/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/egcd2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:09:12,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:09:12,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:09:12,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:09:12,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:09:12,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:09:12,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:09:12,179 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:09:12,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:09:12,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:09:12,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:09:12,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:09:12,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:09:12,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:09:12,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:09:12,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:09:12,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:09:12,186 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:09:12,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:09:12,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:09:12,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:09:12,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:09:12,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:09:12,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:09:12,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:09:12,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 18:09:12,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 18:09:12,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 18:09:12,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 18:09:12,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 18:09:12,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 18:09:12,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 18:09:12,197 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 18:09:12,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:09:12,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:09:12,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:09:12,199 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:09:12,205 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:09:12,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:09:12,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:09:12,206 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:09:12,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:09:12,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:09:12,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:09:12,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:09:12,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:09:12,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:09:12,207 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:09:12,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:09:12,207 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:09:12,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:09:12,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:09:12,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:09:12,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:09:12,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:09:12,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:09:12,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:09:12,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:09:12,208 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:09:12,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:09:12,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:09:12,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:09:12,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:09:12,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:09:12,457 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:09:12,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-02-23 18:09:12,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99316d717/03b02b54fe6447caaf545bb53043a97f/FLAG27d71715d [2022-02-23 18:09:12,866 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:09:12,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-02-23 18:09:12,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99316d717/03b02b54fe6447caaf545bb53043a97f/FLAG27d71715d [2022-02-23 18:09:12,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99316d717/03b02b54fe6447caaf545bb53043a97f [2022-02-23 18:09:12,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:09:12,884 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:09:12,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:09:12,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:09:12,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:09:12,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:09:12" (1/1) ... [2022-02-23 18:09:12,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516dc5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:12, skipping insertion in model container [2022-02-23 18:09:12,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:09:12" (1/1) ... [2022-02-23 18:09:12,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:09:12,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:09:13,086 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/egcd2-ll_valuebound5.c[490,503] [2022-02-23 18:09:13,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:09:13,121 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:09:13,132 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/egcd2-ll_valuebound5.c[490,503] [2022-02-23 18:09:13,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:09:13,163 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:09:13,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13 WrapperNode [2022-02-23 18:09:13,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:09:13,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:09:13,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:09:13,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:09:13,175 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:09:13,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:09:13,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:09:13,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:09:13,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:09:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:13,236 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 18:09:13,242 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 18:09:13,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:09:13,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:09:13,273 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:09:13,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:09:13,274 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:09:13,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:09:13,274 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:09:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:09:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:09:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:09:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:09:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:09:13,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:09:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:09:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:09:13,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:09:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:09:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:09:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:09:13,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:09:13,328 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:09:13,330 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:09:13,459 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:09:13,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:09:13,463 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 18:09:13,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:13 BoogieIcfgContainer [2022-02-23 18:09:13,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:09:13,465 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:09:13,465 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:09:13,487 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:09:13,490 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:13" (1/1) ... [2022-02-23 18:09:13,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:09:13 BasicIcfg [2022-02-23 18:09:13,502 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:09:13,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:09:13,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:09:13,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:09:13,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:09:12" (1/4) ... [2022-02-23 18:09:13,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588c3017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:09:13, skipping insertion in model container [2022-02-23 18:09:13,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:09:13" (2/4) ... [2022-02-23 