/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 22:15:12,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 22:15:12,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 22:15:12,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 22:15:12,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 22:15:12,282 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 22:15:12,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 22:15:12,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 22:15:12,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 22:15:12,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 22:15:12,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 22:15:12,298 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 22:15:12,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 22:15:12,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 22:15:12,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 22:15:12,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 22:15:12,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 22:15:12,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 22:15:12,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 22:15:12,312 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 22:15:12,313 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 22:15:12,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 22:15:12,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 22:15:12,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 22:15:12,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 22:15:12,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 22:15:12,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 22:15:12,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 22:15:12,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 22:15:12,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 22:15:12,348 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 22:15:12,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 22:15:12,350 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 22:15:12,350 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 22:15:12,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 22:15:12,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 22:15:12,351 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 22:15:12,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 22:15:12,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 22:15:12,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 22:15:12,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 22:15:12,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 22:15:12,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 22:15:12,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 22:15:12,352 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 22:15:12,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 22:15:12,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 22:15:12,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 22:15:12,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 22:15:12,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:15:12,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 22:15:12,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 22:15:12,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 22:15:12,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 22:15:12,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 22:15:12,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 22:15:12,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 22:15:12,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 22:15:12,354 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 22:15:12,354 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 22:15:12,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 22:15:12,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 22:15:12,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 22:15:12,586 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 22:15:12,586 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 22:15:12,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-03-18 22:15:12,639 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43160df9/058fb759335d4f8faf5859c0f6575125/FLAGfc8e5121b [2022-03-18 22:15:12,999 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 22:15:13,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-03-18 22:15:13,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43160df9/058fb759335d4f8faf5859c0f6575125/FLAGfc8e5121b [2022-03-18 22:15:13,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43160df9/058fb759335d4f8faf5859c0f6575125 [2022-03-18 22:15:13,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 22:15:13,026 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 22:15:13,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 22:15:13,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 22:15:13,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 22:15:13,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e8e0293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13, skipping insertion in model container [2022-03-18 22:15:13,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 22:15:13,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 22:15:13,245 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2022-03-18 22:15:13,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:15:13,266 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 22:15:13,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2022-03-18 22:15:13,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 22:15:13,287 INFO L208 MainTranslator]: Completed translation [2022-03-18 22:15:13,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13 WrapperNode [2022-03-18 22:15:13,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 22:15:13,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 22:15:13,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 22:15:13,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 22:15:13,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 22:15:13,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 22:15:13,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 22:15:13,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 22:15:13,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 22:15:13,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:13,343 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 22:15:13,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 22:15:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 22:15:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 22:15:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 22:15:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 22:15:13,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 22:15:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 22:15:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 22:15:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 22:15:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 22:15:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 22:15:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 22:15:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 22:15:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 22:15:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 22:15:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 22:15:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 22:15:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 22:15:13,453 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 22:15:13,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 22:15:13,563 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 22:15:13,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 22:15:13,568 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 22:15:13,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:15:13 BoogieIcfgContainer [2022-03-18 22:15:13,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 22:15:13,571 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 22:15:13,571 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 22:15:13,587 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 22:15:13,590 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:15:13" (1/1) ... [2022-03-18 22:15:13,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:15:13 BasicIcfg [2022-03-18 22:15:13,600 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 22:15:13,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 22:15:13,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 22:15:13,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 22:15:13,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 10:15:13" (1/4) ... [2022-03-18 22:15:13,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bcfdca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:15:13, skipping insertion in model container [2022-03-18 22:15:13,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 10:15:13" (2/4) ... [2022-03-18 22:15:13,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bcfdca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 10:15:13, skipping insertion in model container [2022-03-18 22:15:13,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 10:15:13" (3/4) ... [2022-03-18 22:15:13,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12bcfdca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 10:15:13, skipping insertion in model container [2022-03-18 22:15:13,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 10:15:13" (4/4) ... [2022-03-18 22:15:13,606 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.cqvasr [2022-03-18 22:15:13,626 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 22:15:13,627 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 22:15:13,693 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 22:15:13,698 INFO L340 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=FINITE_AUTOMATA, 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 [2022-03-18 22:15:13,699 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 22:15:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 22:15:13,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 22:15:13,725 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:13,725 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:13,725 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:13,731 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-03-18 22:15:13,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:13,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966164721] [2022-03-18 