807 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:22,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877286544] [2023-03-31 00:37:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:22,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:22,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:22,808 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:37:22,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 00:37:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:22,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:37:22,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 00:37:22,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:37:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 00:37:22,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758666919] [2023-03-31 00:37:22,934 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877286544] [2023-03-31 00:37:22,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877286544] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:37:22,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:37:22,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 00:37:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250508148] [2023-03-31 00:37:22,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:37:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 00:37:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 00:37:22,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:37:22,936 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-03-31 00:37:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:23,016 INFO L93 Difference]: Finished difference Result 164 states and 192 transitions. [2023-03-31 00:37:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 00:37:23,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 38 [2023-03-31 00:37:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:23,017 INFO L225 Difference]: With dead ends: 164 [2023-03-31 00:37:23,018 INFO L226 Difference]: Without dead ends: 134 [2023-03-31 00:37:23,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-03-31 00:37:23,019 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:23,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 130 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:37:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-03-31 00:37:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-03-31 00:37:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 87 states have internal predecessors, (94), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-03-31 00:37:23,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2023-03-31 00:37:23,041 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 38 [2023-03-31 00:37:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:23,042 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2023-03-31 00:37:23,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2023-03-31 00:37:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2023-03-31 00:37:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-03-31 00:37:23,043 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:23,043 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:23,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 00:37:23,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:23,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:23,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:23,250 INFO L85 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2023-03-31 00:37:23,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:23,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066522031] [2023-03-31 00:37:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:23,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:23,264 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:23,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214648234] [2023-03-31 00:37:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:23,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:23,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:23,265 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:37:23,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 00:37:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:23,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2023-03-31 00:37:23,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-31 00:37:23,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:37:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-03-31 00:37:23,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:23,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066522031] [2023-03-31 00:37:23,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:23,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214648234] [2023-03-31 00:37:23,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214648234] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:37:23,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:37:23,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-03-31 00:37:23,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039565868] [2023-03-31 00:37:23,414 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:37:23,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 00:37:23,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:23,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 00:37:23,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-31 00:37:23,415 INFO L87 Difference]: Start difference. First operand 128 states and 145 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-03-31 00:37:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:23,530 INFO L93 Difference]: Finished difference Result 232 states and 271 transitions. [2023-03-31 00:37:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 00:37:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) Word has length 54 [2023-03-31 00:37:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:23,532 INFO L225 Difference]: With dead ends: 232 [2023-03-31 00:37:23,532 INFO L226 Difference]: Without dead ends: 216 [2023-03-31 00:37:23,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-03-31 00:37:23,533 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 71 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:23,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 212 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:37:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-03-31 00:37:23,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 209. [2023-03-31 00:37:23,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 137 states have (on average 1.1532846715328466) internal successors, (158), 147 states have internal predecessors, (158), 44 states have call successors, (44), 29 states have call predecessors, (44), 27 states have return successors, (38), 32 states have call predecessors, (38), 38 states have call successors, (38) [2023-03-31 00:37:23,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 240 transitions. [2023-03-31 00:37:23,556 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 240 transitions. Word has length 54 [2023-03-31 00:37:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:23,556 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 240 transitions. [2023-03-31 00:37:23,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 8 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 6 states have call predecessors, (16), 7 states have call successors, (16) [2023-03-31 00:37:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 240 transitions. [2023-03-31 00:37:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 00:37:23,557 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:23,557 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:23,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 00:37:23,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:23,762 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:23,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:23,762 INFO L85 PathProgramCache]: Analyzing trace with hash 608357748, now seen corresponding path program 1 times [2023-03-31 00:37:23,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:23,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488452507] [2023-03-31 00:37:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:23,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:23,787 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:23,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747783650] [2023-03-31 00:37:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:23,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:23,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:23,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:37:23,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 00:37:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:23,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 00:37:23,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:37:23,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:37:23,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:23,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488452507] [2023-03-31 00:37:23,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:23,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747783650] [2023-03-31 00:37:23,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747783650] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:37:23,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:37:23,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 00:37:23,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396800819] [2023-03-31 00:37:23,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:37:23,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 00:37:23,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:23,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 00:37:23,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:37:23,850 INFO L87 Difference]: Start difference. First operand 209 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-03-31 00:37:23,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:23,884 INFO L93 Difference]: Finished difference Result 231 states and 265 transitions. [2023-03-31 00:37:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:37:23,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 65 [2023-03-31 00:37:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:23,885 INFO L225 Difference]: With dead ends: 231 [2023-03-31 00:37:23,885 INFO L226 Difference]: Without dead ends: 211 [2023-03-31 00:37:23,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-03-31 00:37:23,886 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:23,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 104 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:37:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-03-31 00:37:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2023-03-31 00:37:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 138 states have (on average 1.144927536231884) internal successors, (158), 145 states have internal predecessors, (158), 43 states have call successors, (43), 28 states have call predecessors, (43), 27 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2023-03-31 00:37:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 239 transitions. [2023-03-31 00:37:23,906 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 239 transitions. Word has length 65 [2023-03-31 00:37:23,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:23,906 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 239 transitions. [2023-03-31 00:37:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-03-31 00:37:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 239 transitions. [2023-03-31 00:37:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-03-31 00:37:23,907 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:23,907 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:23,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 00:37:24,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 00:37:24,112 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:24,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2023-03-31 00:37:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:24,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689534564] [2023-03-31 00:37:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:24,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:24,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743944192] [2023-03-31 00:37:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:24,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:24,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:24,119 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:37:24,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 00:37:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:24,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 00:37:24,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:37:24,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:37:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-03-31 00:37:29,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:29,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689534564] [2023-03-31 00:37:29,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:29,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743944192] [2023-03-31 00:37:29,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743944192] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:37:29,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:37:29,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2023-03-31 00:37:29,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566816550] [2023-03-31 00:37:29,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:37:29,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-03-31 00:37:29,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:29,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-03-31 00:37:29,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-03-31 00:37:29,105 INFO L87 Difference]: Start difference. First operand 209 states and 239 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-03-31 00:37:33,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:37:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:35,875 INFO L93 Difference]: Finished difference Result 342 states and 417 transitions. [2023-03-31 00:37:35,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-31 00:37:35,875 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 68 [2023-03-31 00:37:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:35,876 INFO L225 Difference]: With dead ends: 342 [2023-03-31 00:37:35,876 INFO L226 Difference]: Without dead ends: 281 [2023-03-31 00:37:35,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2023-03-31 00:37:35,877 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:35,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 276 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 00:37:35,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-03-31 00:37:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 252. [2023-03-31 00:37:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 170 states have (on average 1.1647058823529413) internal successors, (198), 178 states have internal predecessors, (198), 51 states have call successors, (51), 32 states have call predecessors, (51), 30 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2023-03-31 00:37:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 295 transitions. [2023-03-31 00:37:35,927 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 295 transitions. Word has length 68 [2023-03-31 00:37:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:35,927 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 295 transitions. [2023-03-31 00:37:35,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 16 states have internal predecessors, (43), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2023-03-31 00:37:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 295 transitions. [2023-03-31 00:37:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-03-31 00:37:35,928 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:35,928 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:35,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 00:37:36,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:36,133 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:36,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2023-03-31 00:37:36,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:36,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82668878] [2023-03-31 00:37:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:36,141 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:36,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316270854] [2023-03-31 00:37:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:36,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:36,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:36,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:37:36,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 00:37:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:37:36,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 00:37:36,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:37:36,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:37:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:37:37,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:37,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82668878] [2023-03-31 00:37:37,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:37,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316270854] [2023-03-31 00:37:37,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316270854] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:37:37,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:37:37,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2023-03-31 00:37:37,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208532220] [2023-03-31 00:37:37,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:37:37,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-03-31 00:37:37,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-03-31 00:37:37,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:37:37,701 INFO L87 Difference]: Start difference. First operand 252 states and 295 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2023-03-31 00:37:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:40,953 INFO L93 Difference]: Finished difference Result 379 states and 463 transitions. [2023-03-31 00:37:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 00:37:40,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 79 [2023-03-31 00:37:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:40,955 INFO L225 Difference]: With dead ends: 379 [2023-03-31 00:37:40,955 INFO L226 Difference]: Without dead ends: 302 [2023-03-31 00:37:40,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2023-03-31 00:37:40,957 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 78 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:40,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 338 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-03-31 00:37:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-03-31 00:37:41,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 279. [2023-03-31 00:37:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 188 states have (on average 1.1542553191489362) internal successors, (217), 194 states have internal predecessors, (217), 57 states have call successors, (57), 34 states have call predecessors, (57), 33 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2023-03-31 00:37:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 327 transitions. [2023-03-31 00:37:41,009 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 327 transitions. Word has length 79 [2023-03-31 00:37:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:41,010 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 327 transitions. [2023-03-31 00:37:41,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2023-03-31 00:37:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 327 transitions. [2023-03-31 00:37:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 00:37:41,011 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:41,011 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:41,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-03-31 00:37:41,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-03-31 00:37:41,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:41,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:41,215 INFO L85 PathProgramCache]: Analyzing trace with hash 437079945, now seen corresponding path program 2 times [2023-03-31 00:37:41,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:41,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637285789] [2023-03-31 00:37:41,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:41,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:41,230 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:41,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467942406] [2023-03-31 00:37:41,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-31 00:37:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:41,232 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:37:41,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-31 00:37:41,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-31 00:37:41,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:37:41,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:37:41,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:37:41,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:37:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 27 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-03-31 00:37:41,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:37:41,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637285789] [2023-03-31 00:37:41,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:37:41,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467942406] [2023-03-31 00:37:41,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467942406] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:37:41,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:37:41,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2023-03-31 00:37:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772043911] [2023-03-31 00:37:41,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:37:41,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:37:41,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:37:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:37:41,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:37:41,416 INFO L87 Difference]: Start difference. First operand 279 states and 327 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-03-31 00:37:41,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:37:41,512 INFO L93 Difference]: Finished difference Result 316 states and 375 transitions. [2023-03-31 00:37:41,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 00:37:41,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 82 [2023-03-31 00:37:41,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:37:41,514 INFO L225 Difference]: With dead ends: 316 [2023-03-31 00:37:41,514 INFO L226 Difference]: Without dead ends: 237 [2023-03-31 00:37:41,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:37:41,515 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:37:41,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 155 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:37:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2023-03-31 00:37:41,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2023-03-31 00:37:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 159 states have (on average 1.1446540880503144) internal successors, (182), 164 states have internal predecessors, (182), 48 states have call successors, (48), 30 states have call predecessors, (48), 29 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2023-03-31 00:37:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 275 transitions. [2023-03-31 00:37:41,560 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 275 transitions. Word has length 82 [2023-03-31 00:37:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:37:41,561 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 275 transitions. [2023-03-31 00:37:41,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2023-03-31 00:37:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 275 transitions. [2023-03-31 00:37:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 00:37:41,561 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:37:41,562 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:37:41,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-03-31 00:37:41,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-31 00:37:41,766 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:37:41,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:37:41,766 INFO L85 PathProgramCache]: Analyzing trace with hash -543991253, now seen corresponding path program 3 times [2023-03-31 00:37:41,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:37:41,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874851283] [2023-03-31 00:37:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:37:41,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:37:41,777 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:37:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585826264] [2023-03-31 00:37:41,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 00:37:41,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:37:41,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:37:41,794 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 00:37:41,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-31 00:37:41,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 00:37:41,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 00:37:41,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 50 conjunts are in the unsatisfiable core [2023-03-31 00:37:41,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:37:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 55 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-31 00:37:42,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:38:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 37 proven. 53 refuted. 2 times theorem prover too weak. 276 trivial. 0 not checked. [2023-03-31 00:38:28,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:38:28,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874851283] [2023-03-31 00:38:28,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:38:28,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585826264] [2023-03-31 00:38:28,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585826264] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:38:28,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:38:28,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-03-31 00:38:28,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071172933] [2023-03-31 00:38:28,235 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:38:28,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-31 00:38:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:38:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-31 00:38:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=465, Unknown=1, NotChecked=0, Total=552 [2023-03-31 00:38:28,236 INFO L87 Difference]: Start difference. First operand 237 states and 275 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 22 states have internal predecessors, (62), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 11 states have call predecessors, (29), 10 states have call successors, (29)