18:09:13,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588c3017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:09:13, skipping insertion in model container [2022-02-23 18:09:13,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:09:13" (3/4) ... [2022-02-23 18:09:13,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588c3017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:09:13, skipping insertion in model container [2022-02-23 18:09:13,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:09:13" (4/4) ... [2022-02-23 18:09:13,508 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.cJordan [2022-02-23 18:09:13,511 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:09:13,511 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:09:13,548 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:09:13,553 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 18:09:13,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:09:13,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-02-23 18:09:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 18:09:13,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:13,575 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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 18:09:13,576 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:13,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:13,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-02-23 18:09:13,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:13,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949106764] [2022-02-23 18:09:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:13,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:09:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:13,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:09:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:13,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 18:09:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:13,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 18:09:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:13,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 18:09:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:13,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-23 18:09:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:13,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-23 18:09:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 18:09:13,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:13,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949106764] [2022-02-23 18:09:13,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949106764] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:13,822 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:13,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:09:13,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722283972] [2022-02-23 18:09:13,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:13,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:09:13,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:13,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:09:13,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:09:13,853 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:09:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:13,940 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-02-23 18:09:13,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:09:13,942 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-02-23 18:09:13,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:13,947 INFO L225 Difference]: With dead ends: 40 [2022-02-23 18:09:13,947 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 18:09:13,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 18:09:13,951 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:13,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 18:09:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 18:09:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:09:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-23 18:09:13,981 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-02-23 18:09:13,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:13,983 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-23 18:09:13,983 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:09:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-23 18:09:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 18:09:13,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:13,985 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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 18:09:13,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:09:13,986 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-02-23 18:09:13,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:13,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105191117] [2022-02-23 18:09:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:13,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:14,025 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:14,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646442747] [2022-02-23 18:09:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:14,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:14,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:14,032 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 18:09:14,033 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 18:09:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:14,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:09:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:09:14,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:09:14,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:14,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105191117] [2022-02-23 18:09:14,392 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:14,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646442747] [2022-02-23 18:09:14,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646442747] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:14,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:14,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-02-23 18:09:14,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003853962] [2022-02-23 18:09:14,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:14,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 18:09:14,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 18:09:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:09:14,402 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:09:14,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:14,469 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-02-23 18:09:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:09:14,470 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-02-23 18:09:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:14,471 INFO L225 Difference]: With dead ends: 44 [2022-02-23 18:09:14,471 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 18:09:14,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:09:14,472 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:14,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:14,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 18:09:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-23 18:09:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:09:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-02-23 18:09:14,478 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-02-23 18:09:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:14,479 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-02-23 18:09:14,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-02-23 18:09:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-02-23 18:09:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 18:09:14,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:14,480 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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 18:09:14,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:14,697 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 18:09:14,698 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:14,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:14,698 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-02-23 18:09:14,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:14,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592857189] [2022-02-23 18:09:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:14,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:14,709 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:14,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [99900644] [2022-02-23 18:09:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:14,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:14,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:14,711 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 18:09:14,719 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 18:09:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:14,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 18:09:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:09:14,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-02-23 18:09:14,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:14,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592857189] [2022-02-23 18:09:14,969 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:14,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99900644] [2022-02-23 18:09:14,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99900644] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:14,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:14,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 18:09:14,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839188934] [2022-02-23 18:09:14,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:14,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:09:14,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:14,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:09:14,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:09:14,970 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 18:09:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:15,006 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-02-23 18:09:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:09:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-02-23 18:09:15,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:15,014 INFO L225 Difference]: With dead ends: 41 [2022-02-23 18:09:15,014 INFO L226 Difference]: Without dead ends: 41 [2022-02-23 18:09:15,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:15,017 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:15,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:15,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-23 18:09:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-23 18:09:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 18:09:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-02-23 18:09:15,033 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-02-23 18:09:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:15,033 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-02-23 18:09:15,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-02-23 18:09:15,033 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-02-23 18:09:15,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 18:09:15,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:15,036 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:15,063 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 18:09:15,240 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 18:09:15,241 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-02-23 18:09:15,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:15,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613353103] [2022-02-23 18:09:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:15,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:15,251 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:15,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054048125] [2022-02-23 18:09:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:15,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:15,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:15,256 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 18:09:15,257 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 18:09:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:15,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 18:09:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-02-23 18:09:15,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:15,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:15,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613353103] [2022-02-23 18:09:15,543 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:15,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054048125] [2022-02-23 18:09:15,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054048125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:15,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:15,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-02-23 18:09:15,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512986104] [2022-02-23 18:09:15,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:15,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-23 18:09:15,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:15,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-23 18:09:15,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:15,544 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:09:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:15,672 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-23 18:09:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:09:15,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-02-23 18:09:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:15,676 INFO L225 Difference]: With dead ends: 52 [2022-02-23 18:09:15,676 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 18:09:15,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:15,678 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:15,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 18:09:15,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-02-23 18:09:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 18:09:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-02-23 18:09:15,691 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-02-23 18:09:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:15,691 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-02-23 18:09:15,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-02-23 18:09:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-02-23 18:09:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 18:09:15,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:15,695 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-02-23 18:09:15,714 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 18:09:15,903 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 18:09:15,903 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:15,904 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-02-23 18:09:15,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:15,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636007326] [2022-02-23 18:09:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:15,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:15,916 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:15,917 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935876019] [2022-02-23 18:09:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:15,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:15,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:15,920 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 18:09:15,921 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 18:09:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:15,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-23 18:09:15,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-02-23 18:09:16,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-02-23 18:09:16,314 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:16,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636007326] [2022-02-23 18:09:16,314 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:16,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935876019] [2022-02-23 18:09:16,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935876019] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:16,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:16,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 18:09:16,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873043221] [2022-02-23 18:09:16,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:16,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:09:16,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:09:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:09:16,316 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-23 18:09:16,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:16,357 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-02-23 18:09:16,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:09:16,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-02-23 18:09:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:16,360 INFO L225 Difference]: With dead ends: 56 [2022-02-23 18:09:16,360 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 18:09:16,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:16,361 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:16,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 18:09:16,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-23 18:09:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 18:09:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-23 18:09:16,373 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-02-23 18:09:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:16,375 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-23 18:09:16,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-02-23 18:09:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-23 18:09:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-23 18:09:16,379 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:16,379 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2022-02-23 18:09:16,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-23 18:09:16,595 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 18:09:16,596 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-02-23 18:09:16,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:16,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208618260] [2022-02-23 18:09:16,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:16,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:16,606 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:16,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52714274] [2022-02-23 18:09:16,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:16,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:16,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:16,608 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 18:09:16,609 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 18:09:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:16,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-23 18:09:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-02-23 18:09:16,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:16,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:16,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208618260] [2022-02-23 18:09:16,899 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:16,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52714274] [2022-02-23 18:09:16,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52714274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:16,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:16,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-02-23 18:09:16,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22618677] [2022-02-23 18:09:16,900 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:16,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 18:09:16,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 18:09:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:09:16,901 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-23 18:09:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:16,986 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-02-23 18:09:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-23 18:09:16,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-02-23 18:09:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:16,987 INFO L225 Difference]: With dead ends: 60 [2022-02-23 18:09:16,987 INFO L226 Difference]: Without dead ends: 60 [2022-02-23 18:09:16,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:16,987 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:16,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-23 18:09:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-02-23 18:09:16,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-23 18:09:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-02-23 18:09:16,991 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-02-23 18:09:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:16,992 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-02-23 18:09:16,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-02-23 18:09:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-02-23 18:09:16,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-23 18:09:16,993 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:16,993 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:17,015 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 18:09:17,215 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 18:09:17,216 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-02-23 18:09:17,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:17,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891000296] [2022-02-23 18:09:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:17,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:17,224 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:17,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782628329] [2022-02-23 18:09:17,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:17,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:17,225 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 18:09:17,226 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 18:09:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:17,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:09:17,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-23 18:09:17,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-02-23 18:09:17,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:17,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891000296] [2022-02-23 18:09:17,537 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:17,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782628329] [2022-02-23 18:09:17,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782628329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:17,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:17,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 18:09:17,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228397965] [2022-02-23 18:09:17,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:17,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:09:17,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:09:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:09:17,539 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-23 18:09:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:17,651 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-23 18:09:17,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:09:17,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-02-23 18:09:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:17,654 INFO L225 Difference]: With dead ends: 98 [2022-02-23 18:09:17,655 INFO L226 Difference]: Without dead ends: 98 [2022-02-23 18:09:17,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 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 18:09:17,655 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 32 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:17,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 281 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:17,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-23 18:09:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-02-23 18:09:17,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-02-23 18:09:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-02-23 18:09:17,661 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-02-23 18:09:17,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:17,661 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-02-23 18:09:17,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-02-23 18:09:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-02-23 18:09:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 18:09:17,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:17,662 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1] [2022-02-23 18:09:17,685 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 18:09:17,863 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 18:09:17,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:17,864 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-02-23 18:09:17,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:17,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610327532] [2022-02-23 18:09:17,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:17,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:17,873 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:17,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143978662] [2022-02-23 18:09:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:17,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:17,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:17,877 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 18:09:17,878 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 18:09:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:17,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-02-23 18:09:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 18:09:18,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-02-23 18:09:18,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:18,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610327532] [2022-02-23 18:09:18,248 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:18,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143978662] [2022-02-23 18:09:18,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143978662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:18,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:18,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-02-23 18:09:18,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650589163] [2022-02-23 18:09:18,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:18,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-23 18:09:18,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:18,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-23 18:09:18,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:09:18,249 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:09:18,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:18,431 