22:15:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:13,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:13,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:15:13,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:13,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966164721] [2022-03-18 22:15:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966164721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:15:13,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:15:13,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 22:15:13,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865113065] [2022-03-18 22:15:13,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:15:13,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 22:15:13,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:13,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 22:15:13,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:15:13,944 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:13,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:13,983 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 22:15:13,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 22:15:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 22:15:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:13,991 INFO L225 Difference]: With dead ends: 32 [2022-03-18 22:15:13,991 INFO L226 Difference]: Without dead ends: 13 [2022-03-18 22:15:13,996 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 22:15:13,999 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:14,001 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:15:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-18 22:15:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-18 22:15:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-18 22:15:14,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-18 22:15:14,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:14,033 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-18 22:15:14,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:14,034 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-18 22:15:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-18 22:15:14,035 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:14,035 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:14,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 22:15:14,036 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-03-18 22:15:14,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:14,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306060262] [2022-03-18 22:15:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:14,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:14,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:15:14,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:14,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306060262] [2022-03-18 22:15:14,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306060262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 22:15:14,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 22:15:14,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 22:15:14,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107078799] [2022-03-18 22:15:14,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 22:15:14,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 22:15:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 22:15:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 22:15:14,117 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:14,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:14,158 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-18 22:15:14,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 22:15:14,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-18 22:15:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:14,160 INFO L225 Difference]: With dead ends: 22 [2022-03-18 22:15:14,160 INFO L226 Difference]: Without dead ends: 15 [2022-03-18 22:15:14,160 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 22:15:14,161 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:14,161 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:15:14,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-18 22:15:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-18 22:15:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-18 22:15:14,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-18 22:15:14,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:14,165 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-18 22:15:14,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-18 22:15:14,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-18 22:15:14,166 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:14,166 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:14,166 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 22:15:14,166 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:14,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:14,167 INFO L85 PathProgramCache]: Analyzing trace with hash -521762940, now seen corresponding path program 1 times [2022-03-18 22:15:14,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208322083] [2022-03-18 22:15:14,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:14,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:14,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:15:14,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208322083] [2022-03-18 22:15:14,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208322083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624332736] [2022-03-18 22:15:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:14,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:14,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:14,227 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:15:14,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 22:15:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:14,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 22:15:14,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:15:14,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 22:15:14,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624332736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:14,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:14,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 22:15:14,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130171006] [2022-03-18 22:15:14,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:14,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 22:15:14,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 22:15:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 22:15:14,408 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:14,480 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-03-18 22:15:14,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 22:15:14,480 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-18 22:15:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:14,481 INFO L225 Difference]: With dead ends: 27 [2022-03-18 22:15:14,481 INFO L226 Difference]: Without dead ends: 20 [2022-03-18 22:15:14,481 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 22:15:14,482 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:14,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:15:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-18 22:15:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-18 22:15:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:14,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-18 22:15:14,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-03-18 22:15:14,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:14,486 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-18 22:15:14,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-18 22:15:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-18 22:15:14,487 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:14,487 INFO L500 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:14,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 22:15:14,706 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:14,706 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:14,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:14,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1491075900, now seen corresponding path program 1 times [2022-03-18 22:15:14,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:14,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868819960] [2022-03-18 22:15:14,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:14,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:14,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:15:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868819960] [2022-03-18 22:15:14,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868819960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14664808] [2022-03-18 22:15:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:14,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:14,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:14,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:15:14,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 22:15:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:14,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 22:15:14,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:15:14,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:15:14,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14664808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:14,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:14,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 22:15:14,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51947191] [2022-03-18 22:15:14,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:14,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 22:15:14,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:14,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 22:15:14,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 22:15:14,973 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:15,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:15,062 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-03-18 22:15:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 22:15:15,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-18 22:15:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:15,063 INFO L225 Difference]: With dead ends: 38 [2022-03-18 22:15:15,063 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 22:15:15,064 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 22:15:15,064 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:15,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:15:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 22:15:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 22:15:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-18 22:15:15,069 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-18 22:15:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:15,070 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-18 22:15:15,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-18 22:15:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 22:15:15,070 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:15,071 INFO L500 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:15,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 22:15:15,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-18 22:15:15,277 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:15,278 INFO L85 PathProgramCache]: Analyzing trace with hash 44690740, now seen corresponding path program 2 times [2022-03-18 22:15:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:15,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245621447] [2022-03-18 22:15:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:15,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:15,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:15:15,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245621447] [2022-03-18 22:15:15,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245621447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346340211] [2022-03-18 22:15:15,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:15:15,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:15,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:15,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:15:15,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 22:15:15,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:15:15,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:15:15,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 22:15:15,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:15:15,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:15:15,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346340211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:15,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:15,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-18 22:15:15,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200273961] [2022-03-18 22:15:15,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:15,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 22:15:15,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:15,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 22:15:15,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-18 22:15:15,617 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:15,825 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-18 22:15:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 22:15:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-18 22:15:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:15,826 INFO L225 Difference]: With dead ends: 54 [2022-03-18 22:15:15,826 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 22:15:15,827 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-18 22:15:15,828 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:15,828 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 22:15:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 22:15:15,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-18 22:15:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-18 22:15:15,833 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-18 22:15:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:15,833 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-18 22:15:15,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-18 22:15:15,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 22:15:15,834 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:15,834 INFO L500 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:15,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 22:15:16,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:16,049 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1982683428, now seen corresponding path program 3 times [2022-03-18 22:15:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:16,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567841871] [2022-03-18 22:15:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:16,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:16,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 22:15:16,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:16,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567841871] [2022-03-18 22:15:16,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567841871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:16,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713392606] [2022-03-18 22:15:16,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:15:16,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:16,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:16,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:15:16,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 22:15:16,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 22:15:16,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:15:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 22:15:16,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:16,466 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 22:15:16,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:16,625 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 22:15:16,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713392606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:16,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:16,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 28 [2022-03-18 22:15:16,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988278459] [2022-03-18 22:15:16,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:16,626 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 22:15:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:16,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 22:15:16,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-18 22:15:16,627 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:17,115 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-03-18 22:15:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 22:15:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-18 22:15:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:17,117 INFO L225 Difference]: With dead ends: 88 [2022-03-18 22:15:17,117 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 22:15:17,118 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=2231, Unknown=0, NotChecked=0, Total=2970 [2022-03-18 22:15:17,118 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:17,119 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 52 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:15:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 22:15:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-03-18 22:15:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-18 22:15:17,125 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2022-03-18 22:15:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:17,125 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-18 22:15:17,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-18 22:15:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-18 22:15:17,126 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:17,126 INFO L500 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:17,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 22:15:17,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:17,327 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:17,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2103021866, now seen corresponding path program 4 times [2022-03-18 22:15:17,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:17,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343278505] [2022-03-18 22:15:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:17,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:17,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:15:17,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:17,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343278505] [2022-03-18 22:15:17,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343278505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:17,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685276552] [2022-03-18 22:15:17,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:15:17,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:17,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:17,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 22:15:17,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 22:15:17,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:15:17,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:15:17,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 22:15:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:15:17,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:15:18,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685276552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:18,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:18,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-18 22:15:18,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776165684] [2022-03-18 22:15:18,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:18,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 22:15:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:18,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 22:15:18,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 22:15:18,081 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:18,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:18,678 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2022-03-18 22:15:18,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 22:15:18,678 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-18 22:15:18,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:18,679 INFO L225 Difference]: With dead ends: 104 [2022-03-18 22:15:18,679 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 22:15:18,681 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 22:15:18,681 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:18,681 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 22:15:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 22:15:18,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-18 22:15:18,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:18,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-03-18 22:15:18,695 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2022-03-18 22:15:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:18,695 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-03-18 22:15:18,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:18,695 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-03-18 22:15:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 22:15:18,697 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:18,697 INFO L500 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:18,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 22:15:18,916 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:18,917 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:18,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1986185996, now seen corresponding path program 5 times [2022-03-18 22:15:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:18,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438339996] [2022-03-18 22:15:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:19,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:15:19,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438339996] [2022-03-18 22:15:19,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438339996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:19,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288643560] [2022-03-18 22:15:19,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:15:19,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:19,422 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) [2022-03-18 22:15:19,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 22:15:19,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-18 22:15:19,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:15:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 22:15:19,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:19,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:15:19,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:15:20,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288643560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:20,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:20,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-18 22:15:20,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275919124] [2022-03-18 22:15:20,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:20,921 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 22:15:20,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:20,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 22:15:20,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 22:15:20,923 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:22,606 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2022-03-18 22:15:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-18 22:15:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-18 22:15:22,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:22,612 INFO L225 Difference]: With dead ends: 172 [2022-03-18 22:15:22,612 INFO L226 Difference]: Without dead ends: 156 [2022-03-18 22:15:22,615 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-18 22:15:22,617 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:22,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 34 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:15:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-18 22:15:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-18 22:15:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2022-03-18 22:15:22,629 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 87 [2022-03-18 22:15:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:22,630 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2022-03-18 22:15:22,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2022-03-18 22:15:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-18 22:15:22,648 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:22,648 INFO L500 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:22,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-18 22:15:22,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:22,849 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1296796336, now seen corresponding path program 6 times [2022-03-18 22:15:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:22,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908512646] [2022-03-18 22:15:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:22,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:23,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 22:15:23,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:23,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908512646] [2022-03-18 22:15:23,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908512646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:23,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678627087] [2022-03-18 22:15:23,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 22:15:23,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:23,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:23,969 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) [2022-03-18 22:15:23,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 22:15:24,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-03-18 22:15:24,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:15:24,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 22:15:24,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-18 22:15:24,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-18 22:15:25,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678627087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:25,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:25,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 12, 12] total 88 [2022-03-18 22:15:25,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166457957] [2022-03-18 22:15:25,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:25,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 22:15:25,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 22:15:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2484, Invalid=5172, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 22:15:25,047 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:27,866 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2022-03-18 22:15:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 22:15:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-18 22:15:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:27,869 INFO L225 Difference]: With dead ends: 230 [2022-03-18 22:15:27,869 INFO L226 Difference]: Without dead ends: 204 [2022-03-18 22:15:27,874 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5540 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=9439, Invalid=22423, Unknown=0, NotChecked=0, Total=31862 [2022-03-18 22:15:27,876 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 308 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:27,876 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 77 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 22:15:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-18 22:15:27,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 174. [2022-03-18 22:15:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 169 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 188 transitions. [2022-03-18 22:15:27,900 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 188 transitions. Word has length 155 [2022-03-18 22:15:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:27,901 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 188 transitions. [2022-03-18 22:15:27,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 188 transitions. [2022-03-18 22:15:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-18 22:15:27,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:27,903 INFO L500 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:27,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 22:15:28,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:28,120 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash -140127658, now seen corresponding path program 7 times [2022-03-18 22:15:28,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:28,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488048442] [2022-03-18 22:15:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:28,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:29,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:15:29,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488048442] [2022-03-18 22:15:29,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488048442] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:29,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115843921] [2022-03-18 22:15:29,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 22:15:29,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:29,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:29,170 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) [2022-03-18 22:15:29,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 22:15:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 22:15:29,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:15:29,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:15:33,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115843921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:33,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:33,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-18 22:15:33,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411458883] [2022-03-18 22:15:33,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:33,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-18 22:15:33,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:33,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-18 22:15:33,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-18 22:15:33,770 INFO L87 Difference]: Start difference. First operand 174 states and 188 transitions. Second operand has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:15:38,123 INFO L93 Difference]: Finished difference Result 344 states and 440 transitions. [2022-03-18 22:15:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-18 22:15:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-18 22:15:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:15:38,125 INFO L225 Difference]: With dead ends: 344 [2022-03-18 22:15:38,125 INFO L226 Difference]: Without dead ends: 312 [2022-03-18 22:15:38,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-18 22:15:38,133 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 22:15:38,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 34 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 22:15:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-18 22:15:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-03-18 22:15:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.0488599348534202) internal successors, (322), 307 states have internal predecessors, (322), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2022-03-18 22:15:38,154 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 173 [2022-03-18 22:15:38,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:15:38,155 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2022-03-18 22:15:38,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:15:38,155 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2022-03-18 22:15:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-18 22:15:38,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:15:38,164 INFO L500 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:15:38,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 22:15:38,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 22:15:38,379 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:15:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:15:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1017097204, now seen corresponding path program 8 times [2022-03-18 22:15:38,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:15:38,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403822974] [2022-03-18 22:15:38,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:15:38,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:15:38,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:42,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:15:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:15:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:15:43,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:15:43,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403822974] [2022-03-18 22:15:43,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403822974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:15:43,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154602155] [2022-03-18 22:15:43,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 22:15:43,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:15:43,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:15:43,011 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) [2022-03-18 22:15:43,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 22:15:43,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 22:15:43,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:15:43,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-18 22:15:43,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:15:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:15:43,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:15:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:15:54,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154602155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:15:54,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:15:54,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-18 22:15:54,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165838048] [2022-03-18 22:15:54,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:15:54,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-18 22:15:54,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:15:54,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-18 22:15:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-18 22:15:54,205 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:16:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:16:12,270 INFO L93 Difference]: Finished difference Result 620 states and 785 transitions. [2022-03-18 22:16:12,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-18 22:16:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-03-18 22:16:12,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:16:12,278 INFO L225 Difference]: With dead ends: 620 [2022-03-18 22:16:12,278 INFO L226 Difference]: Without dead ends: 588 [2022-03-18 22:16:12,291 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-18 22:16:12,292 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 22:16:12,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 49 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 22:16:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-18 22:16:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2022-03-18 22:16:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.0257289879931388) internal successors, (598), 583 states have internal predecessors, (598), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:16:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 602 transitions. [2022-03-18 22:16:12,327 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 602 transitions. Word has length 311 [2022-03-18 22:16:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:16:12,327 INFO L478 AbstractCegarLoop]: Abstraction has 588 states and 602 transitions. [2022-03-18 22:16:12,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:16:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 602 transitions. [2022-03-18 22:16:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-03-18 22:16:12,360 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:16:12,360 INFO L500 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:16:12,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 22:16:12,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:16:12,561 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:16:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:16:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash -845736712, now seen corresponding path program 9 times [2022-03-18 22:16:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:16:12,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333065260] [2022-03-18 22:16:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:16:12,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:16:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:16:28,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:16:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:16:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 22:16:28,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:16:28,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333065260] [2022-03-18 22:16:28,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333065260] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:16:28,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254155478] [2022-03-18 22:16:28,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 22:16:28,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:16:28,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:16:28,119 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) [2022-03-18 22:16:28,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 22:16:28,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-18 22:16:28,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:16:28,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 22:16:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:16:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-18 22:16:29,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:16:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-18 22:16:31,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254155478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:16:31,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:16:31,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 20, 20] total 312 [2022-03-18 22:16:31,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777433766] [2022-03-18 22:16:31,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:16:31,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 312 states [2022-03-18 22:16:31,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:16:31,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 312 interpolants. [2022-03-18 22:16:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38748, Invalid=58284, Unknown=0, NotChecked=0, Total=97032 [2022-03-18 22:16:31,683 INFO L87 Difference]: Start difference. First operand 588 states and 602 transitions. Second operand has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:16:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:16:59,725 INFO L93 Difference]: Finished difference Result 726 states and 805 transitions. [2022-03-18 22:16:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2022-03-18 22:16:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2022-03-18 22:16:59,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:16:59,734 INFO L225 Difference]: With dead ends: 726 [2022-03-18 22:16:59,734 INFO L226 Difference]: Without dead ends: 676 [2022-03-18 22:16:59,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1775 GetRequests, 1141 SyntacticMatches, 1 SemanticMatches, 633 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62316 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=133171, Invalid=269419, Unknown=0, NotChecked=0, Total=402590 [2022-03-18 22:16:59,754 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 804 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 1449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1449 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 22:16:59,755 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 82 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1449 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 22:16:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-18 22:16:59,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 622. [2022-03-18 22:16:59,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 617 states have (on average 1.0502431118314424) internal successors, (648), 617 states have internal predecessors, (648), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:16:59,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 652 transitions. [2022-03-18 22:16:59,777 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 652 transitions. Word has length 587 [2022-03-18 22:16:59,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:16:59,777 INFO L478 AbstractCegarLoop]: Abstraction has 622 states and 652 transitions. [2022-03-18 22:16:59,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:16:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 652 transitions. [2022-03-18 22:16:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-03-18 22:16:59,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:16:59,781 INFO L500 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:16:59,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-18 22:16:59,998 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 22:16:59,999 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:16:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:16:59,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1496477562, now seen corresponding path program 10 times [2022-03-18 22:16:59,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:16:59,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498457538] [2022-03-18 22:16:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:16:59,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:17:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:17:14,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:17:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:17:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:17:14,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:17:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498457538] [2022-03-18 22:17:14,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498457538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:17:14,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025403087] [2022-03-18 22:17:14,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 22:17:14,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:17:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:17:14,291 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) [2022-03-18 22:17:14,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 22:17:14,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 22:17:14,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:17:14,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-18 22:17:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:17:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:17:15,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:18:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:18:05,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025403087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:18:05,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:18:05,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-18 22:18:05,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623728001] [2022-03-18 22:18:05,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:18:05,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-18 22:18:05,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:18:05,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-18 22:18:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-18 22:18:05,834 INFO L87 Difference]: Start difference. First operand 622 states and 652 transitions. Second operand has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:19:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:19:17,772 INFO L93 Difference]: Finished difference Result 1240 states and 1576 transitions. [2022-03-18 22:19:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-18 22:19:17,773 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-03-18 22:19:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:19:17,777 INFO L225 Difference]: With dead ends: 1240 [2022-03-18 22:19:17,777 INFO L226 Difference]: Without dead ends: 1176 [2022-03-18 22:19:17,839 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 128.1s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-18 22:19:17,840 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 560 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 22:19:17,840 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 39 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 22:19:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-18 22:19:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-03-18 22:19:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1171 states have (on average 1.026473099914603) internal successors, (1202), 1171 states have internal predecessors, (1202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:19:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1206 transitions. [2022-03-18 22:19:17,867 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1206 transitions. Word has length 621 [2022-03-18 22:19:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:19:17,868 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1206 transitions. [2022-03-18 22:19:17,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:19:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1206 transitions. [2022-03-18 22:19:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2022-03-18 22:19:17,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:19:17,879 INFO L500 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:19:17,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-18 22:19:18,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 22:19:18,104 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:19:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:19:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1282836636, now seen corresponding path program 11 times [2022-03-18 22:19:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:19:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97226038] [2022-03-18 22:19:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:19:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:19:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:20:22,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 22:20:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 22:20:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:20:22,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 22:20:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97226038] [2022-03-18 22:20:22,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97226038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 22:20:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702232429] [2022-03-18 22:20:22,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 22:20:22,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 22:20:22,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 22:20:22,292 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) [2022-03-18 22:20:22,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 22:20:24,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-18 22:20:24,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 22:20:24,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-18 22:20:24,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 22:20:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:20:25,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 22:23:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-18 22:23:23,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702232429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 22:23:23,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 22:23:23,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-18 22:23:23,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457703306] [2022-03-18 22:23:23,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 22:23:23,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-18 22:23:23,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 22:23:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-18 22:23:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-18 22:23:23,570 INFO L87 Difference]: Start difference. First operand 1176 states and 1206 transitions. Second operand has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 22:29:13,616 INFO L93 Difference]: Finished difference Result 2348 states and 2961 transitions. [2022-03-18 22:29:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1109 states. [2022-03-18 22:29:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1175 [2022-03-18 22:29:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 22:29:13,642 INFO L225 Difference]: With dead ends: 2348 [2022-03-18 22:29:13,642 INFO L226 Difference]: Without dead ends: 2284 [2022-03-18 22:29:14,066 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4012 GetRequests, 1798 SyntacticMatches, 0 SemanticMatches, 2214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767005 ImplicationChecksByTransitivity, 526.4s TimeCoverageRelationStatistics Valid=1840943, Invalid=3067497, Unknown=0, NotChecked=0, Total=4908440 [2022-03-18 22:29:14,067 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 1114 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2253 mSolverCounterSat, 1672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1672 IncrementalHoareTripleChecker+Valid, 2253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-18 22:29:14,067 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1114 Valid, 44 Invalid, 3925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1672 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-18 22:29:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2022-03-18 22:29:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2284. [2022-03-18 22:29:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2279 states have (on average 1.0136024572180782) internal successors, (2310), 2279 states have internal predecessors, (2310), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:14,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2314 transitions. [2022-03-18 22:29:14,151 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2314 transitions. Word has length 1175 [2022-03-18 22:29:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 22:29:14,152 INFO L478 AbstractCegarLoop]: Abstraction has 2284 states and 2314 transitions. [2022-03-18 22:29:14,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 22:29:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2314 transitions. [2022-03-18 22:29:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2284 [2022-03-18 22:29:14,187 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 22:29:14,187 INFO L500 BasicCegarLoop]: trace histogram [1136, 1106, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 22:29:14,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 22:29:14,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 22:29:14,403 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 22:29:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 22:29:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1348396616, now seen corresponding path program 12 times [2022-03-18 22:29:14,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 22:29:14,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369117673] [2022-03-18 22:29:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 22:29:14,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 22:29:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat