/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 21:37:23,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 21:37:23,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 21:37:23,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 21:37:23,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 21:37:23,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 21:37:23,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 21:37:23,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 21:37:23,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 21:37:23,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 21:37:23,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 21:37:23,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 21:37:23,043 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 21:37:23,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 21:37:23,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 21:37:23,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 21:37:23,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 21:37:23,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 21:37:23,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 21:37:23,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 21:37:23,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 21:37:23,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 21:37:23,070 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 21:37:23,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 21:37:23,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 21:37:23,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 21:37:23,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 21:37:23,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 21:37:23,071 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 21:37:23,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 21:37:23,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 21:37:23,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 21:37:23,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 21:37:23,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 21:37:23,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 21:37:23,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 21:37:23,072 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 21:37:23,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 21:37:23,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 21:37:23,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 21:37:23,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 21:37:23,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:37:23,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 21:37:23,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 21:37:23,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 21:37:23,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 21:37:23,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 21:37:23,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 21:37:23,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 21:37:23,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 21:37:23,075 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 21:37:23,075 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 21:37:23,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 21:37:23,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 21:37:23,268 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 21:37:23,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 21:37:23,270 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 21:37:23,271 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2022-03-18 21:37:23,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e0a3dbf/ad3a420562564be39ff17cb4869e9a2d/FLAG7bb4cd70e [2022-03-18 21:37:23,724 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 21:37:23,724 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2022-03-18 21:37:23,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e0a3dbf/ad3a420562564be39ff17cb4869e9a2d/FLAG7bb4cd70e [2022-03-18 21:37:23,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29e0a3dbf/ad3a420562564be39ff17cb4869e9a2d [2022-03-18 21:37:23,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 21:37:23,745 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 21:37:23,749 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 21:37:23,749 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 21:37:23,751 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 21:37:23,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:23,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9176ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23, skipping insertion in model container [2022-03-18 21:37:23,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:23,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 21:37:23,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 21:37:23,905 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c[600,613] [2022-03-18 21:37:23,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:37:23,937 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 21:37:23,948 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c[600,613] [2022-03-18 21:37:23,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:37:23,978 INFO L208 MainTranslator]: Completed translation [2022-03-18 21:37:23,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23 WrapperNode [2022-03-18 21:37:23,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 21:37:23,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 21:37:23,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 21:37:23,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 21:37:23,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:23,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:23,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:23,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:24,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:24,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:24,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:24,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 21:37:24,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 21:37:24,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 21:37:24,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 21:37:24,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (1/1) ... [2022-03-18 21:37:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:37:24,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:24,036 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 21:37:24,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 21:37:24,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 21:37:24,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 21:37:24,067 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 21:37:24,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 21:37:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 21:37:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 21:37:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 21:37:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 21:37:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 21:37:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 21:37:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 21:37:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 21:37:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 21:37:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-18 21:37:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 21:37:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 21:37:24,114 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 21:37:24,115 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 21:37:24,205 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 21:37:24,209 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 21:37:24,210 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 21:37:24,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:37:24 BoogieIcfgContainer [2022-03-18 21:37:24,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 21:37:24,212 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 21:37:24,212 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 21:37:24,220 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 21:37:24,222 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:37:24" (1/1) ... [2022-03-18 21:37:24,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:37:24 BasicIcfg [2022-03-18 21:37:24,235 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 21:37:24,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 21:37:24,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 21:37:24,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 21:37:24,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 09:37:23" (1/4) ... [2022-03-18 21:37:24,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3b211a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:37:24, skipping insertion in model container [2022-03-18 21:37:24,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:23" (2/4) ... [2022-03-18 21:37:24,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3b211a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:37:24, skipping insertion in model container [2022-03-18 21:37:24,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:37:24" (3/4) ... [2022-03-18 21:37:24,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b3b211a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:37:24, skipping insertion in model container [2022-03-18 21:37:24,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:37:24" (4/4) ... [2022-03-18 21:37:24,240 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.cqvasr [2022-03-18 21:37:24,244 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 21:37:24,244 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 21:37:24,291 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 21:37:24,295 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 21:37:24,295 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 21:37:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 21:37:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-18 21:37:24,323 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:24,324 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:24,324 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:24,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1140822413, now seen corresponding path program 1 times [2022-03-18 21:37:24,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:24,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692204023] [2022-03-18 21:37:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:24,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:24,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:37:24,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:24,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692204023] [2022-03-18 21:37:24,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692204023] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:37:24,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:37:24,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:37:24,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219702385] [2022-03-18 21:37:24,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:37:24,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:37:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:24,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:37:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:37:24,578 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:24,670 INFO L93 Difference]: Finished difference Result 52 states and 81 transitions. [2022-03-18 21:37:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 21:37:24,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-18 21:37:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:24,677 INFO L225 Difference]: With dead ends: 52 [2022-03-18 21:37:24,677 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 21:37:24,702 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:37:24,724 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:24,725 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 25 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:37:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 21:37:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2022-03-18 21:37:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-18 21:37:24,748 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-03-18 21:37:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:24,748 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-18 21:37:24,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,748 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-18 21:37:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 21:37:24,749 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:24,749 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:24,749 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 21:37:24,749 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:24,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:24,750 INFO L85 PathProgramCache]: Analyzing trace with hash 195845143, now seen corresponding path program 1 times [2022-03-18 21:37:24,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:24,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454906506] [2022-03-18 21:37:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:24,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:24,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:37:24,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:24,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454906506] [2022-03-18 21:37:24,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454906506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:37:24,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:37:24,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:37:24,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892350686] [2022-03-18 21:37:24,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:37:24,794 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:37:24,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:37:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:37:24,795 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:24,834 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-18 21:37:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 21:37:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 21:37:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:24,835 INFO L225 Difference]: With dead ends: 40 [2022-03-18 21:37:24,835 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 21:37:24,836 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:37:24,836 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:24,837 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:37:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 21:37:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2022-03-18 21:37:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 21:37:24,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-03-18 21:37:24,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:24,840 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 21:37:24,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 21:37:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 21:37:24,841 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:24,841 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:24,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 21:37:24,841 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1483649217, now seen corresponding path program 1 times [2022-03-18 21:37:24,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:24,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97502063] [2022-03-18 21:37:24,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:24,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:24,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:37:24,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:24,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97502063] [2022-03-18 21:37:24,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97502063] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:37:24,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:37:24,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:37:24,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480369452] [2022-03-18 21:37:24,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:37:24,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:37:24,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:24,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:37:24,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:37:24,884 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:24,959 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-03-18 21:37:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 21:37:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 21:37:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:24,960 INFO L225 Difference]: With dead ends: 31 [2022-03-18 21:37:24,960 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 21:37:24,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:37:24,964 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:24,965 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:37:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 21:37:24,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-03-18 21:37:24,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-18 21:37:24,974 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-03-18 21:37:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:24,974 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-18 21:37:24,974 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-18 21:37:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 21:37:24,976 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:24,976 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:24,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 21:37:24,977 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:24,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1830037535, now seen corresponding path program 1 times [2022-03-18 21:37:24,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:24,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280122455] [2022-03-18 21:37:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:24,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:25,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:37:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:25,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280122455] [2022-03-18 21:37:25,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280122455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:25,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346595123] [2022-03-18 21:37:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:25,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:25,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:25,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:37:25,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 21:37:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 21:37:25,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:37:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 21:37:25,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:37:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 21:37:25,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346595123] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:37:25,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:37:25,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-18 21:37:25,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451595499] [2022-03-18 21:37:25,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:37:25,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 21:37:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 21:37:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 21:37:25,347 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:25,520 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-03-18 21:37:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 21:37:25,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 2 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 17 [2022-03-18 21:37:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:25,521 INFO L225 Difference]: With dead ends: 66 [2022-03-18 21:37:25,521 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 21:37:25,522 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-03-18 21:37:25,522 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:25,522 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 52 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:37:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 21:37:25,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-03-18 21:37:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-03-18 21:37:25,529 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 17 [2022-03-18 21:37:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:25,529 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-03-18 21:37:25,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-03-18 21:37:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-18 21:37:25,530 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:25,530 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:25,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 21:37:25,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:25,748 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:25,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1722712909, now seen corresponding path program 2 times [2022-03-18 21:37:25,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:25,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504507144] [2022-03-18 21:37:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:25,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:25,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 21:37:25,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:25,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504507144] [2022-03-18 21:37:25,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504507144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:25,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243078481] [2022-03-18 21:37:25,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 21:37:25,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:25,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:25,896 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:37:25,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 21:37:25,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 21:37:25,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:37:25,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 21:37:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:37:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 50 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-03-18 21:37:26,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:37:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 87 proven. 22 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-03-18 21:37:26,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243078481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:37:26,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:37:26,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 16 [2022-03-18 21:37:26,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286650827] [2022-03-18 21:37:26,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:37:26,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 21:37:26,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:26,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 21:37:26,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-18 21:37:26,251 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:26,740 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2022-03-18 21:37:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 21:37:26,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 1 states have call successors, (3), 2 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 49 [2022-03-18 21:37:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:26,742 INFO L225 Difference]: With dead ends: 190 [2022-03-18 21:37:26,742 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 21:37:26,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2022-03-18 21:37:26,743 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:26,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 112 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 21:37:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 21:37:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 116. [2022-03-18 21:37:26,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 112 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 137 transitions. [2022-03-18 21:37:26,785 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 137 transitions. Word has length 49 [2022-03-18 21:37:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:26,785 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 137 transitions. [2022-03-18 21:37:26,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 137 transitions. [2022-03-18 21:37:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 21:37:26,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:26,788 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:26,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 21:37:27,001 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:27,002 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:27,003 INFO L85 PathProgramCache]: Analyzing trace with hash -770988551, now seen corresponding path program 3 times [2022-03-18 21:37:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525723250] [2022-03-18 21:37:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:27,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:27,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 188 proven. 36 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-18 21:37:27,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525723250] [2022-03-18 21:37:27,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525723250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170335503] [2022-03-18 21:37:27,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 21:37:27,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:27,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:27,153 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:37:27,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 21:37:27,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-18 21:37:27,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:37:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 21:37:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:37:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 109 proven. 128 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-18 21:37:27,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:37:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 134 proven. 9 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-03-18 21:37:27,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170335503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:37:27,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:37:27,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 14 [2022-03-18 21:37:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361571229] [2022-03-18 21:37:27,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:37:27,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 21:37:27,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 21:37:27,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-03-18 21:37:27,550 INFO L87 Difference]: Start difference. First operand 116 states and 137 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:27,858 INFO L93 Difference]: Finished difference Result 231 states and 286 transitions. [2022-03-18 21:37:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 21:37:27,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (3), 2 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 69 [2022-03-18 21:37:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:27,862 INFO L225 Difference]: With dead ends: 231 [2022-03-18 21:37:27,863 INFO L226 Difference]: Without dead ends: 123 [2022-03-18 21:37:27,864 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2022-03-18 21:37:27,866 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:27,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 76 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:37:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-18 21:37:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-03-18 21:37:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.076271186440678) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2022-03-18 21:37:27,885 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 69 [2022-03-18 21:37:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:27,885 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2022-03-18 21:37:27,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2022-03-18 21:37:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 21:37:27,886 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:27,886 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:27,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 21:37:28,094 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:28,095 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1779206789, now seen corresponding path program 4 times [2022-03-18 21:37:28,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:28,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632451827] [2022-03-18 21:37:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:28,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:28,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:28,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 806 proven. 121 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2022-03-18 21:37:28,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:28,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632451827] [2022-03-18 21:37:28,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632451827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:28,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873260984] [2022-03-18 21:37:28,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 21:37:28,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:28,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:28,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:37:28,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 21:37:28,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 21:37:28,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:37:28,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 21:37:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:37:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 0 proven. 1715 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-03-18 21:37:28,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:37:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2124 backedges. 63 proven. 1652 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2022-03-18 21:37:29,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873260984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:37:29,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:37:29,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 35 [2022-03-18 21:37:29,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981415000] [2022-03-18 21:37:29,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:37:29,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 21:37:29,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:29,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 21:37:29,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 21:37:29,250 INFO L87 Difference]: Start difference. First operand 122 states and 130 transitions. Second operand has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:36,353 INFO L93 Difference]: Finished difference Result 435 states and 479 transitions. [2022-03-18 21:37:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-18 21:37:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 1 states have call successors, (3), 2 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 121 [2022-03-18 21:37:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:36,354 INFO L225 Difference]: With dead ends: 435 [2022-03-18 21:37:36,355 INFO L226 Difference]: Without dead ends: 321 [2022-03-18 21:37:36,361 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9108 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3226, Invalid=22214, Unknown=0, NotChecked=0, Total=25440 [2022-03-18 21:37:36,362 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 503 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 2684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:36,362 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 273 Invalid, 2684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 21:37:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-18 21:37:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 310. [2022-03-18 21:37:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.0686274509803921) internal successors, (327), 306 states have internal predecessors, (327), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 330 transitions. [2022-03-18 21:37:36,381 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 330 transitions. Word has length 121 [2022-03-18 21:37:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:36,381 INFO L478 AbstractCegarLoop]: Abstraction has 310 states and 330 transitions. [2022-03-18 21:37:36,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6) internal successors, (126), 34 states have internal predecessors, (126), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 330 transitions. [2022-03-18 21:37:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-03-18 21:37:36,383 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:36,384 INFO L500 BasicCegarLoop]: trace histogram [120, 120, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:36,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 21:37:36,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:36,601 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:36,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1817132379, now seen corresponding path program 5 times [2022-03-18 21:37:36,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:36,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126846190] [2022-03-18 21:37:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:36,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:37,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 15860 backedges. 2846 proven. 144 refuted. 0 times theorem prover too weak. 12870 trivial. 0 not checked. [2022-03-18 21:37:37,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:37,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126846190] [2022-03-18 21:37:37,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126846190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:37,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668426344] [2022-03-18 21:37:37,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 21:37:37,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:37,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:37,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:37:37,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process