/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/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:11:47,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:11:47,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:11:47,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:11:47,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:11:47,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:11:47,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:11:47,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:11:47,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:11:47,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:11:47,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:11:47,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:11:47,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:11:47,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:11:47,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:11:47,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:11:47,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:11:47,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:11:47,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:11:47,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:11:47,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:11:47,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:11:47,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:11:47,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:11:47,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:11:47,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 18:11:47,963 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 18:11:47,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 18:11:47,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 18:11:47,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 18:11:47,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 18:11:47,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 18:11:47,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 18:11:47,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:11:47,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:11:47,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:11:47,968 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:11:47,976 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:11:47,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:11:47,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:11:47,977 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:11:47,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:11:47,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:11:47,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:11:47,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:11:47,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:11:47,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:11:47,978 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:11:47,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:11:47,978 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:11:47,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:11:47,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:11:47,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:11:47,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:11:47,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:11:47,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:11:47,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:11:47,980 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:11:47,980 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:11:47,980 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:11:48,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:11:48,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:11:48,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:11:48,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:11:48,209 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:11:48,210 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-02-23 18:11:48,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/460a6ea25/15ea93785eb9471680ba4fe0f3bfa905/FLAGa165eb9e2 [2022-02-23 18:11:48,575 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:11:48,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-02-23 18:11:48,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/460a6ea25/15ea93785eb9471680ba4fe0f3bfa905/FLAGa165eb9e2 [2022-02-23 18:11:49,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/460a6ea25/15ea93785eb9471680ba4fe0f3bfa905 [2022-02-23 18:11:49,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:11:49,017 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:11:49,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:11:49,019 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:11:49,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:11:49,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44266895 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49, skipping insertion in model container [2022-02-23 18:11:49,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:11:49,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:11:49,176 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/egcd3-ll_valuebound10.c[490,503] [2022-02-23 18:11:49,206 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:11:49,215 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:11:49,224 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/egcd3-ll_valuebound10.c[490,503] [2022-02-23 18:11:49,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:11:49,256 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:11:49,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49 WrapperNode [2022-02-23 18:11:49,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:11:49,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:11:49,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:11:49,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:11:49,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:11:49,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:11:49,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:11:49,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:11:49,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:11:49,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:49,318 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) [2022-02-23 18:11:49,320 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 [2022-02-23 18:11:49,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:11:49,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:11:49,342 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:11:49,342 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:11:49,342 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:11:49,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:11:49,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:11:49,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:11:49,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:11:49,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:11:49,396 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:11:49,397 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:11:49,495 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:11:49,499 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:11:49,499 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-23 18:11:49,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:11:49 BoogieIcfgContainer [2022-02-23 18:11:49,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:11:49,501 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:11:49,502 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:11:49,502 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:11:49,518 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:11:49" (1/1) ... [2022-02-23 18:11:49,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:11:49 BasicIcfg [2022-02-23 18:11:49,532 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:11:49,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:11:49,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:11:49,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:11:49,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:11:49" (1/4) ... [2022-02-23 18:11:49,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7f4910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:11:49, skipping insertion in model container [2022-02-23 18:11:49,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:11:49" (2/4) ... [2022-02-23 18:11:49,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7f4910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:11:49, skipping insertion in model container [2022-02-23 18:11:49,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:11:49" (3/4) ... [2022-02-23 18:11:49,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7f4910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:11:49, skipping insertion in model container [2022-02-23 18:11:49,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:11:49" (4/4) ... [2022-02-23 18:11:49,537 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.cJordan [2022-02-23 18:11:49,541 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:11:49,541 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:11:49,577 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:11:49,582 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 [2022-02-23 18:11:49,583 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:11:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 18:11:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 18:11:49,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:49,612 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:49,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:49,640 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-02-23 18:11:49,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:49,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711538954] [2022-02-23 18:11:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:49,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:49,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:11:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:49,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:11:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:49,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 18:11:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:49,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 18:11:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 18:11:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:11:49,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:49,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711538954] [2022-02-23 18:11:49,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711538954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:11:49,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:11:49,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:11:49,863 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834693386] [2022-02-23 18:11:49,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:11:49,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:11:49,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:49,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:11:49,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:11:49,895 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:11:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:49,961 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-02-23 18:11:49,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:11:49,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-02-23 18:11:49,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:49,982 INFO L225 Difference]: With dead ends: 40 [2022-02-23 18:11:49,982 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 18:11:49,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:11:49,989 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:49,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:11:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 18:11:50,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 18:11:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 18:11:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-02-23 18:11:50,023 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-02-23 18:11:50,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:50,023 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-02-23 18:11:50,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:11:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-02-23 18:11:50,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 18:11:50,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:50,025 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:50,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:11:50,025 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:50,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:50,025 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-02-23 18:11:50,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:50,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637044871] [2022-02-23 18:11:50,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:50,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:50,040 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:50,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351716370] [2022-02-23 18:11:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:50,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:50,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:50,042 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) [2022-02-23 18:11:50,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 18:11:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:11:50,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 18:11:50,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:11:50,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:50,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637044871] [2022-02-23 18:11:50,236 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:50,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351716370] [2022-02-23 18:11:50,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351716370] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:11:50,236 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:11:50,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 18:11:50,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910435870] [2022-02-23 18:11:50,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:11:50,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 18:11:50,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:50,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 18:11:50,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:11:50,238 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:11:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:50,315 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-02-23 18:11:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:11:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-02-23 18:11:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:50,316 INFO L225 Difference]: With dead ends: 47 [2022-02-23 18:11:50,316 INFO L226 Difference]: Without dead ends: 47 [2022-02-23 18:11:50,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-23 18:11:50,317 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:50,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:11:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-23 18:11:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-02-23 18:11:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 18:11:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-02-23 18:11:50,331 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-02-23 18:11:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:50,332 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-02-23 18:11:50,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:11:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-02-23 18:11:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-23 18:11:50,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:50,333 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:50,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 18:11:50,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:50,534 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:50,534 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-02-23 18:11:50,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:50,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670895409] [2022-02-23 18:11:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:50,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:50,563 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:50,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118976486] [2022-02-23 18:11:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:50,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:50,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:50,568 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) [2022-02-23 18:11:50,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 18:11:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 18:11:50,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:50,838 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:11:50,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:11:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:11:50,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:50,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670895409] [2022-02-23 18:11:50,970 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:50,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118976486] [2022-02-23 18:11:50,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118976486] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:11:50,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:11:50,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 18:11:50,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140457020] [2022-02-23 18:11:50,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:11:50,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:11:50,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:11:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:11:50,973 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:11:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:51,005 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-02-23 18:11:51,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:11:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-02-23 18:11:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:51,008 INFO L225 Difference]: With dead ends: 51 [2022-02-23 18:11:51,008 INFO L226 Difference]: Without dead ends: 51 [2022-02-23 18:11:51,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:11:51,011 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:51,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 161 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:11:51,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-23 18:11:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-02-23 18:11:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 18:11:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-02-23 18:11:51,016 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-02-23 18:11:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:51,016 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-02-23 18:11:51,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:11:51,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-02-23 18:11:51,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-23 18:11:51,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:51,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2022-02-23 18:11:51,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 18:11:51,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-23 18:11:51,234 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-02-23 18:11:51,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:51,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50716987] [2022-02-23 18:11:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:51,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:51,250 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:51,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909671622] [2022-02-23 18:11:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:51,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:51,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:51,254 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) [2022-02-23 18:11:51,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 18:11:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:11:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 18:11:51,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:11:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 18:11:51,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:51,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50716987] [2022-02-23 18:11:51,500 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:51,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909671622] [2022-02-23 18:11:51,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909671622] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:11:51,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:11:51,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 18:11:51,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595973261] [2022-02-23 18:11:51,500 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:11:51,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:11:51,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:11:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:11:51,501 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:11:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:51,624 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-02-23 18:11:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:11:51,625 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-02-23 18:11:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:51,626 INFO L225 Difference]: With dead ends: 96 [2022-02-23 18:11:51,626 INFO L226 Difference]: Without dead ends: 96 [2022-02-23 18:11:51,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:11:51,627 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:51,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 249 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:11:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-23 18:11:51,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-02-23 18:11:51,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 18:11:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-02-23 18:11:51,634 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-02-23 18:11:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:51,635 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-02-23 18:11:51,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 18:11:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-02-23 18:11:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 18:11:51,635 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:51,635 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2022-02-23 18:11:51,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 18:11:51,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:51,852 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:51,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-02-23 18:11:51,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:51,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606330634] [2022-02-23 18:11:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:51,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:51,865 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:51,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357167166] [2022-02-23 18:11:51,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:51,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:51,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:51,867 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) [2022-02-23 18:11:51,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 18:11:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 18:11:51,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:11:52,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:11:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:11:52,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:52,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606330634] [2022-02-23 18:11:52,369 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:52,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357167166] [2022-02-23 18:11:52,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357167166] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:11:52,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:11:52,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-02-23 18:11:52,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094834195] [2022-02-23 18:11:52,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:11:52,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 18:11:52,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:52,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 18:11:52,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:11:52,371 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 18:11:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:52,423 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-02-23 18:11:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:11:52,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-02-23 18:11:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:52,424 INFO L225 Difference]: With dead ends: 77 [2022-02-23 18:11:52,425 INFO L226 Difference]: Without dead ends: 77 [2022-02-23 18:11:52,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:11:52,425 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:52,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:11:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-23 18:11:52,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-02-23 18:11:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-02-23 18:11:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-02-23 18:11:52,431 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-02-23 18:11:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:52,432 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-02-23 18:11:52,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-02-23 18:11:52,432 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-02-23 18:11:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-23 18:11:52,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:52,432 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:52,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 18:11:52,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:52,636 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:52,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-02-23 18:11:52,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:52,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22545172] [2022-02-23 18:11:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:52,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:52,650 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:52,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [557773592] [2022-02-23 18:11:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:52,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:52,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:52,656 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) [2022-02-23 18:11:52,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 18:11:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:52,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-23 18:11:52,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 18:11:52,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:11:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:11:53,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:53,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22545172] [2022-02-23 18:11:53,156 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:53,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557773592] [2022-02-23 18:11:53,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557773592] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:11:53,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:11:53,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2022-02-23 18:11:53,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506629636] [2022-02-23 18:11:53,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:11:53,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:11:53,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:53,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:11:53,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:11:53,158 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:11:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:53,515 INFO L93 Difference]: Finished difference Result 116 states and 157 transitions. [2022-02-23 18:11:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 18:11:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 42 [2022-02-23 18:11:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:53,517 INFO L225 Difference]: With dead ends: 116 [2022-02-23 18:11:53,517 INFO L226 Difference]: Without dead ends: 116 [2022-02-23 18:11:53,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-02-23 18:11:53,518 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 93 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:53,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 370 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:11:53,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-23 18:11:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2022-02-23 18:11:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 18:11:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2022-02-23 18:11:53,525 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2022-02-23 18:11:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:53,525 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2022-02-23 18:11:53,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:11:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2022-02-23 18:11:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 18:11:53,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:53,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 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, 1, 1, 1, 1] [2022-02-23 18:11:53,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 18:11:53,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:53,728 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:53,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:53,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-02-23 18:11:53,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:53,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331681610] [2022-02-23 18:11:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:53,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:53,736 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:53,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585268023] [2022-02-23 18:11:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:53,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:53,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:53,740 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) [2022-02-23 18:11:53,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 18:11:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:11:53,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-02-23 18:11:53,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:11:53,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:53,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331681610] [2022-02-23 18:11:53,846 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:53,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585268023] [2022-02-23 18:11:53,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585268023] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:11:53,846 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:11:53,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:11:53,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359434066] [2022-02-23 18:11:53,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:11:53,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:11:53,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:53,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:11:53,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:11:53,847 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:11:53,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:53,874 INFO L93 Difference]: Finished difference Result 149 states and 211 transitions. [2022-02-23 18:11:53,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:11:53,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-02-23 18:11:53,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:53,876 INFO L225 Difference]: With dead ends: 149 [2022-02-23 18:11:53,876 INFO L226 Difference]: Without dead ends: 149 [2022-02-23 18:11:53,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:11:53,877 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:53,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:11:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-23 18:11:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 143. [2022-02-23 18:11:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 88 states have (on average 1.2840909090909092) internal successors, (113), 89 states have internal predecessors, (113), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-02-23 18:11:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2022-02-23 18:11:53,886 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 47 [2022-02-23 18:11:53,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:53,886 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2022-02-23 18:11:53,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:11:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2022-02-23 18:11:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 18:11:53,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:53,887 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:53,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-23 18:11:54,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:54,092 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash -846684234, now seen corresponding path program 1 times [2022-02-23 18:11:54,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:54,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628652279] [2022-02-23 18:11:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:54,101 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:54,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112739698] [2022-02-23 18:11:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:54,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:54,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:54,107 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) [2022-02-23 18:11:54,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 18:11:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:54,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 18:11:54,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-23 18:11:54,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:11:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:11:54,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:54,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628652279] [2022-02-23 18:11:54,602 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:54,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112739698] [2022-02-23 18:11:54,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112739698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:11:54,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:11:54,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 17 [2022-02-23 18:11:54,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298219598] [2022-02-23 18:11:54,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:11:54,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 18:11:54,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:54,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 18:11:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:11:54,604 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-23 18:11:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:57,415 INFO L93 Difference]: Finished difference Result 188 states and 263 transitions. [2022-02-23 18:11:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 18:11:57,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 47 [2022-02-23 18:11:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:57,418 INFO L225 Difference]: With dead ends: 188 [2022-02-23 18:11:57,418 INFO L226 Difference]: Without dead ends: 188 [2022-02-23 18:11:57,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-02-23 18:11:57,444 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:57,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 344 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-23 18:11:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-23 18:11:57,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 179. [2022-02-23 18:11:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 118 states have internal predecessors, (142), 56 states have call successors, (56), 10 states have call predecessors, (56), 9 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-02-23 18:11:57,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 252 transitions. [2022-02-23 18:11:57,474 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 252 transitions. Word has length 47 [2022-02-23 18:11:57,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:57,475 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 252 transitions. [2022-02-23 18:11:57,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-23 18:11:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 252 transitions. [2022-02-23 18:11:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-23 18:11:57,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:57,476 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:57,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-23 18:11:57,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:57,691 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:57,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1679656732, now seen corresponding path program 2 times [2022-02-23 18:11:57,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:57,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493542992] [2022-02-23 18:11:57,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:57,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:57,699 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:57,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108590896] [2022-02-23 18:11:57,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:11:57,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:57,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:57,701 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) [2022-02-23 18:11:57,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 18:11:57,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:11:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:11:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:11:57,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 18:11:57,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:11:57,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:57,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493542992] [2022-02-23 18:11:57,828 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:57,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108590896] [2022-02-23 18:11:57,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108590896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:11:57,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:11:57,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:11:57,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061595220] [2022-02-23 18:11:57,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:11:57,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:11:57,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:57,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:11:57,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:11:57,830 INFO L87 Difference]: Start difference. First operand 179 states and 252 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:11:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:57,881 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2022-02-23 18:11:57,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:11:57,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2022-02-23 18:11:57,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:57,882 INFO L225 Difference]: With dead ends: 144 [2022-02-23 18:11:57,882 INFO L226 Difference]: Without dead ends: 144 [2022-02-23 18:11:57,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:11:57,883 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 18 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:57,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:11:57,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-23 18:11:57,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2022-02-23 18:11:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 38 states have call successors, (38), 10 states have call predecessors, (38), 9 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-02-23 18:11:57,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2022-02-23 18:11:57,888 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 47 [2022-02-23 18:11:57,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:57,888 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2022-02-23 18:11:57,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-02-23 18:11:57,888 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2022-02-23 18:11:57,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-23 18:11:57,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:57,889 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:57,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 18:11:58,103 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,SelfDestructingSolverStorable8 [2022-02-23 18:11:58,104 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-02-23 18:11:58,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:58,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863185078] [2022-02-23 18:11:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:58,111 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:58,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128692110] [2022-02-23 18:11:58,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:58,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:58,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:58,113 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) [2022-02-23 18:11:58,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 18:11:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:58,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:11:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 18:11:58,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:11:58,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:58,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863185078] [2022-02-23 18:11:58,239 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:58,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128692110] [2022-02-23 18:11:58,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128692110] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:11:58,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:11:58,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:11:58,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599323713] [2022-02-23 18:11:58,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:11:58,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:11:58,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:58,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:11:58,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:11:58,241 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-23 18:11:58,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:11:58,271 INFO L93 Difference]: Finished difference Result 165 states and 231 transitions. [2022-02-23 18:11:58,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:11:58,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-02-23 18:11:58,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:11:58,272 INFO L225 Difference]: With dead ends: 165 [2022-02-23 18:11:58,272 INFO L226 Difference]: Without dead ends: 165 [2022-02-23 18:11:58,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:11:58,273 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:11:58,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:11:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-23 18:11:58,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2022-02-23 18:11:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 80 states have (on average 1.1625) internal successors, (93), 88 states have internal predecessors, (93), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (55), 48 states have call predecessors, (55), 55 states have call successors, (55) [2022-02-23 18:11:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 205 transitions. [2022-02-23 18:11:58,285 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 205 transitions. Word has length 52 [2022-02-23 18:11:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:11:58,286 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 205 transitions. [2022-02-23 18:11:58,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-02-23 18:11:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 205 transitions. [2022-02-23 18:11:58,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-23 18:11:58,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:11:58,289 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:11:58,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-02-23 18:11:58,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 18:11:58,505 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:11:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:11:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-02-23 18:11:58,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:11:58,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673268454] [2022-02-23 18:11:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:58,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:11:58,520 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:11:58,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1352544713] [2022-02-23 18:11:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:11:58,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:11:58,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:11:58,536 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) [2022-02-23 18:11:58,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 18:11:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:11:58,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjunts are in the unsatisfiable core [2022-02-23 18:11:58,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:11:59,069 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-23 18:11:59,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:11:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-23 18:11:59,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:11:59,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673268454] [2022-02-23 18:11:59,510 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:11:59,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352544713] [2022-02-23 18:11:59,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352544713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:11:59,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:11:59,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2022-02-23 18:11:59,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725254155] [2022-02-23 18:11:59,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:11:59,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-23 18:11:59,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:11:59,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-23 18:11:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-02-23 18:11:59,512 INFO L87 Difference]: Start difference. First operand 148 states and 205 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 18:12:05,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:08,519 INFO L93 Difference]: Finished difference Result 292 states and 424 transitions. [2022-02-23 18:12:08,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-23 18:12:08,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 64 [2022-02-23 18:12:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:08,521 INFO L225 Difference]: With dead ends: 292 [2022-02-23 18:12:08,521 INFO L226 Difference]: Without dead ends: 290 [2022-02-23 18:12:08,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-02-23 18:12:08,522 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 136 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:08,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 424 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-23 18:12:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-23 18:12:08,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 243. [2022-02-23 18:12:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 143 states have (on average 1.1888111888111887) internal successors, (170), 151 states have internal predecessors, (170), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 18:12:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 338 transitions. [2022-02-23 18:12:08,531 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 338 transitions. Word has length 64 [2022-02-23 18:12:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:08,531 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 338 transitions. [2022-02-23 18:12:08,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 19 states have internal predecessors, (44), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-02-23 18:12:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 338 transitions. [2022-02-23 18:12:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-23 18:12:08,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:08,532 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:08,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:08,749 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,SelfDestructingSolverStorable10 [2022-02-23 18:12:08,749 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:08,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:08,750 INFO L85 PathProgramCache]: Analyzing trace with hash 696944608, now seen corresponding path program 1 times [2022-02-23 18:12:08,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:08,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668472802] [2022-02-23 18:12:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:08,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:08,772 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:08,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681994027] [2022-02-23 18:12:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:08,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:08,776 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) [2022-02-23 18:12:08,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 18:12:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:12:08,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-23 18:12:08,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-02-23 18:12:08,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-02-23 18:12:09,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:09,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668472802] [2022-02-23 18:12:09,103 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:09,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681994027] [2022-02-23 18:12:09,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681994027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:09,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:09,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-02-23 18:12:09,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781812604] [2022-02-23 18:12:09,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:09,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:12:09,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:12:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:12:09,104 INFO L87 Difference]: Start difference. First operand 243 states and 338 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-23 18:12:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:09,251 INFO L93 Difference]: Finished difference Result 345 states and 500 transitions. [2022-02-23 18:12:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:12:09,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 74 [2022-02-23 18:12:09,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:09,254 INFO L225 Difference]: With dead ends: 345 [2022-02-23 18:12:09,254 INFO L226 Difference]: Without dead ends: 345 [2022-02-23 18:12:09,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:12:09,254 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:09,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 244 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:12:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-23 18:12:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 247. [2022-02-23 18:12:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 154 states have internal predecessors, (173), 85 states have call successors, (85), 16 states have call predecessors, (85), 15 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 18:12:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 341 transitions. [2022-02-23 18:12:09,268 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 341 transitions. Word has length 74 [2022-02-23 18:12:09,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:09,268 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 341 transitions. [2022-02-23 18:12:09,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-02-23 18:12:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 341 transitions. [2022-02-23 18:12:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-23 18:12:09,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:09,269 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:09,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:09,483 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,SelfDestructingSolverStorable11 [2022-02-23 18:12:09,483 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:09,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:09,484 INFO L85 PathProgramCache]: Analyzing trace with hash -2010106522, now seen corresponding path program 1 times [2022-02-23 18:12:09,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:09,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751928287] [2022-02-23 18:12:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:09,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:09,490 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:09,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564374842] [2022-02-23 18:12:09,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:09,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:09,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:09,491 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) [2022-02-23 18:12:09,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-23 18:12:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:12:09,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-23 18:12:09,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-02-23 18:12:09,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-23 18:12:09,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:09,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751928287] [2022-02-23 18:12:09,944 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:09,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564374842] [2022-02-23 18:12:09,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564374842] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:09,944 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:09,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-02-23 18:12:09,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042913958] [2022-02-23 18:12:09,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:09,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 18:12:09,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 18:12:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:12:09,945 INFO L87 Difference]: Start difference. First operand 247 states and 341 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 18:12:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:10,296 INFO L93 Difference]: Finished difference Result 321 states and 451 transitions. [2022-02-23 18:12:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 18:12:10,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 72 [2022-02-23 18:12:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:10,311 INFO L225 Difference]: With dead ends: 321 [2022-02-23 18:12:10,311 INFO L226 Difference]: Without dead ends: 321 [2022-02-23 18:12:10,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-02-23 18:12:10,313 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 70 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:10,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 302 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:12:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-23 18:12:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 259. [2022-02-23 18:12:10,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 155 states have (on average 1.1741935483870967) internal successors, (182), 163 states have internal predecessors, (182), 85 states have call successors, (85), 19 states have call predecessors, (85), 18 states have return successors, (83), 76 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 18:12:10,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 350 transitions. [2022-02-23 18:12:10,329 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 350 transitions. Word has length 72 [2022-02-23 18:12:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:10,330 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 350 transitions. [2022-02-23 18:12:10,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 18:12:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 350 transitions. [2022-02-23 18:12:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-23 18:12:10,335 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:10,335 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:10,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:10,551 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,SelfDestructingSolverStorable12 [2022-02-23 18:12:10,551 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:10,552 INFO L85 PathProgramCache]: Analyzing trace with hash 857620825, now seen corresponding path program 2 times [2022-02-23 18:12:10,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:10,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305081374] [2022-02-23 18:12:10,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:10,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:10,558 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:10,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281505486] [2022-02-23 18:12:10,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:12:10,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:10,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:10,566 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) [2022-02-23 18:12:10,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-23 18:12:10,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:12:10,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:12:10,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-23 18:12:10,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 18:12:10,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:12:10,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:10,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305081374] [2022-02-23 18:12:10,704 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:10,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281505486] [2022-02-23 18:12:10,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281505486] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:12:10,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:12:10,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:12:10,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482705602] [2022-02-23 18:12:10,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:12:10,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:12:10,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:10,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:12:10,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:12:10,705 INFO L87 Difference]: Start difference. First operand 259 states and 350 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-23 18:12:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:10,745 INFO L93 Difference]: Finished difference Result 264 states and 348 transitions. [2022-02-23 18:12:10,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:12:10,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2022-02-23 18:12:10,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:10,748 INFO L225 Difference]: With dead ends: 264 [2022-02-23 18:12:10,748 INFO L226 Difference]: Without dead ends: 264 [2022-02-23 18:12:10,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-23 18:12:10,749 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:10,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:12:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-23 18:12:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 255. [2022-02-23 18:12:10,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 160 states have (on average 1.16875) internal successors, (187), 162 states have internal predecessors, (187), 77 states have call successors, (77), 18 states have call predecessors, (77), 17 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-23 18:12:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 339 transitions. [2022-02-23 18:12:10,759 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 339 transitions. Word has length 77 [2022-02-23 18:12:10,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:10,759 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 339 transitions. [2022-02-23 18:12:10,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-02-23 18:12:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 339 transitions. [2022-02-23 18:12:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-23 18:12:10,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:10,761 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:10,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:10,977 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,SelfDestructingSolverStorable13 [2022-02-23 18:12:10,977 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:10,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1988197843, now seen corresponding path program 3 times [2022-02-23 18:12:10,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:10,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271188796] [2022-02-23 18:12:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:10,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:10,987 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:10,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969573481] [2022-02-23 18:12:10,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:12:10,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:10,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:10,989 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) [2022-02-23 18:12:10,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-23 18:12:11,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 18:12:11,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:12:11,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 73 conjunts are in the unsatisfiable core [2022-02-23 18:12:11,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-02-23 18:12:11,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:12,788 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:12:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-23 18:12:19,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:19,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271188796] [2022-02-23 18:12:19,302 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:19,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969573481] [2022-02-23 18:12:19,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969573481] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:19,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:19,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-02-23 18:12:19,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048589189] [2022-02-23 18:12:19,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:19,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-23 18:12:19,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:19,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-23 18:12:19,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=748, Unknown=1, NotChecked=0, Total=870 [2022-02-23 18:12:19,304 INFO L87 Difference]: Start difference. First operand 255 states and 339 transitions. Second operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:12:32,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:12:32,833 INFO L93 Difference]: Finished difference Result 313 states and 414 transitions. [2022-02-23 18:12:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-23 18:12:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 77 [2022-02-23 18:12:32,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:12:32,835 INFO L225 Difference]: With dead ends: 313 [2022-02-23 18:12:32,835 INFO L226 Difference]: Without dead ends: 313 [2022-02-23 18:12:32,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 129 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=449, Invalid=2520, Unknown=1, NotChecked=0, Total=2970 [2022-02-23 18:12:32,837 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 112 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:12:32,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 494 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 450 Invalid, 0 Unknown, 95 Unchecked, 1.3s Time] [2022-02-23 18:12:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-23 18:12:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 299. [2022-02-23 18:12:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 192 states have (on average 1.15625) internal successors, (222), 194 states have internal predecessors, (222), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 82 states have call predecessors, (83), 83 states have call successors, (83) [2022-02-23 18:12:32,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 390 transitions. [2022-02-23 18:12:32,845 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 390 transitions. Word has length 77 [2022-02-23 18:12:32,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:12:32,845 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 390 transitions. [2022-02-23 18:12:32,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:12:32,845 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 390 transitions. [2022-02-23 18:12:32,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 18:12:32,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:12:32,846 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:12:32,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-23 18:12:33,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:33,067 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:12:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:12:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash -983010836, now seen corresponding path program 1 times [2022-02-23 18:12:33,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:12:33,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650714993] [2022-02-23 18:12:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:33,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:12:33,074 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:12:33,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799701245] [2022-02-23 18:12:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:12:33,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:12:33,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:12:33,076 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) [2022-02-23 18:12:33,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-23 18:12:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:12:33,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 89 conjunts are in the unsatisfiable core [2022-02-23 18:12:33,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:12:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 18:12:33,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:12:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-02-23 18:12:34,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:34,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650714993] [2022-02-23 18:12:34,936 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:34,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799701245] [2022-02-23 18:12:34,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799701245] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:34,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:34,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-02-23 18:12:34,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102318543] [2022-02-23 18:12:34,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:34,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 18:12:34,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 18:12:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:12:34,938 INFO L87 Difference]: Start difference. First operand 299 states and 390 transitions. Second operand has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 18:12:38,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:40,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:42,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:46,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:50,471 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:54,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:57,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:12:59,961 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:04,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:09,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:11,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:14,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:16,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:18,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:20,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:22,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:25,099 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:27,234 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:29,240 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 [] [2022-02-23 18:13:29,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:29,246 INFO L93 Difference]: Finished difference Result 498 states and 692 transitions. [2022-02-23 18:13:29,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-23 18:13:29,246 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 91 [2022-02-23 18:13:29,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:29,248 INFO L225 Difference]: With dead ends: 498 [2022-02-23 18:13:29,248 INFO L226 Difference]: Without dead ends: 496 [2022-02-23 18:13:29,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 165 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=856, Invalid=3700, Unknown=0, NotChecked=0, Total=4556 [2022-02-23 18:13:29,250 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 199 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 516 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:29,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 632 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 1550 Invalid, 13 Unknown, 0 Unchecked, 48.0s Time] [2022-02-23 18:13:29,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-23 18:13:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 436. [2022-02-23 18:13:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 259 states have (on average 1.193050193050193) internal successors, (309), 261 states have internal predecessors, (309), 149 states have call successors, (149), 28 states have call predecessors, (149), 27 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2022-02-23 18:13:29,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 605 transitions. [2022-02-23 18:13:29,260 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 605 transitions. Word has length 91 [2022-02-23 18:13:29,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:29,260 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 605 transitions. [2022-02-23 18:13:29,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.590909090909091) internal successors, (57), 23 states have internal predecessors, (57), 10 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-02-23 18:13:29,261 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 605 transitions. [2022-02-23 18:13:29,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 18:13:29,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:29,262 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:29,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:29,471 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,SelfDestructingSolverStorable15 [2022-02-23 18:13:29,471 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:29,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:29,472 INFO L85 PathProgramCache]: Analyzing trace with hash 736682115, now seen corresponding path program 1 times [2022-02-23 18:13:29,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:29,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531264771] [2022-02-23 18:13:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:29,478 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:29,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326279201] [2022-02-23 18:13:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:29,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:29,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:29,486 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) [2022-02-23 18:13:29,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-23 18:13:29,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:29,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 18:13:29,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-02-23 18:13:29,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-02-23 18:13:30,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:30,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531264771] [2022-02-23 18:13:30,604 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:30,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326279201] [2022-02-23 18:13:30,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326279201] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:30,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:30,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-02-23 18:13:30,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024678138] [2022-02-23 18:13:30,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:30,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:13:30,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:13:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:13:30,605 INFO L87 Difference]: Start difference. First operand 436 states and 605 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-23 18:13:31,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:13:31,823 INFO L93 Difference]: Finished difference Result 984 states and 1501 transitions. [2022-02-23 18:13:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 18:13:31,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 94 [2022-02-23 18:13:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:13:31,828 INFO L225 Difference]: With dead ends: 984 [2022-02-23 18:13:31,828 INFO L226 Difference]: Without dead ends: 984 [2022-02-23 18:13:31,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-02-23 18:13:31,829 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 96 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-23 18:13:31,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 479 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-23 18:13:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-02-23 18:13:31,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 894. [2022-02-23 18:13:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 448 states have (on average 1.2901785714285714) internal successors, (578), 450 states have internal predecessors, (578), 413 states have call successors, (413), 33 states have call predecessors, (413), 32 states have return successors, (411), 410 states have call predecessors, (411), 411 states have call successors, (411) [2022-02-23 18:13:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1402 transitions. [2022-02-23 18:13:31,875 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1402 transitions. Word has length 94 [2022-02-23 18:13:31,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:13:31,875 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 1402 transitions. [2022-02-23 18:13:31,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 7 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-02-23 18:13:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1402 transitions. [2022-02-23 18:13:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-23 18:13:31,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:13:31,876 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:13:31,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-23 18:13:32,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-23 18:13:32,091 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:13:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:13:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1867259133, now seen corresponding path program 1 times [2022-02-23 18:13:32,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:13:32,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490126605] [2022-02-23 18:13:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:32,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:13:32,099 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:13:32,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495804905] [2022-02-23 18:13:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:13:32,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:13:32,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:13:32,108 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:13:32,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-23 18:13:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:13:32,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 41 conjunts are in the unsatisfiable core [2022-02-23 18:13:32,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:13:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-02-23 18:13:32,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:13:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-02-23 18:13:33,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:13:33,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490126605] [2022-02-23 18:13:33,617 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:13:33,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495804905] [2022-02-23 18:13:33,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495804905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:13:33,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:13:33,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-02-23 18:13:33,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268407240] [2022-02-23 18:13:33,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:13:33,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-23 18:13:33,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:13:33,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-23 18:13:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-02-23 18:13:33,619 INFO L87 Difference]: Start difference. First operand 894 states and 1402 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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) [2022-02-23 18:13:41,725 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 [] [2022-02-23 18:14:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:14:03,002 INFO L93 Difference]: Finished difference Result 1374 states and 2188 transitions. [2022-02-23 18:14:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-23 18:14:03,002 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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 94 [2022-02-23 18:14:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:14:03,009 INFO L225 Difference]: With dead ends: 1374 [2022-02-23 18:14:03,009 INFO L226 Difference]: Without dead ends: 1374 [2022-02-23 18:14:03,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=676, Invalid=2404, Unknown=0, NotChecked=0, Total=3080 [2022-02-23 18:14:03,010 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 142 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 401 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:14:03,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 718 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 928 Invalid, 1 Unknown, 0 Unchecked, 15.1s Time] [2022-02-23 18:14:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-02-23 18:14:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1205. [2022-02-23 18:14:03,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 594 states have (on average 1.3047138047138047) internal successors, (775), 596 states have internal predecessors, (775), 573 states have call successors, (573), 38 states have call predecessors, (573), 37 states have return successors, (571), 570 states have call predecessors, (571), 571 states have call successors, (571) [2022-02-23 18:14:03,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1919 transitions. [2022-02-23 18:14:03,048 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1919 transitions. Word has length 94 [2022-02-23 18:14:03,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:14:03,049 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 1919 transitions. [2022-02-23 18:14:03,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 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) [2022-02-23 18:14:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1919 transitions. [2022-02-23 18:14:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-23 18:14:03,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:14:03,051 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2022-02-23 18:14:03,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-23 18:14:03,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-02-23 18:14:03,282 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:14:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:14:03,282 INFO L85 PathProgramCache]: Analyzing trace with hash -464781530, now seen corresponding path program 2 times [2022-02-23 18:14:03,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:14:03,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627226772] [2022-02-23 18:14:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:14:03,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:14:03,293 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:14:03,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512354296] [2022-02-23 18:14:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:14:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:14:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:14:03,294 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:14:03,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-23 18:14:03,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:14:03,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:14:03,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 18:14:03,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:14:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-02-23 18:14:03,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:14:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-02-23 18:14:03,657 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:14:03,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627226772] [2022-02-23 18:14:03,657 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:14:03,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512354296] [2022-02-23 18:14:03,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512354296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:14:03,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:14:03,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-02-23 18:14:03,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198813857] [2022-02-23 18:14:03,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:14:03,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 18:14:03,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:14:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 18:14:03,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:14:03,658 INFO L87 Difference]: Start difference. First operand 1205 states and 1919 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 18:14:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:14:04,166 INFO L93 Difference]: Finished difference Result 1386 states and 2204 transitions. [2022-02-23 18:14:04,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-23 18:14:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 99 [2022-02-23 18:14:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:14:04,177 INFO L225 Difference]: With dead ends: 1386 [2022-02-23 18:14:04,178 INFO L226 Difference]: Without dead ends: 1386 [2022-02-23 18:14:04,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-02-23 18:14:04,178 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 65 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:14:04,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 495 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:14:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2022-02-23 18:14:04,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1174. [2022-02-23 18:14:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 571 states have (on average 1.3099824868651488) internal successors, (748), 573 states have internal predecessors, (748), 565 states have call successors, (565), 38 states have call predecessors, (565), 37 states have return successors, (563), 562 states have call predecessors, (563), 563 states have call successors, (563) [2022-02-23 18:14:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1876 transitions. [2022-02-23 18:14:04,208 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1876 transitions. Word has length 99 [2022-02-23 18:14:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:14:04,209 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1876 transitions. [2022-02-23 18:14:04,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-02-23 18:14:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1876 transitions. [2022-02-23 18:14:04,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-23 18:14:04,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:14:04,210 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:14:04,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-23 18:14:04,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:14:04,429 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:14:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:14:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1063397065, now seen corresponding path program 4 times [2022-02-23 18:14:04,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:14:04,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052223917] [2022-02-23 18:14:04,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:14:04,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:14:04,436 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:14:04,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968243483] [2022-02-23 18:14:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:14:04,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:14:04,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:14:04,444 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:14:04,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-23 18:14:04,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:14:04,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:14:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 85 conjunts are in the unsatisfiable core [2022-02-23 18:14:04,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:14:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 56 proven. 62 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-02-23 18:14:05,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:14:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-02-23 18:14:05,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:14:05,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052223917] [2022-02-23 18:14:05,835 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:14:05,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968243483] [2022-02-23 18:14:05,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968243483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:14:05,835 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:14:05,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-02-23 18:14:05,835 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891905918] [2022-02-23 18:14:05,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:14:05,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-23 18:14:05,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:14:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-23 18:14:05,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-23 18:14:05,836 INFO L87 Difference]: Start difference. First operand 1174 states and 1876 transitions. Second operand has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-23 18:14:09,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:12,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:14:16,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:14:16,865 INFO L93 Difference]: Finished difference Result 1358 states and 2158 transitions. [2022-02-23 18:14:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-23 18:14:16,866 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) Word has length 102 [2022-02-23 18:14:16,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:14:16,873 INFO L225 Difference]: With dead ends: 1358 [2022-02-23 18:14:16,873 INFO L226 Difference]: Without dead ends: 1358 [2022-02-23 18:14:16,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=386, Invalid=1870, Unknown=0, NotChecked=0, Total=2256 [2022-02-23 18:14:16,874 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 110 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 201 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:14:16,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 697 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 947 Invalid, 2 Unknown, 0 Unchecked, 10.1s Time] [2022-02-23 18:14:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-02-23 18:14:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1331. [2022-02-23 18:14:16,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 647 states have (on average 1.3106646058732612) internal successors, (848), 649 states have internal predecessors, (848), 641 states have call successors, (641), 43 states have call predecessors, (641), 42 states have return successors, (639), 638 states have call predecessors, (639), 639 states have call successors, (639) [2022-02-23 18:14:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2128 transitions. [2022-02-23 18:14:16,919 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2128 transitions. Word has length 102 [2022-02-23 18:14:16,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:14:16,920 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 2128 transitions. [2022-02-23 18:14:16,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (23), 7 states have call predecessors, (23), 9 states have call successors, (23) [2022-02-23 18:14:16,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2128 transitions. [2022-02-23 18:14:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-23 18:14:16,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:14:16,923 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:14:16,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-23 18:14:17,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:14:17,139 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:14:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:14:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash -529470484, now seen corresponding path program 2 times [2022-02-23 18:14:17,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:14:17,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791559718] [2022-02-23 18:14:17,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:14:17,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:14:17,146 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:14:17,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924087895] [2022-02-23 18:14:17,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:14:17,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:14:17,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:14:17,149 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:14:17,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-23 18:14:17,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:14:17,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:14:17,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 104 conjunts are in the unsatisfiable core [2022-02-23 18:14:17,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:14:18,731 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:14:18,736 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:14:28,307 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse12 (* c_main_~p~0 c_main_~x~0)) (.cse13 (* c_main_~r~0 c_main_~y~0))) (and (let ((.cse0 (= (+ .cse12 .cse13 c_main_~y~0) c_main_~x~0)) (.cse7 (= (mod (+ c_main_~s~0 c_main_~r~0 1) 2) 0)) (.cse8 (= c_main_~r~0 0)) (.cse5 (* c_main_~r~0 c_main_~y~0 0)) (.cse6 (* c_main_~p~0 c_main_~x~0 0)) (.cse9 (div (+ (* (- 1) c_main_~s~0) c_main_~r~0 1) 2))) (or (and .cse0 (let ((.cse2 (= c_main_~p~0 0)) (.cse3 (= (mod (+ c_main_~q~0 c_main_~p~0) 2) 0)) (.cse1 (div (+ c_main_~q~0 (* (- 1) c_main_~p~0)) (- 2)))) (or (and (= .cse1 0) .cse2 (exists ((aux_div_main_~k~0_23 Int)) (= (+ (* 2 (* c_main_~p~0 aux_div_main_~k~0_23 c_main_~x~0)) (* (* c_main_~r~0 aux_div_main_~k~0_23 c_main_~y~0) 2) (* c_main_~r~0 c_main_~y~0 0) (* c_main_~p~0 c_main_~x~0 0)) c_main_~x~0)) .cse3) (and (= (mod .cse1 c_main_~p~0) 0) (not .cse2) .cse3 (= (let ((.cse4 (div .cse1 c_main_~p~0))) (+ (* (* .cse4 c_main_~r~0 c_main_~y~0) 2) .cse5 .cse6 (* (* .cse4 c_main_~p~0 c_main_~x~0) 2))) c_main_~x~0)))) .cse7 .cse8 (= .cse9 0)) (let ((.cse11 (div .cse9 c_main_~r~0))) (let ((.cse10 (+ (* 2 (* c_main_~r~0 c_main_~y~0 .cse11)) (* (* c_main_~p~0 c_main_~x~0 .cse11) 2) .cse5 .cse6))) (and .cse0 .cse7 (= (mod .cse9 c_main_~r~0) 0) (not .cse8) (= .cse10 c_main_~x~0) (= (+ c_main_~q~0 (* 2 (* c_main_~p~0 .cse11))) c_main_~p~0) (= .cse10 (+ (* .cse12 4) (* .cse13 4)))))))) (= (+ .cse12 .cse13) c_main_~a~0))) is different from false [2022-02-23 18:16:40,072 WARN L232 SmtUtils]: Spent 13.62s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:18:05,514 WARN L232 SmtUtils]: Spent 13.66s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:18:35,740 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~y~0_BEFORE_CALL_110 Int) (v_main_~p~0_BEFORE_CALL_79 Int) (v_main_~x~0_BEFORE_CALL_119 Int) (v_main_~s~0_BEFORE_CALL_91 Int) (aux_div_v_main_~r~0_BEFORE_CALL_87_67 Int)) (let ((.cse11 (* aux_div_v_main_~r~0_BEFORE_CALL_87_67 2))) (let ((.cse0 (div (+ (* (- 2) v_main_~s~0_BEFORE_CALL_91) .cse11) 2)) (.cse1 (+ (- 1) (* (- 1) v_main_~s~0_BEFORE_CALL_91) .cse11))) (let ((.cse10 (div .cse0 .cse1))) (let ((.cse3 (* v_main_~y~0_BEFORE_CALL_110 v_main_~s~0_BEFORE_CALL_91)) (.cse8 (* 2 (* v_main_~y~0_BEFORE_CALL_110 .cse10 0))) (.cse4 (* 2 (* v_main_~p~0_BEFORE_CALL_79 v_main_~x~0_BEFORE_CALL_119 .cse10))) (.cse9 (* (* aux_div_v_main_~r~0_BEFORE_CALL_87_67 v_main_~y~0_BEFORE_CALL_110 .cse10) 4)) (.cse6 (* (* v_main_~y~0_BEFORE_CALL_110 .cse10 v_main_~s~0_BEFORE_CALL_91) 2)) (.cse2 (* v_main_~p~0_BEFORE_CALL_79 v_main_~x~0_BEFORE_CALL_119)) (.cse5 (* aux_div_v_main_~r~0_BEFORE_CALL_87_67 v_main_~y~0_BEFORE_CALL_110)) (.cse7 (* (* v_main_~y~0_BEFORE_CALL_110 .cse10) 2))) (and (= (mod .cse0 .cse1) 0) (not (= (+ .cse2 .cse3) .cse4)) (= (+ v_main_~x~0_BEFORE_CALL_119 .cse3) (+ .cse2 (* 2 .cse5))) (= (+ .cse6 v_main_~x~0_BEFORE_CALL_119 .cse7) (+ .cse8 .cse4 .cse9)) (= (+ (* .cse3 4) .cse8 (* v_main_~y~0_BEFORE_CALL_110 4) .cse4 .cse9) (+ .cse6 (* .cse2 4) (* .cse5 8) .cse7)))))))) is different from false [2022-02-23 18:18:37,745 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~y~0_BEFORE_CALL_110 Int) (v_main_~p~0_BEFORE_CALL_79 Int) (v_main_~x~0_BEFORE_CALL_119 Int) (v_main_~s~0_BEFORE_CALL_91 Int) (aux_div_v_main_~r~0_BEFORE_CALL_87_67 Int)) (let ((.cse11 (* aux_div_v_main_~r~0_BEFORE_CALL_87_67 2))) (let ((.cse0 (div (+ (* (- 2) v_main_~s~0_BEFORE_CALL_91) .cse11) 2)) (.cse1 (+ (- 1) (* (- 1) v_main_~s~0_BEFORE_CALL_91) .cse11))) (let ((.cse10 (div .cse0 .cse1))) (let ((.cse3 (* v_main_~y~0_BEFORE_CALL_110 v_main_~s~0_BEFORE_CALL_91)) (.cse8 (* 2 (* v_main_~y~0_BEFORE_CALL_110 .cse10 0))) (.cse4 (* 2 (* v_main_~p~0_BEFORE_CALL_79 v_main_~x~0_BEFORE_CALL_119 .cse10))) (.cse9 (* (* aux_div_v_main_~r~0_BEFORE_CALL_87_67 v_main_~y~0_BEFORE_CALL_110 .cse10) 4)) (.cse6 (* (* v_main_~y~0_BEFORE_CALL_110 .cse10 v_main_~s~0_BEFORE_CALL_91) 2)) (.cse2 (* v_main_~p~0_BEFORE_CALL_79 v_main_~x~0_BEFORE_CALL_119)) (.cse5 (* aux_div_v_main_~r~0_BEFORE_CALL_87_67 v_main_~y~0_BEFORE_CALL_110)) (.cse7 (* (* v_main_~y~0_BEFORE_CALL_110 .cse10) 2))) (and (= (mod .cse0 .cse1) 0) (not (= (+ .cse2 .cse3) .cse4)) (= (+ v_main_~x~0_BEFORE_CALL_119 .cse3) (+ .cse2 (* 2 .cse5))) (= (+ .cse6 v_main_~x~0_BEFORE_CALL_119 .cse7) (+ .cse8 .cse4 .cse9)) (= (+ (* .cse3 4) .cse8 (* v_main_~y~0_BEFORE_CALL_110 4) .cse4 .cse9) (+ .cse6 (* .cse2 4) (* .cse5 8) .cse7)))))))) is different from true [2022-02-23 18:18:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 192 proven. 71 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2022-02-23 18:18:37,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:19:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 199 proven. 4 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2022-02-23 18:19:27,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:19:27,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791559718] [2022-02-23 18:19:27,088 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:19:27,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924087895] [2022-02-23 18:19:27,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924087895] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:19:27,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:19:27,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 33 [2022-02-23 18:19:27,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321332005] [2022-02-23 18:19:27,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:19:27,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-23 18:19:27,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:19:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-23 18:19:27,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=808, Unknown=14, NotChecked=118, Total=1056 [2022-02-23 18:19:27,090 INFO L87 Difference]: Start difference. First operand 1331 states and 2128 transitions. Second operand has 33 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 10 states have call successors, (29) [2022-02-23 18:19:37,083 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 [] [2022-02-23 18:20:24,501 WARN L232 SmtUtils]: Spent 25.21s on a formula simplification that was a NOOP. DAG size: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:20:37,479 WARN L232 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 84 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:20:42,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:48,498 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:52,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:20:55,942 INFO L93 Difference]: Finished difference Result 1384 states and 2178 transitions. [2022-02-23 18:20:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-23 18:20:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 10 states have call successors, (29) Word has length 141 [2022-02-23 18:20:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:20:55,947 INFO L225 Difference]: With dead ends: 1384 [2022-02-23 18:20:55,947 INFO L226 Difference]: Without dead ends: 1378 [2022-02-23 18:20:55,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 176.7s TimeCoverageRelationStatistics Valid=811, Invalid=4879, Unknown=18, NotChecked=298, Total=6006 [2022-02-23 18:20:55,949 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 103 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 286 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:20:55,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 785 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 941 Invalid, 1 Unknown, 615 Unchecked, 23.3s Time] [2022-02-23 18:20:55,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-02-23 18:20:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1120. [2022-02-23 18:20:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 554 states have (on average 1.2851985559566788) internal successors, (712), 555 states have internal predecessors, (712), 520 states have call successors, (520), 46 states have call predecessors, (520), 45 states have return successors, (519), 518 states have call predecessors, (519), 519 states have call successors, (519) [2022-02-23 18:20:55,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1751 transitions. [2022-02-23 18:20:55,979 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1751 transitions. Word has length 141 [2022-02-23 18:20:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:20:55,979 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1751 transitions. [2022-02-23 18:20:55,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 12 states have call predecessors, (29), 10 states have call successors, (29) [2022-02-23 18:20:55,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1751 transitions. [2022-02-23 18:20:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-23 18:20:55,983 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:20:55,983 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:20:56,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-23 18:20:56,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-02-23 18:20:56,200 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:20:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:20:56,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1625362831, now seen corresponding path program 2 times [2022-02-23 18:20:56,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:20:56,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910831539] [2022-02-23 18:20:56,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:20:56,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:20:56,209 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:20:56,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543200169] [2022-02-23 18:20:56,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:20:56,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:20:56,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:20:56,223 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:20:56,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-23 18:20:56,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:20:56,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:20:56,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-23 18:20:56,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:20:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 266 proven. 99 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2022-02-23 18:20:56,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:20:57,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:20:57,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910831539] [2022-02-23 18:20:57,278 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:20:57,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543200169] [2022-02-23 18:20:57,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543200169] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:20:57,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:20:57,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-02-23 18:20:57,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604094531] [2022-02-23 18:20:57,279 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:20:57,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 18:20:57,279 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:20:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 18:20:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:20:57,280 INFO L87 Difference]: Start difference. First operand 1120 states and 1751 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-23 18:20:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:20:57,720 INFO L93 Difference]: Finished difference Result 1136 states and 1772 transitions. [2022-02-23 18:20:57,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-23 18:20:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 182 [2022-02-23 18:20:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:20:57,727 INFO L225 Difference]: With dead ends: 1136 [2022-02-23 18:20:57,727 INFO L226 Difference]: Without dead ends: 1136 [2022-02-23 18:20:57,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2022-02-23 18:20:57,728 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 64 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:20:57,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 660 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:20:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-02-23 18:20:57,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1126. [2022-02-23 18:20:57,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 556 states have (on average 1.2859712230215827) internal successors, (715), 557 states have internal predecessors, (715), 524 states have call successors, (524), 46 states have call predecessors, (524), 45 states have return successors, (523), 522 states have call predecessors, (523), 523 states have call successors, (523) [2022-02-23 18:20:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1762 transitions. [2022-02-23 18:20:57,756 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1762 transitions. Word has length 182 [2022-02-23 18:20:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:20:57,757 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1762 transitions. [2022-02-23 18:20:57,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-23 18:20:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1762 transitions. [2022-02-23 18:20:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-23 18:20:57,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:20:57,761 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:20:57,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-23 18:20:57,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-02-23 18:20:57,991 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:20:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:20:57,992 INFO L85 PathProgramCache]: Analyzing trace with hash 540961160, now seen corresponding path program 2 times [2022-02-23 18:20:57,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:20:57,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64677570] [2022-02-23 18:20:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:20:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:20:57,998 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:20:57,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490559262] [2022-02-23 18:20:57,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:20:57,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:20:57,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:20:57,999 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:20:58,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-23 18:20:58,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:20:58,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:20:58,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 18:20:58,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:20:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 269 proven. 102 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2022-02-23 18:20:58,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:20:59,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:20:59,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64677570] [2022-02-23 18:20:59,305 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:20:59,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490559262] [2022-02-23 18:20:59,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490559262] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:20:59,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:20:59,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-02-23 18:20:59,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112758092] [2022-02-23 18:20:59,305 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:20:59,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:20:59,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:20:59,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:20:59,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-02-23 18:20:59,306 INFO L87 Difference]: Start difference. First operand 1126 states and 1762 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-23 18:20:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:20:59,898 INFO L93 Difference]: Finished difference Result 1232 states and 1908 transitions. [2022-02-23 18:20:59,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-23 18:20:59,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 187 [2022-02-23 18:20:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:20:59,903 INFO L225 Difference]: With dead ends: 1232 [2022-02-23 18:20:59,903 INFO L226 Difference]: Without dead ends: 1232 [2022-02-23 18:20:59,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2022-02-23 18:20:59,903 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 54 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:20:59,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 786 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 18:20:59,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-02-23 18:20:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1174. [2022-02-23 18:20:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 572 states have (on average 1.2919580419580419) internal successors, (739), 573 states have internal predecessors, (739), 556 states have call successors, (556), 46 states have call predecessors, (556), 45 states have return successors, (555), 554 states have call predecessors, (555), 555 states have call successors, (555) [2022-02-23 18:20:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1850 transitions. [2022-02-23 18:20:59,927 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1850 transitions. Word has length 187 [2022-02-23 18:20:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:20:59,927 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1850 transitions. [2022-02-23 18:20:59,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 9 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-23 18:20:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1850 transitions. [2022-02-23 18:20:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-23 18:20:59,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:20:59,931 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:20:59,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-23 18:21:00,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:21:00,139 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:21:00,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:21:00,140 INFO L85 PathProgramCache]: Analyzing trace with hash -992821454, now seen corresponding path program 3 times [2022-02-23 18:21:00,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:21:00,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859242583] [2022-02-23 18:21:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:21:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:21:00,151 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:21:00,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509652919] [2022-02-23 18:21:00,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:21:00,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:21:00,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:21:00,153 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-23 18:21:00,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-23 18:21:00,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 18:21:00,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:21:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 18:21:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:21:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 176 proven. 37 refuted. 0 times theorem prover too weak. 1767 trivial. 0 not checked. [2022-02-23 18:21:00,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:21:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 140 proven. 13 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2022-02-23 18:21:00,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:21:00,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859242583] [2022-02-23 18:21:00,890 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:21:00,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509652919] [2022-02-23 18:21:00,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509652919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:21:00,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:21:00,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-02-23 18:21:00,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320129861] [2022-02-23 18:21:00,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:21:00,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 18:21:00,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:21:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 18:21:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:21:00,891 INFO L87 Difference]: Start difference. First operand 1174 states and 1850 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-02-23 18:21:01,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:21:01,194 INFO L93 Difference]: Finished difference Result 1587 states and 2551 transitions. [2022-02-23 18:21:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:21:01,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) Word has length 204 [2022-02-23 18:21:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:21:01,194 INFO L225 Difference]: With dead ends: 1587 [2022-02-23 18:21:01,195 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 18:21:01,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 394 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-02-23 18:21:01,198 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 18:21:01,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 225 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 18:21:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 18:21:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 18:21:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 18:21:01,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 18:21:01,199 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 204 [2022-02-23 18:21:01,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:21:01,199 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 18:21:01,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 5 states have call successors, (20) [2022-02-23 18:21:01,199 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 18:21:01,199 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 18:21:01,201 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 18:21:01,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-23 18:21:01,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:21:01,405 INFO L732 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:21:01,406 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 18:21:01,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:21:01 BasicIcfg [2022-02-23 18:21:01,407 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 18:21:01,408 INFO L158 Benchmark]: Toolchain (without parser) took 552390.36ms. Allocated memory was 196.1MB in the beginning and 307.2MB in the end (delta: 111.1MB). Free memory was 145.1MB in the beginning and 220.4MB in the end (delta: -75.3MB). Peak memory consumption was 37.0MB. Max. memory is 8.0GB. [2022-02-23 18:21:01,408 INFO L158 Benchmark]: CDTParser took 0.74ms. Allocated memory is still 196.1MB. Free memory was 161.3MB in the beginning and 161.1MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 18:21:01,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.29ms. Allocated memory was 196.1MB in the beginning and 255.9MB in the end (delta: 59.8MB). Free memory was 144.9MB in the beginning and 231.1MB in the end (delta: -86.3MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. [2022-02-23 18:21:01,408 INFO L158 Benchmark]: Boogie Preprocessor took 24.27ms. Allocated memory is still 255.9MB. Free memory was 231.1MB in the beginning and 229.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 18:21:01,408 INFO L158 Benchmark]: RCFGBuilder took 218.98ms. Allocated memory is still 255.9MB. Free memory was 229.6MB in the beginning and 217.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 18:21:01,409 INFO L158 Benchmark]: IcfgTransformer took 30.31ms. Allocated memory is still 255.9MB. Free memory was 217.5MB in the beginning and 215.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 18:21:01,409 INFO L158 Benchmark]: TraceAbstraction took 551874.45ms. Allocated memory was 255.9MB in the beginning and 307.2MB in the end (delta: 51.4MB). Free memory was 215.4MB in the beginning and 220.4MB in the end (delta: -5.0MB). Peak memory consumption was 46.2MB. Max. memory is 8.0GB. [2022-02-23 18:21:01,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.74ms. Allocated memory is still 196.1MB. Free memory was 161.3MB in the beginning and 161.1MB in the end (delta: 132.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.29ms. Allocated memory was 196.1MB in the beginning and 255.9MB in the end (delta: 59.8MB). Free memory was 144.9MB in the beginning and 231.1MB in the end (delta: -86.3MB). Peak memory consumption was 11.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.27ms. Allocated memory is still 255.9MB. Free memory was 231.1MB in the beginning and 229.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 218.98ms. Allocated memory is still 255.9MB. Free memory was 229.6MB in the beginning and 217.5MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 30.31ms. Allocated memory is still 255.9MB. Free memory was 217.5MB in the beginning and 215.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 551874.45ms. Allocated memory was 255.9MB in the beginning and 307.2MB in the end (delta: 51.4MB). Free memory was 215.4MB in the beginning and 220.4MB in the end (delta: -5.0MB). Peak memory consumption was 46.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 551.8s, OverallIterations: 24, TraceHistogramMax: 31, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 213.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 17 mSolverCounterUnknown, 1668 SdHoareTripleChecker+Valid, 108.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1588 mSDsluCounter, 9133 SdHoareTripleChecker+Invalid, 107.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 710 IncrementalHoareTripleChecker+Unchecked, 7826 mSDsCounter, 2703 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9560 IncrementalHoareTripleChecker+Invalid, 12990 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2703 mSolverCounterUnsat, 1307 mSDtfsCounter, 9560 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3917 GetRequests, 3271 SyntacticMatches, 25 SemanticMatches, 621 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 6078 ImplicationChecksByTransitivity, 225.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1331occurred in iteration=20, InterpolantAutomatonStates: 451, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 24 MinimizatonAttempts, 1218 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 331.2s InterpolantComputationTime, 1978 NumberOfCodeBlocks, 1813 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 3257 ConstructedInterpolants, 11 QuantifiedInterpolants, 19559 SizeOfPredicates, 171 NumberOfNonLiveVariables, 4681 ConjunctsInSsa, 752 ConjunctsInUnsatCore, 40 InterpolantComputations, 8 PerfectInterpolantSequences, 10738/11483 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 18:21:01,510 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...