/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/loop-acceleration/phases_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 05:06:48,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 05:06:48,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 05:06:48,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 05:06:48,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 05:06:48,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 05:06:48,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 05:06:48,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 05:06:48,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 05:06:48,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 05:06:48,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 05:06:48,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 05:06:48,979 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 05:06:48,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 05:06:48,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 05:06:48,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 05:06:48,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 05:06:48,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-05 05:06:48,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 05:06:48,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 05:06:48,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 05:06:48,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-04-05 05:06:49,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 05:06:49,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 05:06:49,014 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-04-05 05:06:49,014 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-04-05 05:06:49,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-04-05 05:06:49,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-04-05 05:06:49,015 INFO L138 SettingsManager]: * Use SBE=true [2022-04-05 05:06:49,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 05:06:49,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 05:06:49,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 05:06:49,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 05:06:49,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 05:06:49,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 05:06:49,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 05:06:49,017 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 05:06:49,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 05:06:49,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 05:06:49,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 05:06:49,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 05:06:49,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:06:49,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 05:06:49,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-04-05 05:06:49,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-04-05 05:06:49,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 05:06:49,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-04-05 05:06:49,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-05 05:06:49,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-04-05 05:06:49,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-04-05 05:06:49,019 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 05:06:49,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 05:06:49,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 05:06:49,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 05:06:49,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 05:06:49,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 05:06:49,221 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 05:06:49,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2022-04-05 05:06:49,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/864af71f9/1571627108524ad7bb3fb0a92ccb5678/FLAGfdd2e102d [2022-04-05 05:06:49,633 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 05:06:49,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-1.c [2022-04-05 05:06:49,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/864af71f9/1571627108524ad7bb3fb0a92ccb5678/FLAGfdd2e102d [2022-04-05 05:06:50,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/864af71f9/1571627108524ad7bb3fb0a92ccb5678 [2022-04-05 05:06:50,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 05:06:50,095 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 05:06:50,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 05:06:50,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 05:06:50,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 05:06:50,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bee0ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50, skipping insertion in model container [2022-04-05 05:06:50,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 05:06:50,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 05:06:50,362 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-1.c[322,335] [2022-04-05 05:06:50,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:06:50,389 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 05:06:50,397 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-1.c[322,335] [2022-04-05 05:06:50,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 05:06:50,407 INFO L208 MainTranslator]: Completed translation [2022-04-05 05:06:50,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50 WrapperNode [2022-04-05 05:06:50,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 05:06:50,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 05:06:50,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 05:06:50,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 05:06:50,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 05:06:50,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 05:06:50,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 05:06:50,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 05:06:50,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 05:06:50,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:06:50,501 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) [2022-04-05 05:06:50,555 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 [2022-04-05 05:06:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 05:06:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 05:06:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 05:06:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 05:06:50,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 05:06:50,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 05:06:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 05:06:50,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 05:06:50,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 05:06:50,627 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 05:06:50,628 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 05:06:50,721 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 05:06:50,725 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 05:06:50,725 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 05:06:50,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:06:50 BoogieIcfgContainer [2022-04-05 05:06:50,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 05:06:50,727 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 05:06:50,727 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 05:06:50,728 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 05:06:50,730 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:06:50" (1/1) ... [2022-04-05 05:06:50,732 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-04-05 05:06:50,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:06:50 BasicIcfg [2022-04-05 05:06:50,746 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 05:06:50,747 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 05:06:50,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 05:06:50,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 05:06:50,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 05:06:50" (1/4) ... [2022-04-05 05:06:50,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1018480c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:06:50, skipping insertion in model container [2022-04-05 05:06:50,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 05:06:50" (2/4) ... [2022-04-05 05:06:50,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1018480c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 05:06:50, skipping insertion in model container [2022-04-05 05:06:50,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 05:06:50" (3/4) ... [2022-04-05 05:06:50,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1018480c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:06:50, skipping insertion in model container [2022-04-05 05:06:50,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 05:06:50" (4/4) ... [2022-04-05 05:06:50,752 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-1.cqvasr [2022-04-05 05:06:50,755 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-04-05 05:06:50,755 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 05:06:50,798 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 05:06:50,803 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 [2022-04-05 05:06:50,803 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 05:06:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-04-05 05:06:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 05:06:50,824 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:06:50,825 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:06:50,826 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:06:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:06:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash -756157467, now seen corresponding path program 1 times [2022-04-05 05:06:50,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:06:50,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418469367] [2022-04-05 05:06:50,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:50,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:06:50,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:50,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:06:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:50,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:06:50,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418469367] [2022-04-05 05:06:50,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418469367] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:06:50,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:06:50,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 05:06:50,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333428211] [2022-04-05 05:06:50,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:06:50,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 05:06:50,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:06:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 05:06:51,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 05:06:51,029 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2022-04-05 05:06:51,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:06:51,069 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-04-05 05:06:51,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 05:06:51,071 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 [2022-04-05 05:06:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:06:51,079 INFO L225 Difference]: With dead ends: 30 [2022-04-05 05:06:51,079 INFO L226 Difference]: Without dead ends: 13 [2022-04-05 05:06:51,081 INFO L912 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 [2022-04-05 05:06:51,083 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 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 [2022-04-05 05:06:51,084 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 05:06:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-05 05:06:51,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-05 05:06:51,108 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) [2022-04-05 05:06:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-04-05 05:06:51,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-04-05 05:06:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:06:51,110 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-04-05 05:06:51,111 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) [2022-04-05 05:06:51,111 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-04-05 05:06:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-05 05:06:51,111 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:06:51,111 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:06:51,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 05:06:51,112 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:06:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:06:51,115 INFO L85 PathProgramCache]: Analyzing trace with hash -755233946, now seen corresponding path program 1 times [2022-04-05 05:06:51,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:06:51,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149912420] [2022-04-05 05:06:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:51,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:06:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:51,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:06:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:51,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:06:51,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149912420] [2022-04-05 05:06:51,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149912420] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 05:06:51,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 05:06:51,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-05 05:06:51,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318555507] [2022-04-05 05:06:51,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 05:06:51,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-05 05:06:51,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:06:51,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-05 05:06:51,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-05 05:06:51,236 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) [2022-04-05 05:06:51,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:06:51,271 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-04-05 05:06:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-05 05:06:51,272 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 [2022-04-05 05:06:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:06:51,273 INFO L225 Difference]: With dead ends: 22 [2022-04-05 05:06:51,273 INFO L226 Difference]: Without dead ends: 15 [2022-04-05 05:06:51,276 INFO L912 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 [2022-04-05 05:06:51,277 INFO L913 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 [2022-04-05 05:06:51,278 INFO L914 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] [2022-04-05 05:06:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-05 05:06:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-05 05:06:51,284 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) [2022-04-05 05:06:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-05 05:06:51,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-04-05 05:06:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:06:51,287 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-05 05:06:51,287 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) [2022-04-05 05:06:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-05 05:06:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-05 05:06:51,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:06:51,287 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:06:51,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-05 05:06:51,287 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:06:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:06:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash 980092676, now seen corresponding path program 1 times [2022-04-05 05:06:51,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:06:51,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336457868] [2022-04-05 05:06:51,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:51,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:06:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:51,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:06:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:51,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:06:51,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336457868] [2022-04-05 05:06:51,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336457868] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:06:51,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320864258] [2022-04-05 05:06:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:51,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:06:51,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:06:51,420 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) [2022-04-05 05:06:51,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 05:06:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-05 05:06:51,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:06:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:51,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:06:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:51,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320864258] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:06:51,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:06:51,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-05 05:06:51,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120073646] [2022-04-05 05:06:51,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:06:51,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 05:06:51,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:06:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 05:06:51,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-05 05:06:51,559 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-04-05 05:06:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:06:51,650 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-04-05 05:06:51,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 05:06:51,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 [2022-04-05 05:06:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:06:51,651 INFO L225 Difference]: With dead ends: 26 [2022-04-05 05:06:51,651 INFO L226 Difference]: Without dead ends: 19 [2022-04-05 05:06:51,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:06:51,652 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:06:51,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 33 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:06:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-05 05:06:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-04-05 05:06:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2022-04-05 05:06:51,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-05 05:06:51,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-04-05 05:06:51,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:06:51,656 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-05 05:06:51,657 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-04-05 05:06:51,657 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-05 05:06:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 05:06:51,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:06:51,657 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:06:51,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 05:06:51,873 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 [2022-04-05 05:06:51,874 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:06:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:06:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1575643231, now seen corresponding path program 1 times [2022-04-05 05:06:51,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:06:51,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483763787] [2022-04-05 05:06:51,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:51,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:06:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:51,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:06:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:06:51,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483763787] [2022-04-05 05:06:51,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483763787] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:06:51,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158395816] [2022-04-05 05:06:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:51,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:06:51,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:06:51,978 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) [2022-04-05 05:06:51,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 05:06:52,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:52,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 05:06:52,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:06:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:52,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:06:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 05:06:52,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158395816] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:06:52,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:06:52,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 12 [2022-04-05 05:06:52,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555793467] [2022-04-05 05:06:52,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:06:52,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 05:06:52,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:06:52,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 05:06:52,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-05 05:06:52,208 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-04-05 05:06:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:06:52,342 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-04-05 05:06:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 05:06:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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 17 [2022-04-05 05:06:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:06:52,343 INFO L225 Difference]: With dead ends: 34 [2022-04-05 05:06:52,343 INFO L226 Difference]: Without dead ends: 23 [2022-04-05 05:06:52,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-04-05 05:06:52,344 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:06:52,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:06:52,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-05 05:06:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-05 05:06:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-04-05 05:06:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-04-05 05:06:52,348 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-04-05 05:06:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:06:52,348 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-04-05 05:06:52,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 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) [2022-04-05 05:06:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-04-05 05:06:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-05 05:06:52,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:06:52,349 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:06:52,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 05:06:52,568 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 [2022-04-05 05:06:52,568 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:06:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:06:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1560917373, now seen corresponding path program 2 times [2022-04-05 05:06:52,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:06:52,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797284285] [2022-04-05 05:06:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:52,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:06:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:52,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:06:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:52,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:06:52,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797284285] [2022-04-05 05:06:52,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797284285] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:06:52,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740428014] [2022-04-05 05:06:52,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 05:06:52,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:06:52,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:06:52,664 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) [2022-04-05 05:06:52,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 05:06:52,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 05:06:52,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:06:52,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-05 05:06:52,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:06:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:52,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:06:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:52,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740428014] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:06:52,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:06:52,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-04-05 05:06:52,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905280688] [2022-04-05 05:06:52,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:06:52,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 05:06:52,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:06:52,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 05:06:52,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-05 05:06:52,876 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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) [2022-04-05 05:06:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:06:53,147 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2022-04-05 05:06:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 05:06:53,147 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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 [2022-04-05 05:06:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:06:53,148 INFO L225 Difference]: With dead ends: 42 [2022-04-05 05:06:53,148 INFO L226 Difference]: Without dead ends: 32 [2022-04-05 05:06:53,148 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2022-04-05 05:06:53,149 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 05:06:53,149 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 44 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 05:06:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-05 05:06:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-05 05:06:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 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) [2022-04-05 05:06:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-04-05 05:06:53,153 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2022-04-05 05:06:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:06:53,153 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-04-05 05:06:53,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 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) [2022-04-05 05:06:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-04-05 05:06:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-05 05:06:53,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:06:53,154 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:06:53,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 05:06:53,367 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 [2022-04-05 05:06:53,367 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:06:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:06:53,368 INFO L85 PathProgramCache]: Analyzing trace with hash 838082225, now seen corresponding path program 3 times [2022-04-05 05:06:53,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:06:53,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503379900] [2022-04-05 05:06:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:53,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:06:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:53,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:06:53,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:53,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:06:53,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503379900] [2022-04-05 05:06:53,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503379900] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:06:53,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297406175] [2022-04-05 05:06:53,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 05:06:53,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:06:53,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:06:53,511 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) [2022-04-05 05:06:53,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 05:06:53,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 05:06:53,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:06:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-05 05:06:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:06:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 05:06:53,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:06:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-05 05:06:53,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297406175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:06:53,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:06:53,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 17 [2022-04-05 05:06:53,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132675671] [2022-04-05 05:06:53,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:06:53,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-05 05:06:53,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:06:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-05 05:06:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2022-04-05 05:06:53,689 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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) [2022-04-05 05:06:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:06:54,077 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2022-04-05 05:06:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-05 05:06:54,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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 31 [2022-04-05 05:06:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:06:54,078 INFO L225 Difference]: With dead ends: 63 [2022-04-05 05:06:54,078 INFO L226 Difference]: Without dead ends: 53 [2022-04-05 05:06:54,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2022-04-05 05:06:54,079 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 05:06:54,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 23 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 05:06:54,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-05 05:06:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2022-04-05 05:06:54,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 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) [2022-04-05 05:06:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-04-05 05:06:54,086 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 31 [2022-04-05 05:06:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:06:54,086 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-04-05 05:06:54,086 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 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) [2022-04-05 05:06:54,086 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-04-05 05:06:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-05 05:06:54,087 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:06:54,087 INFO L499 BasicCegarLoop]: trace histogram [15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:06:54,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 05:06:54,305 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 [2022-04-05 05:06:54,305 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:06:54,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:06:54,305 INFO L85 PathProgramCache]: Analyzing trace with hash 890325540, now seen corresponding path program 4 times [2022-04-05 05:06:54,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:06:54,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011762903] [2022-04-05 05:06:54,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:06:54,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:06:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:54,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:06:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:06:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 132 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 05:06:54,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:06:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011762903] [2022-04-05 05:06:54,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011762903] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:06:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997244335] [2022-04-05 05:06:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 05:06:54,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:06:54,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:06:54,488 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) [2022-04-05 05:06:54,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 05:06:54,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 05:06:54,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:06:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 33 conjunts are in the unsatisfiable core [2022-04-05 05:06:54,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:06:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:54,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:06:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 05:06:55,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997244335] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:06:55,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:06:55,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 36 [2022-04-05 05:06:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848861910] [2022-04-05 05:06:55,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:06:55,184 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-05 05:06:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:06:55,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-05 05:06:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2022-04-05 05:06:55,185 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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) [2022-04-05 05:07:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:07:05,066 INFO L93 Difference]: Finished difference Result 93 states and 126 transitions. [2022-04-05 05:07:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-05 05:07:05,067 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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 41 [2022-04-05 05:07:05,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:07:05,068 INFO L225 Difference]: With dead ends: 93 [2022-04-05 05:07:05,068 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 05:07:05,070 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=876, Invalid=2430, Unknown=0, NotChecked=0, Total=3306 [2022-04-05 05:07:05,070 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-05 05:07:05,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 98 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-05 05:07:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 05:07:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2022-04-05 05:07:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 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) [2022-04-05 05:07:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-04-05 05:07:05,077 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 41 [2022-04-05 05:07:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:07:05,077 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-04-05 05:07:05,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 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) [2022-04-05 05:07:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-04-05 05:07:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-05 05:07:05,078 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:07:05,078 INFO L499 BasicCegarLoop]: trace histogram [23, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:07:05,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 05:07:05,291 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 [2022-04-05 05:07:05,293 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:07:05,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:07:05,294 INFO L85 PathProgramCache]: Analyzing trace with hash -422126962, now seen corresponding path program 5 times [2022-04-05 05:07:05,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:07:05,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757301356] [2022-04-05 05:07:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:07:05,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:07:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:07:05,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:07:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:07:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 266 proven. 182 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-05 05:07:05,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:07:05,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757301356] [2022-04-05 05:07:05,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757301356] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:07:05,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127000640] [2022-04-05 05:07:05,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 05:07:05,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:07:05,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:07:05,532 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) [2022-04-05 05:07:05,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 05:07:06,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-04-05 05:07:06,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:07:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-05 05:07:06,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:07:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 140 proven. 380 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 05:07:07,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:07:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 140 proven. 380 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-05 05:07:07,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127000640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:07:07,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:07:07,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 23] total 45 [2022-04-05 05:07:07,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389570113] [2022-04-05 05:07:07,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:07:07,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-05 05:07:07,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:07:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-05 05:07:07,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2022-04-05 05:07:07,982 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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) [2022-04-05 05:08:14,330 WARN L232 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 149 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-05 05:08:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:08:14,408 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2022-04-05 05:08:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-05 05:08:14,408 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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 57 [2022-04-05 05:08:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:08:14,409 INFO L225 Difference]: With dead ends: 130 [2022-04-05 05:08:14,409 INFO L226 Difference]: Without dead ends: 102 [2022-04-05 05:08:14,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 66.7s TimeCoverageRelationStatistics Valid=1704, Invalid=4615, Unknown=1, NotChecked=0, Total=6320 [2022-04-05 05:08:14,411 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-05 05:08:14,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 124 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-05 05:08:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-05 05:08:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-05 05:08:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.1237113402061856) internal successors, (109), 97 states have internal predecessors, (109), 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) [2022-04-05 05:08:14,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2022-04-05 05:08:14,445 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 57 [2022-04-05 05:08:14,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:08:14,446 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2022-04-05 05:08:14,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 44 states have internal predecessors, (94), 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) [2022-04-05 05:08:14,446 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2022-04-05 05:08:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-05 05:08:14,453 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 05:08:14,458 INFO L499 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 05:08:14,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-05 05:08:14,662 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 [2022-04-05 05:08:14,664 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 05:08:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 05:08:14,665 INFO L85 PathProgramCache]: Analyzing trace with hash -759620958, now seen corresponding path program 6 times [2022-04-05 05:08:14,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 05:08:14,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847959396] [2022-04-05 05:08:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 05:08:14,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 05:08:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:08:15,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 05:08:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 05:08:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-04-05 05:08:15,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 05:08:15,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847959396] [2022-04-05 05:08:15,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847959396] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 05:08:15,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686563284] [2022-04-05 05:08:15,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 05:08:15,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 05:08:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 05:08:15,544 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) [2022-04-05 05:08:15,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 05:08:28,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-04-05 05:08:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 05:08:28,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-05 05:08:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 05:08:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 953 proven. 470 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2022-04-05 05:08:30,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 05:08:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 735 proven. 100 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-05 05:08:32,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686563284] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 05:08:32,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-05 05:08:32,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22, 17] total 74 [2022-04-05 05:08:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977171678] [2022-04-05 05:08:32,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-04-05 05:08:32,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-05 05:08:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 05:08:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-05 05:08:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1358, Invalid=4044, Unknown=0, NotChecked=0, Total=5402 [2022-04-05 05:08:32,870 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:08:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 05:08:45,574 INFO L93 Difference]: Finished difference Result 193 states and 250 transitions. [2022-04-05 05:08:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-05 05:08:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-05 05:08:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 05:08:45,575 INFO L225 Difference]: With dead ends: 193 [2022-04-05 05:08:45,575 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 05:08:45,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=3276, Invalid=14280, Unknown=0, NotChecked=0, Total=17556 [2022-04-05 05:08:45,579 INFO L913 BasicCegarLoop]: 7 mSDtfsCounter, 168 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-05 05:08:45,579 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 84 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-05 05:08:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 05:08:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 05:08:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 05:08:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 05:08:45,580 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2022-04-05 05:08:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 05:08:45,580 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 05:08:45,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 72 states have internal predecessors, (150), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-05 05:08:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 05:08:45,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 05:08:45,582 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 05:08:45,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 05:08:45,789 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 [2022-04-05 05:08:45,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-05 05:09:01,337 WARN L232 SmtUtils]: Spent 13.70s on a formula simplification. DAG size of input: 369 DAG size of output: 12 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-05 05:09:01,342 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-05 05:09:01,342 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-04-05 05:09:01,343 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-04-05 05:09:01,343 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-05 05:09:01,343 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-05 05:09:01,343 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-04-05 05:09:01,343 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-04-05 05:09:01,344 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 12 24) the Hoare annotation is: true [2022-04-05 05:09:01,345 INFO L878 garLoopResultBuilder]: At program point L16-2(lines 15 21) the Hoare annotation is: (or (< (mod (+ main_~x~0 4294967295) 4294967296) 65520) (= (mod main_~x~0 2) 0)) [2022-04-05 05:09:01,345 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 15 21) the Hoare annotation is: (= (mod main_~x~0 2) 0) [2022-04-05 05:09:01,345 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 20) no Hoare annotation was computed. [2022-04-05 05:09:01,345 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 12 24) no Hoare annotation was computed. [2022-04-05 05:09:01,345 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 12 24) no Hoare annotation was computed. [2022-04-05 05:09:01,345 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-04-05 05:09:01,345 INFO L882 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2022-04-05 05:09:01,345 INFO L882 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2022-04-05 05:09:01,345 INFO L882 garLoopResultBuilder]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2022-04-05 05:09:01,345 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2022-04-05 05:09:01,345 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2022-04-05 05:09:01,354 INFO L719 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1] [2022-04-05 05:09:01,356 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 05:09:01,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 05:09:01 BasicIcfg [2022-04-05 05:09:01,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 05:09:01,370 INFO L158 Benchmark]: Toolchain (without parser) took 131275.25ms. Allocated memory was 173.0MB in the beginning and 352.3MB in the end (delta: 179.3MB). Free memory was 121.9MB in the beginning and 308.0MB in the end (delta: -186.1MB). Peak memory consumption was 174.5MB. Max. memory is 8.0GB. [2022-04-05 05:09:01,371 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 138.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 05:09:01,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 315.67ms. Allocated memory is still 173.0MB. Free memory was 121.6MB in the beginning and 150.8MB in the end (delta: -29.2MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2022-04-05 05:09:01,371 INFO L158 Benchmark]: Boogie Preprocessor took 23.81ms. Allocated memory is still 173.0MB. Free memory was 150.8MB in the beginning and 149.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 05:09:01,371 INFO L158 Benchmark]: RCFGBuilder took 277.78ms. Allocated memory is still 173.0MB. Free memory was 149.3MB in the beginning and 139.5MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-05 05:09:01,372 INFO L158 Benchmark]: IcfgTransformer took 18.83ms. Allocated memory is still 173.0MB. Free memory was 139.5MB in the beginning and 138.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 05:09:01,373 INFO L158 Benchmark]: TraceAbstraction took 130622.79ms. Allocated memory was 173.0MB in the beginning and 352.3MB in the end (delta: 179.3MB). Free memory was 137.8MB in the beginning and 308.0MB in the end (delta: -170.2MB). Peak memory consumption was 190.9MB. Max. memory is 8.0GB. [2022-04-05 05:09:01,375 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 138.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 315.67ms. Allocated memory is still 173.0MB. Free memory was 121.6MB in the beginning and 150.8MB in the end (delta: -29.2MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.81ms. Allocated memory is still 173.0MB. Free memory was 150.8MB in the beginning and 149.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 277.78ms. Allocated memory is still 173.0MB. Free memory was 149.3MB in the beginning and 139.5MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 18.83ms. Allocated memory is still 173.0MB. Free memory was 139.5MB in the beginning and 138.4MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 130622.79ms. Allocated memory was 173.0MB in the beginning and 352.3MB in the end (delta: 179.3MB). Free memory was 137.8MB in the beginning and 308.0MB in the end (delta: -170.2MB). Peak memory consumption was 190.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 130.6s, OverallIterations: 9, TraceHistogramMax: 45, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 90.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 408 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 407 mSDsluCounter, 495 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 389 mSDsCounter, 901 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4078 IncrementalHoareTripleChecker+Invalid, 4979 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 901 mSolverCounterUnsat, 106 mSDtfsCounter, 4078 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 843 GetRequests, 485 SyntacticMatches, 12 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3624 ImplicationChecksByTransitivity, 92.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=8, InterpolantAutomatonStates: 179, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 32 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 97 NumberOfFragments, 29 HoareAnnotationTreeSize, 17 FomulaSimplifications, 66 FormulaSimplificationTreeSizeReduction, 1.8s HoareSimplificationTime, 7 FomulaSimplificationsInter, 77883 FormulaSimplificationTreeSizeReductionInter, 13.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 14.5s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 580 NumberOfCodeBlocks, 560 NumberOfCodeBlocksAsserted, 86 NumberOfCheckSat, 836 ConstructedInterpolants, 0 QuantifiedInterpolants, 4190 SizeOfPredicates, 6 NumberOfNonLiveVariables, 721 ConjunctsInSsa, 172 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 5210/8715 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: (x + 4294967295) % 4294967296 < 65520 || x % 2 == 0 RESULT: Ultimate proved your program to be correct! [2022-04-05 05:09:01,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...