/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:04:58,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:04:58,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:04:58,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-14 22:04:58,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-14 22:04:58,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-14 22:04:58,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-14 22:04:58,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-14 22:04:58,659 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-14 22:04:58,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-14 22:04:58,660 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-14 22:04:58,661 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-14 22:04:58,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:04:58,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:04:58,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:04:58,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:04:58,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:04:58,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:04:58,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:04:58,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:04:58,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:04:58,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:04:58,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:04:58,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:04:58,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 22:04:58,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:04:58,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:04:58,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:04:58,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:04:58,698 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:04:58,698 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:04:58,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:04:58,699 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:04:58,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:04:58,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:04:58,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:04:58,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:04:58,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:04:58,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:04:58,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:04:58,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:04:58,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:04:58,701 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:04:58,701 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:04:58,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:04:58,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:04:58,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:04:58,936 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:04:58,936 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:04:58,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2022-02-14 22:04:59,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f942bc7/370d42ea6a364c4aa4f558bead0ae66e/FLAG8a8d90880 [2022-02-14 22:04:59,313 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:04:59,313 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c [2022-02-14 22:04:59,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f942bc7/370d42ea6a364c4aa4f558bead0ae66e/FLAG8a8d90880 [2022-02-14 22:04:59,764 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f942bc7/370d42ea6a364c4aa4f558bead0ae66e [2022-02-14 22:04:59,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:04:59,766 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:04:59,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:04:59,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:04:59,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:04:59,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:04:59,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a35648f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59, skipping insertion in model container [2022-02-14 22:04:59,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:04:59,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:04:59,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:04:59,901 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601] [2022-02-14 22:04:59,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:04:59,938 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:04:59,950 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound5.c[588,601] [2022-02-14 22:04:59,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:04:59,982 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:04:59,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59 WrapperNode [2022-02-14 22:04:59,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:04:59,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:04:59,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:04:59,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:04:59,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:04:59,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:04:59,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:04:59,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:05:00,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:05:00,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:05:00,004 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:05:00,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:05:00,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:05:00,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:05:00,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:05:00,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (1/1) ... [2022-02-14 22:05:00,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:05:00,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:00,093 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) [2022-02-14 22:05:00,131 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 [2022-02-14 22:05:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:05:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:05:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:05:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:05:00,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:05:00,166 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:05:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:05:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:05:00,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:05:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:05:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-02-14 22:05:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:05:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:05:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:05:00,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:05:00,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:05:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:05:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:05:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:05:00,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:05:00,210 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:05:00,212 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:05:00,304 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:05:00,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:05:00,308 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 22:05:00,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:05:00 BoogieIcfgContainer [2022-02-14 22:05:00,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:05:00,310 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:05:00,310 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:05:00,311 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:05:00,313 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:05:00" (1/1) ... [2022-02-14 22:05:00,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:05:00 BasicIcfg [2022-02-14 22:05:00,324 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:05:00,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:05:00,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:05:00,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:05:00,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:04:59" (1/4) ... [2022-02-14 22:05:00,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b340ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:05:00, skipping insertion in model container [2022-02-14 22:05:00,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:04:59" (2/4) ... [2022-02-14 22:05:00,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b340ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:05:00, skipping insertion in model container [2022-02-14 22:05:00,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:05:00" (3/4) ... [2022-02-14 22:05:00,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b340ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:05:00, skipping insertion in model container [2022-02-14 22:05:00,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:05:00" (4/4) ... [2022-02-14 22:05:00,329 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound5.cJordan [2022-02-14 22:05:00,332 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:05:00,332 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:05:00,363 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:05:00,367 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 22:05:00,367 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:05:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 22:05:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 22:05:00,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:00,379 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:00,379 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:00,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2022-02-14 22:05:00,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:00,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762307146] [2022-02-14 22:05:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:00,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:00,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:05:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:05:00,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:00,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762307146] [2022-02-14 22:05:00,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762307146] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:05:00,489 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:05:00,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:05:00,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382572924] [2022-02-14 22:05:00,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:05:00,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:05:00,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:00,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:05:00,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:05:00,510 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) 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) [2022-02-14 22:05:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:00,629 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2022-02-14 22:05:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:05:00,633 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 [2022-02-14 22:05:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:00,638 INFO L225 Difference]: With dead ends: 32 [2022-02-14 22:05:00,638 INFO L226 Difference]: Without dead ends: 27 [2022-02-14 22:05:00,640 INFO L932 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 [2022-02-14 22:05:00,645 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:00,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:00,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-14 22:05:00,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-02-14 22:05:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 22:05:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2022-02-14 22:05:00,669 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2022-02-14 22:05:00,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:00,670 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2022-02-14 22:05:00,670 INFO L471 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) [2022-02-14 22:05:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2022-02-14 22:05:00,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 22:05:00,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:00,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:00,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:05:00,671 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:00,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:00,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2022-02-14 22:05:00,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:00,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560206603] [2022-02-14 22:05:00,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:00,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:00,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:05:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:05:00,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:00,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560206603] [2022-02-14 22:05:00,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560206603] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:05:00,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:05:00,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 22:05:00,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803304984] [2022-02-14 22:05:00,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:05:00,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:05:00,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:05:00,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:05:00,732 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-02-14 22:05:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:00,804 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2022-02-14 22:05:00,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:05:00,805 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 12 [2022-02-14 22:05:00,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:00,805 INFO L225 Difference]: With dead ends: 28 [2022-02-14 22:05:00,805 INFO L226 Difference]: Without dead ends: 28 [2022-02-14 22:05:00,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:05:00,807 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:00,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-14 22:05:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-14 22:05:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 22:05:00,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2022-02-14 22:05:00,813 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2022-02-14 22:05:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:00,813 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2022-02-14 22:05:00,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-02-14 22:05:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2022-02-14 22:05:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 22:05:00,814 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:00,814 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:00,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 22:05:00,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:00,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2022-02-14 22:05:00,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:00,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153104962] [2022-02-14 22:05:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:00,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:00,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:05:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:05:00,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:00,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153104962] [2022-02-14 22:05:00,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153104962] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:05:00,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:05:00,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-14 22:05:00,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629048093] [2022-02-14 22:05:00,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:05:00,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-14 22:05:00,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-14 22:05:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:05:00,903 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-02-14 22:05:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:01,021 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2022-02-14 22:05:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:05:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-02-14 22:05:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:01,023 INFO L225 Difference]: With dead ends: 32 [2022-02-14 22:05:01,023 INFO L226 Difference]: Without dead ends: 32 [2022-02-14 22:05:01,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:05:01,028 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:01,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 73 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-14 22:05:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-14 22:05:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-14 22:05:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-02-14 22:05:01,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-02-14 22:05:01,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:01,045 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-02-14 22:05:01,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-02-14 22:05:01,046 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-02-14 22:05:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 22:05:01,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:01,046 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:01,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 22:05:01,047 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:01,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:01,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2022-02-14 22:05:01,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:01,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664557521] [2022-02-14 22:05:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:01,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:01,071 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:01,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853094024] [2022-02-14 22:05:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:01,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:01,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:01,073 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) [2022-02-14 22:05:01,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 22:05:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:05:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:05:01,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:05:01,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:01,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664557521] [2022-02-14 22:05:01,221 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:01,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853094024] [2022-02-14 22:05:01,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853094024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:05:01,222 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:05:01,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:05:01,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039637822] [2022-02-14 22:05:01,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:05:01,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:05:01,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:05:01,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:05:01,226 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 22:05:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:01,271 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-02-14 22:05:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:05:01,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-02-14 22:05:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:01,272 INFO L225 Difference]: With dead ends: 48 [2022-02-14 22:05:01,272 INFO L226 Difference]: Without dead ends: 48 [2022-02-14 22:05:01,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:05:01,273 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:01,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 153 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:05:01,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-14 22:05:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-02-14 22:05:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-14 22:05:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-02-14 22:05:01,277 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 17 [2022-02-14 22:05:01,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:01,278 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-02-14 22:05:01,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 22:05:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-02-14 22:05:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-14 22:05:01,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:01,278 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:01,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:01,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:01,479 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:01,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:01,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2022-02-14 22:05:01,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:01,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685027871] [2022-02-14 22:05:01,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:01,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:01,491 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:01,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585354857] [2022-02-14 22:05:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:01,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:01,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:01,496 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) [2022-02-14 22:05:01,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 22:05:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:01,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:05:01,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:05:01,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:05:01,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:01,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685027871] [2022-02-14 22:05:01,606 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:01,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585354857] [2022-02-14 22:05:01,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585354857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:05:01,606 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:05:01,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:05:01,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162132909] [2022-02-14 22:05:01,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:05:01,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:05:01,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:01,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:05:01,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:05:01,607 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:05:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:01,640 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-02-14 22:05:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:05:01,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-02-14 22:05:01,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:01,643 INFO L225 Difference]: With dead ends: 52 [2022-02-14 22:05:01,643 INFO L226 Difference]: Without dead ends: 52 [2022-02-14 22:05:01,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:05:01,644 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:01,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 150 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:05:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-14 22:05:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2022-02-14 22:05:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-02-14 22:05:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2022-02-14 22:05:01,655 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 22 [2022-02-14 22:05:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:01,656 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2022-02-14 22:05:01,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-14 22:05:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2022-02-14 22:05:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-14 22:05:01,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:01,657 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:01,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:01,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:01,874 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:01,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2022-02-14 22:05:01,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:01,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396732777] [2022-02-14 22:05:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:01,896 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:01,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793158294] [2022-02-14 22:05:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:01,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:01,908 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) [2022-02-14 22:05:01,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 22:05:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:05:01,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 22:05:02,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:05:02,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:02,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396732777] [2022-02-14 22:05:02,046 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:02,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793158294] [2022-02-14 22:05:02,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793158294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:05:02,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:05:02,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:05:02,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145388161] [2022-02-14 22:05:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:05:02,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:05:02,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:05:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:05:02,047 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 22:05:02,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:02,093 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2022-02-14 22:05:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:05:02,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-02-14 22:05:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:02,094 INFO L225 Difference]: With dead ends: 60 [2022-02-14 22:05:02,094 INFO L226 Difference]: Without dead ends: 50 [2022-02-14 22:05:02,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:05:02,096 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:02,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 151 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:05:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-14 22:05:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-14 22:05:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:05:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2022-02-14 22:05:02,105 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 27 [2022-02-14 22:05:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:02,105 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2022-02-14 22:05:02,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 22:05:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2022-02-14 22:05:02,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 22:05:02,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:02,106 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:02,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:02,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:02,320 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2022-02-14 22:05:02,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:02,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117939543] [2022-02-14 22:05:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:02,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:02,334 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:02,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627246927] [2022-02-14 22:05:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:02,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:02,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:02,335 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) [2022-02-14 22:05:02,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 22:05:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:02,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:05:02,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-02-14 22:05:02,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 22:05:02,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:02,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117939543] [2022-02-14 22:05:02,561 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:02,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627246927] [2022-02-14 22:05:02,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627246927] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:05:02,561 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:05:02,561 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 22:05:02,561 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292794921] [2022-02-14 22:05:02,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:02,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:05:02,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:02,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:05:02,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:05:02,562 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-14 22:05:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:02,646 INFO L93 Difference]: Finished difference Result 104 states and 133 transitions. [2022-02-14 22:05:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 22:05:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 45 [2022-02-14 22:05:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:02,647 INFO L225 Difference]: With dead ends: 104 [2022-02-14 22:05:02,647 INFO L226 Difference]: Without dead ends: 104 [2022-02-14 22:05:02,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:05:02,648 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 56 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:02,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 191 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-14 22:05:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-02-14 22:05:02,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 51 states have internal predecessors, (55), 40 states have call successors, (40), 12 states have call predecessors, (40), 11 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-14 22:05:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2022-02-14 22:05:02,654 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 45 [2022-02-14 22:05:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:02,654 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2022-02-14 22:05:02,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-14 22:05:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2022-02-14 22:05:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 22:05:02,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:02,655 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:02,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:02,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:02,875 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:02,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:02,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2022-02-14 22:05:02,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:02,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283136191] [2022-02-14 22:05:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:02,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:02,895 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:02,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183402828] [2022-02-14 22:05:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:02,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:02,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:02,900 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) [2022-02-14 22:05:02,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 22:05:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:02,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:05:02,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 22:05:03,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-14 22:05:03,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:03,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283136191] [2022-02-14 22:05:03,133 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:03,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183402828] [2022-02-14 22:05:03,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183402828] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:05:03,133 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:05:03,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-14 22:05:03,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369265372] [2022-02-14 22:05:03,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:03,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:05:03,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:03,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:05:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:05:03,134 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-14 22:05:05,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:05:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:05,446 INFO L93 Difference]: Finished difference Result 128 states and 166 transitions. [2022-02-14 22:05:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:05:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 45 [2022-02-14 22:05:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:05,447 INFO L225 Difference]: With dead ends: 128 [2022-02-14 22:05:05,447 INFO L226 Difference]: Without dead ends: 128 [2022-02-14 22:05:05,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:05:05,448 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 10 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:05,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 280 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 141 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-02-14 22:05:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-14 22:05:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 118. [2022-02-14 22:05:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-14 22:05:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-02-14 22:05:05,455 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 45 [2022-02-14 22:05:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:05,457 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-02-14 22:05:05,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-02-14 22:05:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-02-14 22:05:05,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 22:05:05,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:05,458 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:05,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:05,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:05,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:05,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2022-02-14 22:05:05,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:05,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802644573] [2022-02-14 22:05:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:05,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:05,665 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:05,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482635019] [2022-02-14 22:05:05,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:05:05,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:05,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:05,684 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) [2022-02-14 22:05:05,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 22:05:05,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:05:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:05:05,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:05:05,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 22:05:05,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-02-14 22:05:05,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:05,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802644573] [2022-02-14 22:05:05,922 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:05,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482635019] [2022-02-14 22:05:05,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482635019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:05:05,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:05:05,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-14 22:05:05,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147242229] [2022-02-14 22:05:05,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:05,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:05:05,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:05:05,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:05:05,923 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-14 22:05:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:05,986 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2022-02-14 22:05:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 22:05:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 50 [2022-02-14 22:05:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:05,988 INFO L225 Difference]: With dead ends: 122 [2022-02-14 22:05:05,988 INFO L226 Difference]: Without dead ends: 122 [2022-02-14 22:05:05,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-14 22:05:05,989 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:05,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 303 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-14 22:05:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-02-14 22:05:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 67 states have internal predecessors, (70), 42 states have call successors, (42), 17 states have call predecessors, (42), 16 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2022-02-14 22:05:05,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2022-02-14 22:05:05,996 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 50 [2022-02-14 22:05:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:05,996 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2022-02-14 22:05:05,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-02-14 22:05:05,996 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2022-02-14 22:05:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-14 22:05:05,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:05,997 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:06,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:06,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:06,217 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:06,218 INFO L85 PathProgramCache]: Analyzing trace with hash -895540175, now seen corresponding path program 3 times [2022-02-14 22:05:06,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:06,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618673670] [2022-02-14 22:05:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:06,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:06,226 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:06,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527136514] [2022-02-14 22:05:06,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:05:06,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:06,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:06,237 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) [2022-02-14 22:05:06,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 22:05:06,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-14 22:05:06,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:05:06,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 22:05:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 22:05:06,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-02-14 22:05:06,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:06,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618673670] [2022-02-14 22:05:06,578 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:06,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527136514] [2022-02-14 22:05:06,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527136514] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:05:06,578 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:05:06,578 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-02-14 22:05:06,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195062874] [2022-02-14 22:05:06,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:06,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:05:06,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:06,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:05:06,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:05:06,579 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-14 22:05:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:06,730 INFO L93 Difference]: Finished difference Result 142 states and 165 transitions. [2022-02-14 22:05:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 22:05:06,730 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 55 [2022-02-14 22:05:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:06,731 INFO L225 Difference]: With dead ends: 142 [2022-02-14 22:05:06,731 INFO L226 Difference]: Without dead ends: 133 [2022-02-14 22:05:06,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:05:06,732 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:06,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 192 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-14 22:05:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-02-14 22:05:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 78 states have (on average 1.0897435897435896) internal successors, (85), 82 states have internal predecessors, (85), 33 states have call successors, (33), 22 states have call predecessors, (33), 21 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-14 22:05:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2022-02-14 22:05:06,738 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 55 [2022-02-14 22:05:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:06,738 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2022-02-14 22:05:06,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-02-14 22:05:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2022-02-14 22:05:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-14 22:05:06,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:06,739 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:06,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:06,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:06,940 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:06,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2022-02-14 22:05:06,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:06,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504286154] [2022-02-14 22:05:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:06,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:06,947 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:06,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514206251] [2022-02-14 22:05:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:06,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:06,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:06,948 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:06,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 22:05:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:06,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 22:05:06,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 22:05:07,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-02-14 22:05:07,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:07,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504286154] [2022-02-14 22:05:07,765 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:07,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514206251] [2022-02-14 22:05:07,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514206251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:05:07,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:05:07,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-02-14 22:05:07,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129603661] [2022-02-14 22:05:07,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:07,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:05:07,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:05:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:05:07,766 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-14 22:05:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:08,016 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2022-02-14 22:05:08,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 22:05:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 71 [2022-02-14 22:05:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:08,020 INFO L225 Difference]: With dead ends: 144 [2022-02-14 22:05:08,020 INFO L226 Difference]: Without dead ends: 142 [2022-02-14 22:05:08,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:05:08,021 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 11 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:08,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 256 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:08,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-14 22:05:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-02-14 22:05:08,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 83 states have (on average 1.072289156626506) internal successors, (89), 86 states have internal predecessors, (89), 33 states have call successors, (33), 24 states have call predecessors, (33), 22 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-02-14 22:05:08,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2022-02-14 22:05:08,040 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 71 [2022-02-14 22:05:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:08,040 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2022-02-14 22:05:08,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2022-02-14 22:05:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2022-02-14 22:05:08,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-14 22:05:08,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:08,044 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:08,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:08,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-14 22:05:08,260 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:08,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:08,260 INFO L85 PathProgramCache]: Analyzing trace with hash -601883655, now seen corresponding path program 1 times [2022-02-14 22:05:08,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:08,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803343177] [2022-02-14 22:05:08,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:08,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:08,266 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:08,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908285134] [2022-02-14 22:05:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:08,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:08,277 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:08,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 22:05:08,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:05:08,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 22:05:08,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-02-14 22:05:08,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:08,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:08,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803343177] [2022-02-14 22:05:08,990 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:08,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908285134] [2022-02-14 22:05:08,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908285134] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:05:08,990 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:05:08,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-14 22:05:08,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68499654] [2022-02-14 22:05:08,991 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:08,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:05:08,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:05:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:05:08,991 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-14 22:05:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:09,084 INFO L93 Difference]: Finished difference Result 139 states and 150 transitions. [2022-02-14 22:05:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 22:05:09,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-02-14 22:05:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:09,085 INFO L225 Difference]: With dead ends: 139 [2022-02-14 22:05:09,085 INFO L226 Difference]: Without dead ends: 130 [2022-02-14 22:05:09,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:05:09,086 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:09,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 229 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-14 22:05:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-02-14 22:05:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.064102564102564) internal successors, (83), 81 states have internal predecessors, (83), 30 states have call successors, (30), 22 states have call predecessors, (30), 21 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-14 22:05:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 140 transitions. [2022-02-14 22:05:09,089 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 140 transitions. Word has length 76 [2022-02-14 22:05:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:09,090 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 140 transitions. [2022-02-14 22:05:09,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-14 22:05:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 140 transitions. [2022-02-14 22:05:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-14 22:05:09,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:09,091 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:09,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:09,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:09,309 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1157335722, now seen corresponding path program 4 times [2022-02-14 22:05:09,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:09,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342508353] [2022-02-14 22:05:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:09,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:09,315 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:09,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363637377] [2022-02-14 22:05:09,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 22:05:09,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:09,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:09,318 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:09,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-14 22:05:10,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 22:05:10,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:05:10,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 59 conjunts are in the unsatisfiable core [2022-02-14 22:05:10,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 86 proven. 46 refuted. 4 times theorem prover too weak. 170 trivial. 0 not checked. [2022-02-14 22:05:40,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-02-14 22:05:41,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:41,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342508353] [2022-02-14 22:05:41,164 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:41,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363637377] [2022-02-14 22:05:41,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363637377] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:05:41,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:05:41,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 15 [2022-02-14 22:05:41,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564194286] [2022-02-14 22:05:41,165 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:41,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 22:05:41,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:41,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 22:05:41,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=149, Unknown=8, NotChecked=0, Total=210 [2022-02-14 22:05:41,166 INFO L87 Difference]: Start difference. First operand 130 states and 140 transitions. Second operand has 15 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-02-14 22:05:43,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:05:49,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:49,635 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2022-02-14 22:05:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-14 22:05:49,636 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 78 [2022-02-14 22:05:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:49,636 INFO L225 Difference]: With dead ends: 138 [2022-02-14 22:05:49,637 INFO L226 Difference]: Without dead ends: 136 [2022-02-14 22:05:49,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 137 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=66, Invalid=198, Unknown=8, NotChecked=0, Total=272 [2022-02-14 22:05:49,637 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:49,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 95 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 55 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-02-14 22:05:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-14 22:05:49,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-02-14 22:05:49,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 85 states have internal predecessors, (87), 30 states have call successors, (30), 24 states have call predecessors, (30), 22 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-02-14 22:05:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2022-02-14 22:05:49,641 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 78 [2022-02-14 22:05:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:49,641 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2022-02-14 22:05:49,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-02-14 22:05:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2022-02-14 22:05:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-14 22:05:49,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:49,642 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:49,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-02-14 22:05:49,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-02-14 22:05:49,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash -821976909, now seen corresponding path program 2 times [2022-02-14 22:05:49,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:49,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819859584] [2022-02-14 22:05:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:49,861 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:49,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903826494] [2022-02-14 22:05:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:05:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:49,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:49,865 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:49,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-14 22:05:49,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:05:49,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:05:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-14 22:05:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-02-14 22:05:50,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:50,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:50,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819859584] [2022-02-14 22:05:50,346 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:50,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903826494] [2022-02-14 22:05:50,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903826494] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:05:50,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:05:50,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-02-14 22:05:50,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681086894] [2022-02-14 22:05:50,346 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:50,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:05:50,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:50,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:05:50,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:05:50,347 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-14 22:05:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:50,442 INFO L93 Difference]: Finished difference Result 136 states and 143 transitions. [2022-02-14 22:05:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-14 22:05:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 104 [2022-02-14 22:05:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:50,443 INFO L225 Difference]: With dead ends: 136 [2022-02-14 22:05:50,443 INFO L226 Difference]: Without dead ends: 127 [2022-02-14 22:05:50,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-14 22:05:50,444 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 6 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:50,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 277 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-14 22:05:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-02-14 22:05:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 80 states have internal predecessors, (81), 27 states have call successors, (27), 22 states have call predecessors, (27), 21 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-14 22:05:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 133 transitions. [2022-02-14 22:05:50,447 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 133 transitions. Word has length 104 [2022-02-14 22:05:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:50,447 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 133 transitions. [2022-02-14 22:05:50,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-02-14 22:05:50,448 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 133 transitions. [2022-02-14 22:05:50,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-14 22:05:50,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:50,449 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:50,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:50,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-02-14 22:05:50,659 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1992307858, now seen corresponding path program 2 times [2022-02-14 22:05:50,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:50,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698603398] [2022-02-14 22:05:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:50,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:50,669 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:50,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745275477] [2022-02-14 22:05:50,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:05:50,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:50,671 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:50,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-14 22:05:50,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:05:50,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:05:50,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-14 22:05:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 42 proven. 48 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-02-14 22:05:51,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:51,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:51,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698603398] [2022-02-14 22:05:51,323 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:51,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745275477] [2022-02-14 22:05:51,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745275477] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:05:51,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:05:51,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-14 22:05:51,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492408779] [2022-02-14 22:05:51,323 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:51,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:05:51,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:51,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:05:51,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:05:51,324 INFO L87 Difference]: Start difference. First operand 127 states and 133 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-02-14 22:05:51,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:51,460 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2022-02-14 22:05:51,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:05:51,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 127 [2022-02-14 22:05:51,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:51,481 INFO L225 Difference]: With dead ends: 146 [2022-02-14 22:05:51,481 INFO L226 Difference]: Without dead ends: 146 [2022-02-14 22:05:51,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:05:51,481 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:51,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 371 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-14 22:05:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-02-14 22:05:51,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 90 states have internal predecessors, (92), 32 states have call successors, (32), 25 states have call predecessors, (32), 24 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 22:05:51,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2022-02-14 22:05:51,485 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 127 [2022-02-14 22:05:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:51,485 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2022-02-14 22:05:51,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-02-14 22:05:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2022-02-14 22:05:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-14 22:05:51,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:51,486 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:51,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-14 22:05:51,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-02-14 22:05:51,695 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:51,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1089028459, now seen corresponding path program 2 times [2022-02-14 22:05:51,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:51,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778174895] [2022-02-14 22:05:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:51,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:51,708 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:51,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122683756] [2022-02-14 22:05:51,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:05:51,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:51,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:51,712 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:51,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-14 22:05:51,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 22:05:51,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:05:51,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:05:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-02-14 22:05:51,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:52,166 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-02-14 22:05:52,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:52,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778174895] [2022-02-14 22:05:52,167 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:52,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122683756] [2022-02-14 22:05:52,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122683756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:05:52,167 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:05:52,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-02-14 22:05:52,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575573675] [2022-02-14 22:05:52,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:52,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:05:52,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:05:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:05:52,168 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2022-02-14 22:05:52,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:52,253 INFO L93 Difference]: Finished difference Result 158 states and 165 transitions. [2022-02-14 22:05:52,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-14 22:05:52,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) Word has length 129 [2022-02-14 22:05:52,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:52,254 INFO L225 Difference]: With dead ends: 158 [2022-02-14 22:05:52,254 INFO L226 Difference]: Without dead ends: 156 [2022-02-14 22:05:52,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:05:52,255 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:52,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:52,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-14 22:05:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 154. [2022-02-14 22:05:52,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 33 states have call successors, (33), 27 states have call predecessors, (33), 25 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 22:05:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2022-02-14 22:05:52,258 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 129 [2022-02-14 22:05:52,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:52,258 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2022-02-14 22:05:52,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 7 states have call successors, (45), 7 states have call predecessors, (45), 7 states have return successors, (43), 6 states have call predecessors, (43), 6 states have call successors, (43) [2022-02-14 22:05:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2022-02-14 22:05:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-14 22:05:52,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:52,259 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:52,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-02-14 22:05:52,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-02-14 22:05:52,460 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:52,460 INFO L85 PathProgramCache]: Analyzing trace with hash -925808019, now seen corresponding path program 3 times [2022-02-14 22:05:52,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:52,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985393435] [2022-02-14 22:05:52,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:52,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:52,472 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:52,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817946483] [2022-02-14 22:05:52,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:05:52,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:52,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:52,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:52,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-14 22:05:52,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-14 22:05:52,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:05:52,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-14 22:05:52,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-02-14 22:05:53,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:53,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:53,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985393435] [2022-02-14 22:05:53,510 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:53,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817946483] [2022-02-14 22:05:53,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817946483] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:05:53,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:05:53,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-14 22:05:53,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361811594] [2022-02-14 22:05:53,510 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:53,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-14 22:05:53,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:53,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-14 22:05:53,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:05:53,511 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-02-14 22:05:53,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:53,629 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2022-02-14 22:05:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:05:53,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 132 [2022-02-14 22:05:53,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:53,630 INFO L225 Difference]: With dead ends: 158 [2022-02-14 22:05:53,630 INFO L226 Difference]: Without dead ends: 149 [2022-02-14 22:05:53,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:05:53,631 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:53,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 372 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 22:05:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-14 22:05:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-02-14 22:05:53,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 93 states have (on average 1.032258064516129) internal successors, (96), 94 states have internal predecessors, (96), 30 states have call successors, (30), 26 states have call predecessors, (30), 25 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-02-14 22:05:53,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 154 transitions. [2022-02-14 22:05:53,634 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 154 transitions. Word has length 132 [2022-02-14 22:05:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:53,635 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 154 transitions. [2022-02-14 22:05:53,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-02-14 22:05:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 154 transitions. [2022-02-14 22:05:53,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-14 22:05:53,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:53,637 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:53,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:53,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:53,838 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:53,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:53,838 INFO L85 PathProgramCache]: Analyzing trace with hash 386125940, now seen corresponding path program 3 times [2022-02-14 22:05:53,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:53,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777303903] [2022-02-14 22:05:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:53,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:53,844 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:53,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270157261] [2022-02-14 22:05:53,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:05:53,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:53,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:53,847 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:53,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-14 22:05:54,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-14 22:05:54,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:05:54,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:05:54,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:05:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 143 proven. 16 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2022-02-14 22:05:54,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:05:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 143 proven. 16 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2022-02-14 22:05:55,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:05:55,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777303903] [2022-02-14 22:05:55,318 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:05:55,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270157261] [2022-02-14 22:05:55,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270157261] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:05:55,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:05:55,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-02-14 22:05:55,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200381595] [2022-02-14 22:05:55,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:05:55,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-14 22:05:55,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:05:55,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-14 22:05:55,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:05:55,320 INFO L87 Difference]: Start difference. First operand 149 states and 154 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) [2022-02-14 22:05:57,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:05:59,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:05:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:05:59,505 INFO L93 Difference]: Finished difference Result 156 states and 162 transitions. [2022-02-14 22:05:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:05:59,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) Word has length 155 [2022-02-14 22:05:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:05:59,506 INFO L225 Difference]: With dead ends: 156 [2022-02-14 22:05:59,506 INFO L226 Difference]: Without dead ends: 156 [2022-02-14 22:05:59,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-14 22:05:59,506 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 19 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:05:59,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 203 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 201 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-02-14 22:05:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-14 22:05:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-02-14 22:05:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 96 states have (on average 1.03125) internal successors, (99), 98 states have internal predecessors, (99), 32 states have call successors, (32), 27 states have call predecessors, (32), 26 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-02-14 22:05:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2022-02-14 22:05:59,511 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 155 [2022-02-14 22:05:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:05:59,512 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2022-02-14 22:05:59,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 6 states have call successors, (17) [2022-02-14 22:05:59,513 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2022-02-14 22:05:59,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-14 22:05:59,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:05:59,514 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:05:59,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-14 22:05:59,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-14 22:05:59,715 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:05:59,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:05:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1841306865, now seen corresponding path program 3 times [2022-02-14 22:05:59,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:05:59,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078938374] [2022-02-14 22:05:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:05:59,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:05:59,723 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:05:59,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633522952] [2022-02-14 22:05:59,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 22:05:59,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:05:59,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:05:59,726 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:05:59,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-14 22:06:00,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-02-14 22:06:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-02-14 22:06:00,094 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-14 22:06:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-14 22:06:00,159 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-14 22:06:00,159 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-14 22:06:00,160 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 22:06:00,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-14 22:06:00,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:06:00,368 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-02-14 22:06:00,370 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 22:06:00,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:06:00 BasicIcfg [2022-02-14 22:06:00,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 22:06:00,412 INFO L158 Benchmark]: Toolchain (without parser) took 60645.64ms. Allocated memory was 222.3MB in the beginning and 349.2MB in the end (delta: 126.9MB). Free memory was 169.5MB in the beginning and 237.4MB in the end (delta: -67.8MB). Peak memory consumption was 59.8MB. Max. memory is 8.0GB. [2022-02-14 22:06:00,412 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 222.3MB. Free memory is still 186.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 22:06:00,412 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.56ms. Allocated memory was 222.3MB in the beginning and 290.5MB in the end (delta: 68.2MB). Free memory was 169.4MB in the beginning and 264.1MB in the end (delta: -94.8MB). Peak memory consumption was 7.2MB. Max. memory is 8.0GB. [2022-02-14 22:06:00,412 INFO L158 Benchmark]: Boogie Preprocessor took 23.27ms. Allocated memory is still 290.5MB. Free memory was 264.1MB in the beginning and 262.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 22:06:00,412 INFO L158 Benchmark]: RCFGBuilder took 302.40ms. Allocated memory is still 290.5MB. Free memory was 262.7MB in the beginning and 251.9MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-14 22:06:00,413 INFO L158 Benchmark]: IcfgTransformer took 15.00ms. Allocated memory is still 290.5MB. Free memory was 251.9MB in the beginning and 250.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-14 22:06:00,413 INFO L158 Benchmark]: TraceAbstraction took 60086.13ms. Allocated memory was 290.5MB in the beginning and 349.2MB in the end (delta: 58.7MB). Free memory was 250.1MB in the beginning and 237.4MB in the end (delta: 12.7MB). Peak memory consumption was 72.5MB. Max. memory is 8.0GB. [2022-02-14 22:06:00,414 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 222.3MB. Free memory is still 186.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 213.56ms. Allocated memory was 222.3MB in the beginning and 290.5MB in the end (delta: 68.2MB). Free memory was 169.4MB in the beginning and 264.1MB in the end (delta: -94.8MB). Peak memory consumption was 7.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.27ms. Allocated memory is still 290.5MB. Free memory was 264.1MB in the beginning and 262.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 302.40ms. Allocated memory is still 290.5MB. Free memory was 262.7MB in the beginning and 251.9MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 15.00ms. Allocated memory is still 290.5MB. Free memory was 251.9MB in the beginning and 250.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 60086.13ms. Allocated memory was 290.5MB in the beginning and 349.2MB in the end (delta: 58.7MB). Free memory was 250.1MB in the beginning and 237.4MB in the end (delta: 12.7MB). Peak memory consumption was 72.5MB. 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 - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=10, counter=0] [L24] short a; [L25] long long n, x, y, z; [L26] a = __VERIFIER_nondet_ushort() [L28] n = 0 [L29] x = 0 [L30] y = 1 [L31] z = 6 VAL [\old(counter)=0, a=5, counter=0, n=0, x=0, y=1, z=6] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=1, counter++=0, n=0, x=0, y=1, z=6] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=1, n=0, x=0, y=1, z=6] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=1, n=1, x=1, y=7, z=12] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=2, counter++=1, n=1, x=1, y=7, z=12] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=2, n=1, x=1, y=7, z=12] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=2, n=2, x=8, y=19, z=18] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=3, counter++=2, n=2, x=8, y=19, z=18] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=3, n=2, x=8, y=19, z=18] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=3, n=3, x=27, y=37, z=24] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=4, counter++=3, n=3, x=27, y=37, z=24] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=4, n=3, x=27, y=37, z=24] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=4, n=4, x=64, y=61, z=30] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=5, counter++=4, n=4, x=64, y=61, z=30] [L33] COND TRUE counter++<5 [L34] CALL __VERIFIER_assert(z == 6 * n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L34] RET __VERIFIER_assert(z == 6 * n + 6) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L35] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L35] RET __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L36] CALL __VERIFIER_assert(x == n * n * n) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L36] RET __VERIFIER_assert(x == n * n * n) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L37] CALL __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y*z - 18*x - 12*y + 2*z - 6 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L38] CALL __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L38] RET __VERIFIER_assert((z*z) - 12*y - 6*z + 12 == 0) VAL [\old(counter)=0, a=5, counter=5, n=4, x=64, y=61, z=30] [L39] COND FALSE !(!(n <= a)) [L42] n = n + 1 [L43] x = x + y [L44] y = y + z [L45] z = z + 6 VAL [\old(counter)=0, a=5, counter=5, n=5, x=125, y=91, z=36] [L33] EXPR counter++ VAL [\old(counter)=0, a=5, counter=6, counter++=5, n=5, x=125, y=91, z=36] [L33] COND FALSE !(counter++<5) [L48] CALL __VERIFIER_assert(z == 6*n + 6) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L48] RET __VERIFIER_assert(z == 6*n + 6) VAL [\old(counter)=0, a=5, counter=6, n=5, x=125, y=91, z=36] [L49] CALL __VERIFIER_assert(6*a*x - x*z + 12*x == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 60.0s, OverallIterations: 19, TraceHistogramMax: 27, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 16.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 289 SdHoareTripleChecker+Valid, 9.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 220 mSDsluCounter, 3575 SdHoareTripleChecker+Invalid, 9.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2764 mSDsCounter, 272 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1721 IncrementalHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 272 mSolverCounterUnsat, 811 mSDtfsCounter, 1721 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1973 GetRequests, 1803 SyntacticMatches, 17 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 33.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=18, InterpolantAutomatonStates: 134, 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, 18 MinimizatonAttempts, 36 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 36.6s InterpolantComputationTime, 1325 NumberOfCodeBlocks, 1115 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1770 ConstructedInterpolants, 0 QuantifiedInterpolants, 7528 SizeOfPredicates, 43 NumberOfNonLiveVariables, 2551 ConjunctsInSsa, 282 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 8520/9498 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 RESULT: Ultimate proved your program to be incorrect! [2022-02-14 22:06:00,428 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...