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2022-02-23 18:09:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:09:18,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-02-23 18:09:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:18,434 INFO L225 Difference]: With dead ends: 130 [2022-02-23 18:09:18,434 INFO L226 Difference]: Without dead ends: 128 [2022-02-23 18:09:18,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:09:18,434 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:18,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-23 18:09:18,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-02-23 18:09:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-23 18:09:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-02-23 18:09:18,450 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-02-23 18:09:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:18,450 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-02-23 18:09:18,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-02-23 18:09:18,450 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-02-23 18:09:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-23 18:09:18,451 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:18,451 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1] [2022-02-23 18:09:18,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:18,660 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 18:09:18,660 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:18,661 INFO L85 PathProgramCache]: Analyzing trace with hash -271689658, now seen corresponding path program 2 times [2022-02-23 18:09:18,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:18,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138179471] [2022-02-23 18:09:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:18,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:18,669 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:18,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239460875] [2022-02-23 18:09:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:09:18,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:18,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:18,671 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 18:09:18,672 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 18:09:18,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:09:18,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:09:18,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-23 18:09:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-02-23 18:09:19,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-02-23 18:09:19,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:19,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138179471] [2022-02-23 18:09:19,312 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:19,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239460875] [2022-02-23 18:09:19,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239460875] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:19,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:19,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-02-23 18:09:19,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394591975] [2022-02-23 18:09:19,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:19,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 18:09:19,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 18:09:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-23 18:09:19,314 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-23 18:09:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:20,610 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-02-23 18:09:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 18:09:20,610 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-02-23 18:09:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:20,611 INFO L225 Difference]: With dead ends: 126 [2022-02-23 18:09:20,611 INFO L226 Difference]: Without dead ends: 126 [2022-02-23 18:09:20,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-02-23 18:09:20,612 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:20,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 330 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 18:09:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-23 18:09:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-02-23 18:09:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-02-23 18:09:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-02-23 18:09:20,619 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-02-23 18:09:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:20,619 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-02-23 18:09:20,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-02-23 18:09:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-02-23 18:09:20,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-23 18:09:20,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:20,620 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2022-02-23 18:09:20,636 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 18:09:20,827 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 18:09:20,828 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1540307954, now seen corresponding path program 3 times [2022-02-23 18:09:20,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:20,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159027899] [2022-02-23 18:09:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:20,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:20,839 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:20,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857469821] [2022-02-23 18:09:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 18:09:20,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:20,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:20,840 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 18:09:20,864 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 18:09:20,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-23 18:09:20,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:09:20,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-23 18:09:20,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-02-23 18:09:21,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:21,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:21,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159027899] [2022-02-23 18:09:21,398 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:21,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857469821] [2022-02-23 18:09:21,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857469821] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:09:21,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:09:21,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 18:09:21,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579667470] [2022-02-23 18:09:21,399 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:21,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:09:21,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:21,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:09:21,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-23 18:09:21,401 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-23 18:09:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:21,561 INFO L93 Difference]: Finished difference Result 142 states and 179 transitions. [2022-02-23 18:09:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:09:21,563 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-02-23 18:09:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:21,564 INFO L225 Difference]: With dead ends: 142 [2022-02-23 18:09:21,564 INFO L226 Difference]: Without dead ends: 142 [2022-02-23 18:09:21,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:21,565 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:21,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:09:21,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-23 18:09:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-02-23 18:09:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-02-23 18:09:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-02-23 18:09:21,574 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-02-23 18:09:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:21,574 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-02-23 18:09:21,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-02-23 18:09:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-02-23 18:09:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 18:09:21,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:21,580 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2022-02-23 18:09:21,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 18:09:21,799 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 18:09:21,800 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:21,800 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-02-23 18:09:21,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:21,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215989141] [2022-02-23 18:09:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:21,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:21,808 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:21,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876254971] [2022-02-23 18:09:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:21,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:21,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:21,811 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 18:09:21,814 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 18:09:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 18:09:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-23 18:09:22,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-02-23 18:09:22,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:22,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215989141] [2022-02-23 18:09:22,571 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:22,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876254971] [2022-02-23 18:09:22,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876254971] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:22,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:22,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-02-23 18:09:22,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18139382] [2022-02-23 18:09:22,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:22,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 18:09:22,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:22,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 18:09:22,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:09:22,572 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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 18:09:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:24,162 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-02-23 18:09:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-23 18:09:24,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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 91 [2022-02-23 18:09:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:24,164 INFO L225 Difference]: With dead ends: 226 [2022-02-23 18:09:24,164 INFO L226 Difference]: Without dead ends: 220 [2022-02-23 18:09:24,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-02-23 18:09:24,165 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 58 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:24,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 402 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-23 18:09:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-23 18:09:24,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-02-23 18:09:24,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-02-23 18:09:24,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-02-23 18:09:24,174 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-02-23 18:09:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:24,175 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-02-23 18:09:24,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 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 18:09:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-02-23 18:09:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-23 18:09:24,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:24,183 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-02-23 18:09:24,218 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 18:09:24,399 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 18:09:24,399 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:24,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1708635976, now seen corresponding path program 1 times [2022-02-23 18:09:24,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:24,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659827661] [2022-02-23 18:09:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:24,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:24,409 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:24,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421283439] [2022-02-23 18:09:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:24,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:24,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:24,416 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 18:09:24,417 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 18:09:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:09:24,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2022-02-23 18:09:24,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-02-23 18:09:25,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:26,512 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-02-23 18:09:26,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:26,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659827661] [2022-02-23 18:09:26,512 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:26,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421283439] [2022-02-23 18:09:26,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421283439] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:26,512 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:26,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-02-23 18:09:26,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222715804] [2022-02-23 18:09:26,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:26,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-23 18:09:26,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:26,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-23 18:09:26,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-02-23 18:09:26,513 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-23 18:09:29,771 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 18:09:31,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:09:34,621 WARN L534 Checker$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 18:09:36,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:09:38,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:09:41,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:09:44,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:09:46,059 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 18:09:46,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:46,072 INFO L93 Difference]: Finished difference Result 267 states and 371 transitions. [2022-02-23 18:09:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-23 18:09:46,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) Word has length 107 [2022-02-23 18:09:46,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:46,074 INFO L225 Difference]: With dead ends: 267 [2022-02-23 18:09:46,074 INFO L226 Difference]: Without dead ends: 267 [2022-02-23 18:09:46,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:09:46,074 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 62 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 122 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:46,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 371 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 524 Invalid, 7 Unknown, 0 Unchecked, 18.0s Time] [2022-02-23 18:09:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-02-23 18:09:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 254. [2022-02-23 18:09:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 140 states have internal predecessors, (161), 97 states have call successors, (97), 20 states have call predecessors, (97), 19 states have return successors, (95), 93 states have call predecessors, (95), 95 states have call successors, (95) [2022-02-23 18:09:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 353 transitions. [2022-02-23 18:09:46,084 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 353 transitions. Word has length 107 [2022-02-23 18:09:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:46,084 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 353 transitions. [2022-02-23 18:09:46,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 10 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) [2022-02-23 18:09:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 353 transitions. [2022-02-23 18:09:46,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-23 18:09:46,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:46,085 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 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, 1] [2022-02-23 18:09:46,107 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 18:09:46,285 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 18:09:46,286 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash -426906627, now seen corresponding path program 4 times [2022-02-23 18:09:46,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:46,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435106821] [2022-02-23 18:09:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:46,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:46,297 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:46,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999576862] [2022-02-23 18:09:46,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 18:09:46,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:46,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:46,301 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 18:09:46,304 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 18:09:46,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 18:09:46,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:09:46,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 18:09:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:46,474 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-02-23 18:09:46,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 18:09:46,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:46,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435106821] [2022-02-23 18:09:46,474 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:46,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999576862] [2022-02-23 18:09:46,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999576862] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:09:46,475 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:09:46,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 18:09:46,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235217033] [2022-02-23 18:09:46,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:09:46,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:09:46,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:46,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:09:46,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 18:09:46,476 INFO L87 Difference]: Start difference. First operand 254 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-02-23 18:09:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:46,523 INFO L93 Difference]: Finished difference Result 232 states and 311 transitions. [2022-02-23 18:09:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:09:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-02-23 18:09:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:46,525 INFO L225 Difference]: With dead ends: 232 [2022-02-23 18:09:46,525 INFO L226 Difference]: Without dead ends: 232 [2022-02-23 18:09:46,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 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 18:09:46,526 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:46,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 18:09:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-23 18:09:46,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 213. [2022-02-23 18:09:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 118 states have internal predecessors, (131), 77 states have call successors, (77), 20 states have call predecessors, (77), 19 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2022-02-23 18:09:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 283 transitions. [2022-02-23 18:09:46,533 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 283 transitions. Word has length 110 [2022-02-23 18:09:46,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:46,533 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 283 transitions. [2022-02-23 18:09:46,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-02-23 18:09:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 283 transitions. [2022-02-23 18:09:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-23 18:09:46,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:09:46,535 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 18:09:46,556 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 18:09:46,756 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 18:09:46,756 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:09:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:09:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -928796440, now seen corresponding path program 2 times [2022-02-23 18:09:46,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:09:46,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801365108] [2022-02-23 18:09:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:09:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:09:46,787 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:09:46,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976304033] [2022-02-23 18:09:46,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:09:46,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:09:46,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:09:46,795 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 18:09:46,797 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 18:09:46,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:09:46,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:09:46,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 82 conjunts are in the unsatisfiable core [2022-02-23 18:09:46,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:09:47,795 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 18:09:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 138 proven. 102 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2022-02-23 18:09:47,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:09:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 169 proven. 21 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2022-02-23 18:09:49,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:09:49,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801365108] [2022-02-23 18:09:49,902 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:09:49,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976304033] [2022-02-23 18:09:49,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976304033] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:09:49,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:09:49,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 27 [2022-02-23 18:09:49,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599806872] [2022-02-23 18:09:49,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:09:49,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-23 18:09:49,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:09:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-23 18:09:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-23 18:09:49,905 INFO L87 Difference]: Start difference. First operand 213 states and 283 transitions. Second operand has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 15 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 16 states have call predecessors, (41), 13 states have call successors, (41) [2022-02-23 18:10:03,454 WARN L232 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 87 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:10:11,488 WARN L232 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 87 DAG size of output: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:10:19,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:10:19,001 INFO L93 Difference]: Finished difference Result 275 states and 362 transitions. [2022-02-23 18:10:19,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-23 18:10:19,002 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 15 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 16 states have call predecessors, (41), 13 states have call successors, (41) Word has length 138 [2022-02-23 18:10:19,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:10:19,003 INFO L225 Difference]: With dead ends: 275 [2022-02-23 18:10:19,003 INFO L226 Difference]: Without dead ends: 269 [2022-02-23 18:10:19,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 18:10:19,004 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 65 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-02-23 18:10:19,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 712 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-02-23 18:10:19,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-23 18:10:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2022-02-23 18:10:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 126 states have (on average 1.0873015873015872) internal successors, (137), 127 states have internal predecessors, (137), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (71), 70 states have call predecessors, (71), 71 states have call successors, (71) [2022-02-23 18:10:19,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 280 transitions. [2022-02-23 18:10:19,016 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 280 transitions. Word has length 138 [2022-02-23 18:10:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:10:19,017 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 280 transitions. [2022-02-23 18:10:19,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 22 states have internal predecessors, (51), 15 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 16 states have call predecessors, (41), 13 states have call successors, (41) [2022-02-23 18:10:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 280 transitions. [2022-02-23 18:10:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-02-23 18:10:19,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:10:19,018 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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, 1] [2022-02-23 18:10:19,041 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 18:10:19,235 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 18:10:19,235 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:10:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:10:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1866948721, now seen corresponding path program 2 times [2022-02-23 18:10:19,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:10:19,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066621515] [2022-02-23 18:10:19,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:10:19,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:10:19,242 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:10:19,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493220083] [2022-02-23 18:10:19,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:10:19,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:10:19,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:10:19,244 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 18:10:19,245 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 18:10:19,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:10:19,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:10:19,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 85 conjunts are in the unsatisfiable core [2022-02-23 18:10:19,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:10:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 163 proven. 118 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-02-23 18:10:20,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:11:02,119 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse14 (* c_main_~s~0 c_main_~k~0)) (.cse15 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse8 (+ (* (- 2) c_main_~p~0) c_main_~q~0 (* (- 2) .cse15))) (.cse7 (+ (* 2 .cse14) (* (- 2) c_main_~r~0) c_main_~s~0))) (let ((.cse9 (* c_main_~q~0 c_main_~x~0)) (.cse10 (* c_main_~s~0 c_main_~y~0)) (.cse5 (* .cse7 c_main_~y~0)) (.cse6 (* .cse8 c_main_~x~0)) (.cse2 (+ c_main_~p~0 .cse15)) (.cse3 (+ c_main_~r~0 (* (- 1) .cse14)))) (let ((.cse0 (* .cse3 c_main_~y~0)) (.cse1 (* .cse2 c_main_~x~0)) (.cse4 (+ .cse5 .cse6)) (.cse11 (* 2 (* c_main_~r~0 c_main_~y~0))) (.cse12 (* 2 (* c_main_~p~0 c_main_~x~0))) (.cse13 (+ .cse9 .cse10 (* 2 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (* 2 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))))) (or (not (= (+ .cse0 .cse1 (* c_main_~c~0 c_main_~y~0)) (+ (* c_main_~xy~0 .cse2) c_main_~c~0 (* c_main_~yy~0 .cse3)))) (not (= c_main_~c~0 (+ .cse0 .cse1))) (= .cse4 0) (= (+ .cse5 .cse6 (* .cse4 c_main_~y~0)) (+ .cse5 (* c_main_~yy~0 .cse7) .cse6 (* c_main_~xy~0 .cse8))) (not (= (+ c_main_~b~0 (* (- 1) c_main_~c~0)) (+ (* (- 2) .cse2 c_main_~x~0) (* (- 1) .cse2 c_main_~x~0 0) .cse9 (* (- 2) .cse3 c_main_~y~0) c_main_~c~0 .cse10 (* (- 1) .cse3 c_main_~y~0 0)))) (<= (+ c_main_~c~0 .cse11 .cse12) .cse13) (not (<= (+ .cse11 .cse12) .cse13))))))) is different from true [2022-02-23 18:11:41,476 WARN L232 SmtUtils]: Spent 11.20s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:12:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 169 proven. 70 refuted. 5 times theorem prover too weak. 600 trivial. 1 not checked. [2022-02-23 18:12:58,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:12:58,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066621515] [2022-02-23 18:12:58,245 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:12:58,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493220083] [2022-02-23 18:12:58,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493220083] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:12:58,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:12:58,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 30 [2022-02-23 18:12:58,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341844853] [2022-02-23 18:12:58,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:12:58,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-23 18:12:58,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:12:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-23 18:12:58,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=614, Unknown=6, NotChecked=54, Total=870 [2022-02-23 18:12:58,248 INFO L87 Difference]: Start difference. First operand 223 states and 280 transitions. Second operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 26 states have internal predecessors, (54), 15 states have call successors, (50), 2 states have call predecessors, (50), 2 states have return successors, (47), 16 states have call predecessors, (47), 14 states have call successors, (47) [2022-02-23 18:13:01,430 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:03,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:05,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:07,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:09,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:13:49,417 WARN L232 SmtUtils]: Spent 38.38s on a formula simplification. DAG size of input: 129 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:15:00,795 WARN L232 SmtUtils]: Spent 1.18m on a formula simplification. DAG size of input: 139 DAG size of output: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:15:03,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:15:05,998 WARN L534 Checker$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 18:15:08,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:29,082 WARN L232 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 138 DAG size of output: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:16:31,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:33,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:16:35,211 WARN L534 Checker$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 18:16:53,144 WARN L232 SmtUtils]: Spent 13.71s on a formula simplification. DAG size of input: 88 DAG size of output: 87 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:16:55,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:29,504 WARN L232 SmtUtils]: Spent 33.66s on a formula simplification. DAG size of input: 128 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:17:31,697 WARN L534 Checker$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 18:17:34,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:36,361 WARN L534 Checker$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 18:17:38,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:40,738 WARN L534 Checker$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 18:17:42,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:17:44,788 WARN L534 Checker$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 18:17:46,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:18:25,476 WARN L232 SmtUtils]: Spent 29.81s on a formula simplification. DAG size of input: 117 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:18:27,521 WARN L534 Checker$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 18:18:30,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:18:32,410 WARN L534 Checker$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 18:19:03,590 WARN L232 SmtUtils]: Spent 28.89s on a formula simplification that was a NOOP. DAG size: 153 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:19:06,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:19:10,333 WARN L534 Checker$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 18:19:13,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:19:15,505 WARN L534 Checker$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 18:19:17,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:10,580 WARN L232 SmtUtils]: Spent 52.07s on a formula simplification. DAG size of input: 129 DAG size of output: 81 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:20:12,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:14,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:16,758 WARN L534 Checker$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 18:20:19,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:23,958 WARN L534 Checker$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 18:20:41,780 WARN L232 SmtUtils]: Spent 17.37s on a formula simplification. DAG size of input: 182 DAG size of output: 136 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:20:44,180 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:20:46,182 WARN L534 Checker$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 18:21:11,253 WARN L232 SmtUtils]: Spent 24.11s on a formula simplification. DAG size of input: 130 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:21:13,382 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:21:15,629 WARN L534 Checker$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 18:21:18,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:21:20,907 WARN L534 Checker$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 18:21:22,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:21:24,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:22:00,562 WARN L232 SmtUtils]: Spent 30.06s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-23 18:22:02,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:22:04,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:22:06,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:22:08,984 WARN L534 Checker$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 18:22:10,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-23 18:22:12,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []