/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/prodbin-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 00:44:00,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 00:44:00,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 00:44:00,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 00:44:00,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 00:44:00,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 00:44:00,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 00:44:00,572 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 00:44:00,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 00:44:00,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 00:44:00,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 00:44:00,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 00:44:00,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 00:44:00,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 00:44:00,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 00:44:00,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 00:44:00,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 00:44:00,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 00:44:00,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 00:44:00,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 00:44:00,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 00:44:00,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 00:44:00,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 00:44:00,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 00:44:00,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 00:44:00,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 00:44:00,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 00:44:00,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 00:44:00,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 00:44:00,600 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 00:44:00,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 00:44:00,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 00:44:00,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 00:44:00,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 00:44:00,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 00:44:00,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 00:44:00,603 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 00:44:00,631 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 00:44:00,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 00:44:00,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 00:44:00,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 00:44:00,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 00:44:00,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 00:44:00,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 00:44:00,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 00:44:00,635 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 00:44:00,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 00:44:00,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 00:44:00,637 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 00:44:00,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 00:44:00,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 00:44:00,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 00:44:00,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 00:44:00,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:44:00,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 00:44:00,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 00:44:00,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 00:44:00,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 00:44:00,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 00:44:00,638 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 00:44:00,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 00:44:00,638 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 00:44:00,638 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 00:44:00,638 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 00:44:00,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 00:44:00,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 00:44:00,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 00:44:00,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 00:44:00,865 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 00:44:00,866 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 00:44:00,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2023-03-31 00:44:01,718 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 00:44:01,909 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 00:44:01,909 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_valuebound20.c [2023-03-31 00:44:01,912 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469958627/e93b61a504fc42158425a843b9fd721d/FLAGb29ef47c2 [2023-03-31 00:44:01,927 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/469958627/e93b61a504fc42158425a843b9fd721d [2023-03-31 00:44:01,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 00:44:01,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 00:44:01,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 00:44:01,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 00:44:01,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 00:44:01,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:44:01" (1/1) ... [2023-03-31 00:44:01,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc5d75a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:01, skipping insertion in model container [2023-03-31 00:44:01,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 12:44:01" (1/1) ... [2023-03-31 00:44:01,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 00:44:01,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 00:44:02,035 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/prodbin-ll_valuebound20.c[537,550] [2023-03-31 00:44:02,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:44:02,054 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 00:44:02,061 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/prodbin-ll_valuebound20.c[537,550] [2023-03-31 00:44:02,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 00:44:02,073 INFO L208 MainTranslator]: Completed translation [2023-03-31 00:44:02,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02 WrapperNode [2023-03-31 00:44:02,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 00:44:02,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 00:44:02,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 00:44:02,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 00:44:02,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,092 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 00:44:02,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 00:44:02,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 00:44:02,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 00:44:02,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (1/1) ... [2023-03-31 00:44:02,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 00:44:02,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:44:02,130 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 00:44:02,136 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 00:44:02,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 00:44:02,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 00:44:02,159 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 00:44:02,159 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 00:44:02,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 00:44:02,160 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 00:44:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 00:44:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 00:44:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 00:44:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 00:44:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 00:44:02,160 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 00:44:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 00:44:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 00:44:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 00:44:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 00:44:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 00:44:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 00:44:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 00:44:02,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 00:44:02,218 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 00:44:02,219 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 00:44:02,335 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 00:44:02,338 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 00:44:02,339 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 00:44:02,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:44:02 BoogieIcfgContainer [2023-03-31 00:44:02,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 00:44:02,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 00:44:02,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 00:44:02,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 00:44:02,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 12:44:01" (1/3) ... [2023-03-31 00:44:02,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cfd800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:44:02, skipping insertion in model container [2023-03-31 00:44:02,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 12:44:02" (2/3) ... [2023-03-31 00:44:02,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cfd800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 12:44:02, skipping insertion in model container [2023-03-31 00:44:02,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 12:44:02" (3/3) ... [2023-03-31 00:44:02,358 INFO L112 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound20.c [2023-03-31 00:44:02,387 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 00:44:02,387 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 00:44:02,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 00:44:02,433 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;@1b8910b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 00:44:02,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 00:44:02,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 00:44:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 00:44:02,441 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:44:02,442 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:44:02,443 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:44:02,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:44:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2023-03-31 00:44:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:44:02,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474438179] [2023-03-31 00:44:02,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:02,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:44:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:44:02,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:44:02,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474438179] [2023-03-31 00:44:02,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-03-31 00:44:02,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971429953] [2023-03-31 00:44:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:02,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:02,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:44:02,539 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 00:44:02,539 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 00:44:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:44:02,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 00:44:02,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:44:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-03-31 00:44:02,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:44:02,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971429953] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:44:02,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:44:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 00:44:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737988845] [2023-03-31 00:44:02,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:44:02,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 00:44:02,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:44:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 00:44:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 00:44:02,671 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 00:44:02,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:44:02,689 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2023-03-31 00:44:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 00:44:02,691 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-03-31 00:44:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:44:02,697 INFO L225 Difference]: With dead ends: 57 [2023-03-31 00:44:02,697 INFO L226 Difference]: Without dead ends: 27 [2023-03-31 00:44:02,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 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 00:44:02,704 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:44:02,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:44:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-03-31 00:44:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-03-31 00:44:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 00:44:02,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-03-31 00:44:02,743 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2023-03-31 00:44:02,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:44:02,744 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-03-31 00:44:02,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-03-31 00:44:02,744 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-03-31 00:44:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 00:44:02,748 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:44:02,748 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:44:02,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 00:44:02,954 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 00:44:02,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:44:02,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:44:02,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2023-03-31 00:44:02,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:44:02,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023170910] [2023-03-31 00:44:02,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:02,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:44:02,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:44:02,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808736412] [2023-03-31 00:44:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:02,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:02,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:44:02,983 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 00:44:02,986 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 00:44:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:44:03,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 00:44:03,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:44:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 00:44:03,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:44:03,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:44:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023170910] [2023-03-31 00:44:03,117 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:44:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808736412] [2023-03-31 00:44:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808736412] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:44:03,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:44:03,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 00:44:03,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122801215] [2023-03-31 00:44:03,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:44:03,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 00:44:03,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:44:03,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 00:44:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 00:44:03,121 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 00:44:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:44:03,186 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-03-31 00:44:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 00:44:03,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2023-03-31 00:44:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:44:03,189 INFO L225 Difference]: With dead ends: 39 [2023-03-31 00:44:03,189 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 00:44:03,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:44:03,192 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:44:03,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 84 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:44:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 00:44:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-03-31 00:44:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:44:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-03-31 00:44:03,201 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2023-03-31 00:44:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:44:03,202 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-03-31 00:44:03,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-03-31 00:44:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-03-31 00:44:03,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-03-31 00:44:03,203 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:44:03,203 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-03-31 00:44:03,209 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 00:44:03,404 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,SelfDestructingSolverStorable1 [2023-03-31 00:44:03,405 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:44:03,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:44:03,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 1 times [2023-03-31 00:44:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:44:03,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801555679] [2023-03-31 00:44:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:44:03,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:44:03,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083327831] [2023-03-31 00:44:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:03,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:44:03,424 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 00:44:03,426 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 00:44:03,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:44:03,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 00:44:03,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:44:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 00:44:03,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 00:44:03,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:44:03,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801555679] [2023-03-31 00:44:03,510 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:44:03,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083327831] [2023-03-31 00:44:03,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083327831] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 00:44:03,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 00:44:03,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 00:44:03,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421061694] [2023-03-31 00:44:03,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 00:44:03,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 00:44:03,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:44:03,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 00:44:03,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 00:44:03,513 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:44:03,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:44:03,572 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-03-31 00:44:03,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 00:44:03,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-03-31 00:44:03,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:44:03,574 INFO L225 Difference]: With dead ends: 43 [2023-03-31 00:44:03,574 INFO L226 Difference]: Without dead ends: 36 [2023-03-31 00:44:03,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-03-31 00:44:03,577 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 00:44:03,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 86 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 00:44:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-31 00:44:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-03-31 00:44:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 00:44:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-03-31 00:44:03,586 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2023-03-31 00:44:03,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:44:03,586 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-03-31 00:44:03,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 00:44:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-03-31 00:44:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 00:44:03,587 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:44:03,588 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-03-31 00:44:03,596 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 00:44:03,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:03,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:44:03,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:44:03,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 1 times [2023-03-31 00:44:03,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:44:03,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282362949] [2023-03-31 00:44:03,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:03,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:44:03,808 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:44:03,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537545930] [2023-03-31 00:44:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:03,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:03,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:44:03,814 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 00:44:03,816 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 00:44:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:44:03,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 00:44:03,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:44:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 00:44:06,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:44:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 00:44:11,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:44:11,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282362949] [2023-03-31 00:44:11,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:44:11,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537545930] [2023-03-31 00:44:11,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537545930] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:44:11,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:44:11,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2023-03-31 00:44:11,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996189341] [2023-03-31 00:44:11,711 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:44:11,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 00:44:11,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:44:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 00:44:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-03-31 00:44:11,712 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 00:44:18,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:44:22,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:44:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:44:22,629 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2023-03-31 00:44:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 00:44:22,630 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2023-03-31 00:44:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:44:22,631 INFO L225 Difference]: With dead ends: 53 [2023-03-31 00:44:22,632 INFO L226 Difference]: Without dead ends: 51 [2023-03-31 00:44:22,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2023-03-31 00:44:22,633 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-03-31 00:44:22,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 159 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-03-31 00:44:22,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-03-31 00:44:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-03-31 00:44:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 00:44:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-03-31 00:44:22,639 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 37 [2023-03-31 00:44:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:44:22,639 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-03-31 00:44:22,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 00:44:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-03-31 00:44:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 00:44:22,640 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:44:22,641 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-03-31 00:44:22,655 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 00:44:22,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:22,841 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:44:22,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:44:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 1 times [2023-03-31 00:44:22,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:44:22,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135581327] [2023-03-31 00:44:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:22,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:44:22,851 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:44:22,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218483545] [2023-03-31 00:44:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:22,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:22,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:44:22,862 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 00:44:22,864 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 00:44:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:44:22,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 00:44:22,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:44:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 00:44:23,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:44:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 00:44:23,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:44:23,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135581327] [2023-03-31 00:44:23,422 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:44:23,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218483545] [2023-03-31 00:44:23,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218483545] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:44:23,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:44:23,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-03-31 00:44:23,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845218543] [2023-03-31 00:44:23,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:44:23,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 00:44:23,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:44:23,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 00:44:23,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-03-31 00:44:23,425 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-31 00:44:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:44:24,454 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2023-03-31 00:44:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-31 00:44:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2023-03-31 00:44:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:44:24,456 INFO L225 Difference]: With dead ends: 83 [2023-03-31 00:44:24,456 INFO L226 Difference]: Without dead ends: 76 [2023-03-31 00:44:24,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2023-03-31 00:44:24,457 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 00:44:24,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 137 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 00:44:24,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-03-31 00:44:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2023-03-31 00:44:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 54 states have internal predecessors, (62), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 00:44:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2023-03-31 00:44:24,468 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 37 [2023-03-31 00:44:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:44:24,468 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2023-03-31 00:44:24,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-03-31 00:44:24,468 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2023-03-31 00:44:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 00:44:24,469 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:44:24,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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 00:44:24,491 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 00:44:24,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:24,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:44:24,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:44:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 1 times [2023-03-31 00:44:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:44:24,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918821749] [2023-03-31 00:44:24,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:24,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:44:24,684 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:44:24,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537754808] [2023-03-31 00:44:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:24,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:24,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:44:24,693 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 00:44:24,697 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 00:44:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:44:24,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-31 00:44:24,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:44:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 00:44:24,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:44:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-31 00:44:25,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:44:25,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918821749] [2023-03-31 00:44:25,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:44:25,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537754808] [2023-03-31 00:44:25,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537754808] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:44:25,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:44:25,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-03-31 00:44:25,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492923190] [2023-03-31 00:44:25,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:44:25,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 00:44:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:44:25,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 00:44:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=82, Unknown=1, NotChecked=0, Total=110 [2023-03-31 00:44:25,325 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-03-31 00:44:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 00:44:25,425 INFO L93 Difference]: Finished difference Result 80 states and 94 transitions. [2023-03-31 00:44:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 00:44:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2023-03-31 00:44:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 00:44:25,427 INFO L225 Difference]: With dead ends: 80 [2023-03-31 00:44:25,427 INFO L226 Difference]: Without dead ends: 73 [2023-03-31 00:44:25,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=113, Unknown=1, NotChecked=0, Total=156 [2023-03-31 00:44:25,428 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 00:44:25,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 00:44:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-03-31 00:44:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-03-31 00:44:25,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 53 states have internal predecessors, (58), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-03-31 00:44:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2023-03-31 00:44:25,435 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 43 [2023-03-31 00:44:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 00:44:25,436 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2023-03-31 00:44:25,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2023-03-31 00:44:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2023-03-31 00:44:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-31 00:44:25,437 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 00:44:25,437 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 00:44:25,451 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 00:44:25,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:25,641 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 00:44:25,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 00:44:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1459553868, now seen corresponding path program 1 times [2023-03-31 00:44:25,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 00:44:25,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978472804] [2023-03-31 00:44:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:25,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 00:44:25,661 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 00:44:25,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460029940] [2023-03-31 00:44:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 00:44:25,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 00:44:25,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 00:44:25,673 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 00:44:25,674 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 00:44:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 00:44:25,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjunts are in the unsatisfiable core [2023-03-31 00:44:25,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 00:44:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 00:44:30,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 00:44:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-03-31 00:44:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 00:44:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978472804] [2023-03-31 00:44:41,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 00:44:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460029940] [2023-03-31 00:44:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460029940] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 00:44:41,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 00:44:41,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2023-03-31 00:44:41,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854974420] [2023-03-31 00:44:41,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 00:44:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 00:44:41,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 00:44:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 00:44:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=377, Unknown=3, NotChecked=0, Total=462 [2023-03-31 00:44:41,521 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 7 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 00:44:43,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:44:45,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:44:47,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:44:53,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-03-31 00:45:11,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []