/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_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 18:08:47,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 18:08:47,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 18:08:47,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 18:08:47,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 18:08:47,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 18:08:47,779 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 18:08:47,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 18:08:47,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 18:08:47,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 18:08:47,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 18:08:47,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 18:08:47,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 18:08:47,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 18:08:47,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 18:08:47,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 18:08:47,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 18:08:47,793 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 18:08:47,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 18:08:47,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 18:08:47,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 18:08:47,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 18:08:47,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 18:08:47,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 18:08:47,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 18:08:47,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-23 18:08:47,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-23 18:08:47,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-23 18:08:47,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-23 18:08:47,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-23 18:08:47,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-23 18:08:47,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-23 18:08:47,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-23 18:08:47,812 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 18:08:47,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 18:08:47,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 18:08:47,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 18:08:47,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 18:08:47,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 18:08:47,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 18:08:47,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 18:08:47,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 18:08:47,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 18:08:47,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 18:08:47,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 18:08:47,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 18:08:47,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 18:08:47,825 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 18:08:47,825 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 18:08:47,825 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 18:08:47,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 18:08:47,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 18:08:47,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 18:08:47,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 18:08:47,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 18:08:47,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:08:47,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 18:08:47,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 18:08:47,827 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 18:08:47,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 18:08:48,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 18:08:48,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 18:08:48,075 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 18:08:48,075 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 18:08:48,076 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 18:08:48,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2022-02-23 18:08:48,121 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d25608ec/f58050d14ee94ad398056862e8f67268/FLAG07eea2b0d [2022-02-23 18:08:48,424 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 18:08:48,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2022-02-23 18:08:48,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d25608ec/f58050d14ee94ad398056862e8f67268/FLAG07eea2b0d [2022-02-23 18:08:48,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d25608ec/f58050d14ee94ad398056862e8f67268 [2022-02-23 18:08:48,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 18:08:48,866 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 18:08:48,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 18:08:48,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 18:08:48,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 18:08:48,877 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:08:48" (1/1) ... [2022-02-23 18:08:48,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451cd456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:48, skipping insertion in model container [2022-02-23 18:08:48,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:08:48" (1/1) ... [2022-02-23 18:08:48,882 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 18:08:48,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 18:08:49,019 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_valuebound1.c[490,503] [2022-02-23 18:08:49,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:08:49,039 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 18:08:49,046 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_valuebound1.c[490,503] [2022-02-23 18:08:49,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 18:08:49,075 INFO L208 MainTranslator]: Completed translation [2022-02-23 18:08:49,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49 WrapperNode [2022-02-23 18:08:49,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 18:08:49,077 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 18:08:49,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 18:08:49,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 18:08:49,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,088 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 18:08:49,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 18:08:49,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 18:08:49,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 18:08:49,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 18:08:49,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:49,122 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 18:08:49,128 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 18:08:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 18:08:49,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 18:08:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 18:08:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 18:08:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 18:08:49,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 18:08:49,146 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 18:08:49,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 18:08:49,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 18:08:49,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 18:08:49,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 18:08:49,193 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 18:08:49,195 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 18:08:49,328 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 18:08:49,332 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 18:08:49,332 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-23 18:08:49,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:08:49 BoogieIcfgContainer [2022-02-23 18:08:49,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 18:08:49,334 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 18:08:49,335 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 18:08:49,335 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 18:08:49,338 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:08:49" (1/1) ... [2022-02-23 18:08:49,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:08:49 BasicIcfg [2022-02-23 18:08:49,352 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 18:08:49,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 18:08:49,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 18:08:49,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 18:08:49,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:08:48" (1/4) ... [2022-02-23 18:08:49,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a58b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:08:49, skipping insertion in model container [2022-02-23 18:08:49,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:08:49" (2/4) ... [2022-02-23 18:08:49,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a58b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:08:49, skipping insertion in model container [2022-02-23 18:08:49,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:08:49" (3/4) ... [2022-02-23 18:08:49,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66a58b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:08:49, skipping insertion in model container [2022-02-23 18:08:49,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 06:08:49" (4/4) ... [2022-02-23 18:08:49,359 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound1.cJordan [2022-02-23 18:08:49,363 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 18:08:49,364 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 18:08:49,395 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 18:08:49,400 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 18:08:49,400 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 18:08:49,414 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 18:08:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-23 18:08:49,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:49,420 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 18:08:49,421 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2022-02-23 18:08:49,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:49,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640036896] [2022-02-23 18:08:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:49,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 18:08:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 18:08:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-02-23 18:08:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-02-23 18:08:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-02-23 18:08:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-02-23 18:08:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-23 18:08:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,619 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 18:08:49,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:49,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640036896] [2022-02-23 18:08:49,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640036896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 18:08:49,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 18:08:49,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 18:08:49,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114090792] [2022-02-23 18:08:49,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:08:49,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 18:08:49,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:49,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 18:08:49,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 18:08:49,644 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 18:08:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:49,737 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-02-23 18:08:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 18:08:49,740 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 18:08:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:49,746 INFO L225 Difference]: With dead ends: 40 [2022-02-23 18:08:49,746 INFO L226 Difference]: Without dead ends: 35 [2022-02-23 18:08:49,747 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 18:08:49,752 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 18:08:49,753 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 18:08:49,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-23 18:08:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-23 18:08:49,778 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 18:08:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-02-23 18:08:49,780 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-02-23 18:08:49,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:49,780 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-02-23 18:08:49,780 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 18:08:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-02-23 18:08:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-23 18:08:49,782 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:49,782 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 18:08:49,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 18:08:49,782 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:49,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2022-02-23 18:08:49,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:49,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065594017] [2022-02-23 18:08:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:49,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:49,798 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:49,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116057120] [2022-02-23 18:08:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:49,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:49,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:49,802 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 18:08:49,803 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 18:08:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 18:08:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:49,979 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 18:08:49,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:50,086 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 18:08:50,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:50,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065594017] [2022-02-23 18:08:50,087 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:50,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116057120] [2022-02-23 18:08:50,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116057120] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:08:50,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:08:50,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-02-23 18:08:50,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266422376] [2022-02-23 18:08:50,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:50,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-23 18:08:50,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-23 18:08:50,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-23 18:08:50,090 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 18:08:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:50,173 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-02-23 18:08:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 18:08:50,173 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 18:08:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:50,176 INFO L225 Difference]: With dead ends: 44 [2022-02-23 18:08:50,176 INFO L226 Difference]: Without dead ends: 44 [2022-02-23 18:08:50,177 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 18:08:50,179 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 18:08:50,180 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 18:08:50,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-23 18:08:50,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-02-23 18:08:50,193 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 18:08:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-02-23 18:08:50,195 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-02-23 18:08:50,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:50,195 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-02-23 18:08:50,195 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 18:08:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-02-23 18:08:50,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-23 18:08:50,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:50,197 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 18:08:50,217 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 18:08:50,399 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 18:08:50,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:50,400 INFO L85 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2022-02-23 18:08:50,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:50,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212104443] [2022-02-23 18:08:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:50,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:50,412 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:50,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685725502] [2022-02-23 18:08:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:50,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:50,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:50,414 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 18:08:50,415 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 18:08:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:50,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-02-23 18:08:50,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:50,623 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 18:08:50,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:50,743 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 18:08:50,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:50,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212104443] [2022-02-23 18:08:50,744 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:50,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685725502] [2022-02-23 18:08:50,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685725502] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 18:08:50,744 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:08:50,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-02-23 18:08:50,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413078594] [2022-02-23 18:08:50,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 18:08:50,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 18:08:50,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:50,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 18:08:50,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:08:50,774 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 18:08:50,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:50,829 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-02-23 18:08:50,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 18:08:50,830 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 18:08:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:50,830 INFO L225 Difference]: With dead ends: 41 [2022-02-23 18:08:50,830 INFO L226 Difference]: Without dead ends: 41 [2022-02-23 18:08:50,831 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 18:08:50,831 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 18:08:50,832 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 18:08:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-23 18:08:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-02-23 18:08:50,835 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 18:08:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-02-23 18:08:50,836 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-02-23 18:08:50,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:50,836 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-02-23 18:08:50,836 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 18:08:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-02-23 18:08:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-23 18:08:50,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:50,837 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 18:08:50,855 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 18:08:51,041 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 18:08:51,041 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:51,042 INFO L85 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2022-02-23 18:08:51,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:51,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845327378] [2022-02-23 18:08:51,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:51,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:51,056 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:51,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738707947] [2022-02-23 18:08:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:51,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:51,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:51,064 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 18:08:51,065 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 18:08:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:51,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-23 18:08:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-23 18:08:51,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:51,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:51,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845327378] [2022-02-23 18:08:51,386 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:51,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738707947] [2022-02-23 18:08:51,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738707947] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:08:51,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:08:51,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-02-23 18:08:51,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688399462] [2022-02-23 18:08:51,387 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:51,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-23 18:08:51,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-23 18:08:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:08:51,388 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-23 18:08:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:51,503 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-02-23 18:08:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-23 18:08:51,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-02-23 18:08:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:51,504 INFO L225 Difference]: With dead ends: 52 [2022-02-23 18:08:51,504 INFO L226 Difference]: Without dead ends: 52 [2022-02-23 18:08:51,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:08:51,505 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:08:51,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 196 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:08:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-23 18:08:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-02-23 18:08:51,509 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 18:08:51,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-02-23 18:08:51,510 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-02-23 18:08:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:51,510 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-02-23 18:08:51,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-02-23 18:08:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-02-23 18:08:51,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-23 18:08:51,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:51,512 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 18:08:51,529 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 18:08:51,725 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 18:08:51,725 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2022-02-23 18:08:51,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:51,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265989982] [2022-02-23 18:08:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:51,738 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:51,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597065043] [2022-02-23 18:08:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:51,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:51,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:51,741 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 18:08:51,742 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 18:08:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:51,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 18:08:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-02-23 18:08:52,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:52,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:52,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265989982] [2022-02-23 18:08:52,043 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:52,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597065043] [2022-02-23 18:08:52,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597065043] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:08:52,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:08:52,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-02-23 18:08:52,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630774122] [2022-02-23 18:08:52,044 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:52,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:08:52,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:52,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:08:52,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-23 18:08:52,044 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-23 18:08:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:52,142 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-02-23 18:08:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:08:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2022-02-23 18:08:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:52,144 INFO L225 Difference]: With dead ends: 56 [2022-02-23 18:08:52,144 INFO L226 Difference]: Without dead ends: 56 [2022-02-23 18:08:52,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-02-23 18:08:52,145 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 22 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:08:52,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 215 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:08:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-23 18:08:52,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-23 18:08:52,152 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 18:08:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-02-23 18:08:52,153 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-02-23 18:08:52,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:52,153 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-02-23 18:08:52,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-02-23 18:08:52,154 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-02-23 18:08:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-23 18:08:52,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:52,154 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 18:08:52,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 18:08:52,367 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 18:08:52,367 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2022-02-23 18:08:52,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:52,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993039793] [2022-02-23 18:08:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:52,380 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:52,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406976901] [2022-02-23 18:08:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:52,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:52,384 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 18:08:52,386 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 18:08:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:52,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 37 conjunts are in the unsatisfiable core [2022-02-23 18:08:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-02-23 18:08:52,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:52,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:52,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993039793] [2022-02-23 18:08:52,846 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:52,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406976901] [2022-02-23 18:08:52,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406976901] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-23 18:08:52,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-02-23 18:08:52,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-02-23 18:08:52,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293257084] [2022-02-23 18:08:52,846 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:52,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-23 18:08:52,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:52,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-23 18:08:52,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:08:52,847 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-02-23 18:08:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:52,995 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-02-23 18:08:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 18:08:52,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 60 [2022-02-23 18:08:52,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:53,000 INFO L225 Difference]: With dead ends: 62 [2022-02-23 18:08:53,000 INFO L226 Difference]: Without dead ends: 62 [2022-02-23 18:08:53,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-23 18:08:53,002 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 52 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:08:53,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 159 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:08:53,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-23 18:08:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-02-23 18:08:53,015 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 18:08:53,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-02-23 18:08:53,016 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-02-23 18:08:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:53,016 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-02-23 18:08:53,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-02-23 18:08:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-02-23 18:08:53,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-23 18:08:53,017 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:53,017 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 18:08:53,037 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 18:08:53,227 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 18:08:53,228 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2022-02-23 18:08:53,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:53,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895897909] [2022-02-23 18:08:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:53,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:53,237 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:53,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205826230] [2022-02-23 18:08:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:53,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:53,239 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 18:08:53,240 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 18:08:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:53,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-23 18:08:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:53,385 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 18:08:53,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:53,504 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 18:08:53,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:53,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895897909] [2022-02-23 18:08:53,505 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:53,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205826230] [2022-02-23 18:08:53,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205826230] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:08:53,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:08:53,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-02-23 18:08:53,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145320295] [2022-02-23 18:08:53,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:53,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 18:08:53,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 18:08:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-23 18:08:53,507 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 18:08:53,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:53,624 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-02-23 18:08:53,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 18:08:53,627 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 18:08:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:53,628 INFO L225 Difference]: With dead ends: 98 [2022-02-23 18:08:53,628 INFO L226 Difference]: Without dead ends: 98 [2022-02-23 18:08:53,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-23 18:08:53,628 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:08:53,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 385 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:08:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-23 18:08:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-02-23 18:08:53,634 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 18:08:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-02-23 18:08:53,635 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-02-23 18:08:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:53,635 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-02-23 18:08:53,635 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 18:08:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-02-23 18:08:53,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-23 18:08:53,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:53,636 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 18:08:53,673 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 18:08:53,847 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 18:08:53,848 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash -966489810, now seen corresponding path program 1 times [2022-02-23 18:08:53,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:53,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597568435] [2022-02-23 18:08:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:53,857 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:53,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040517904] [2022-02-23 18:08:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:53,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:53,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:53,858 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 18:08:53,859 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 18:08:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:53,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 17 conjunts are in the unsatisfiable core [2022-02-23 18:08:53,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 35 proven. 18 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-02-23 18:08:54,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-02-23 18:08:54,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:54,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597568435] [2022-02-23 18:08:54,283 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:54,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040517904] [2022-02-23 18:08:54,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040517904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:08:54,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:08:54,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2022-02-23 18:08:54,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756333896] [2022-02-23 18:08:54,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:54,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 18:08:54,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 18:08:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-02-23 18:08:54,285 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 15 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-02-23 18:08:54,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:54,423 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-02-23 18:08:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:08:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) Word has length 75 [2022-02-23 18:08:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:54,424 INFO L225 Difference]: With dead ends: 59 [2022-02-23 18:08:54,424 INFO L226 Difference]: Without dead ends: 59 [2022-02-23 18:08:54,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-02-23 18:08:54,425 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 40 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 18:08:54,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 249 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 18:08:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-23 18:08:54,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-23 18:08:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 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 18:08:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-02-23 18:08:54,429 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 75 [2022-02-23 18:08:54,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:54,429 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-02-23 18:08:54,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 11 states have internal predecessors, (37), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2022-02-23 18:08:54,429 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-02-23 18:08:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-23 18:08:54,430 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:54,430 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 18:08:54,454 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 18:08:54,652 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 18:08:54,653 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:54,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2022-02-23 18:08:54,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:54,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842936569] [2022-02-23 18:08:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:54,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:54,680 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:54,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [215897987] [2022-02-23 18:08:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:54,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:54,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:54,681 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 18:08:54,697 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 18:08:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:54,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 18:08:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-02-23 18:08:55,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-02-23 18:08:55,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:55,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842936569] [2022-02-23 18:08:55,744 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:55,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215897987] [2022-02-23 18:08:55,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215897987] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:08:55,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:08:55,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-02-23 18:08:55,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291297138] [2022-02-23 18:08:55,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:55,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 18:08:55,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:55,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 18:08:55,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-23 18:08:55,746 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-02-23 18:08:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:57,268 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2022-02-23 18:08:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-23 18:08:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 91 [2022-02-23 18:08:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:57,269 INFO L225 Difference]: With dead ends: 89 [2022-02-23 18:08:57,270 INFO L226 Difference]: Without dead ends: 89 [2022-02-23 18:08:57,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2022-02-23 18:08:57,270 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 46 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-23 18:08:57,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 472 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-23 18:08:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-23 18:08:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2022-02-23 18:08:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 18:08:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2022-02-23 18:08:57,275 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 91 [2022-02-23 18:08:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:57,275 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2022-02-23 18:08:57,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 11 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-02-23 18:08:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2022-02-23 18:08:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-23 18:08:57,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:57,276 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 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, 1, 1] [2022-02-23 18:08:57,302 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 18:08:57,499 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 18:08:57,500 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:57,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:57,500 INFO L85 PathProgramCache]: Analyzing trace with hash -371592377, now seen corresponding path program 1 times [2022-02-23 18:08:57,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:57,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865990285] [2022-02-23 18:08:57,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:57,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:57,515 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:57,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1023794418] [2022-02-23 18:08:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:57,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:57,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:57,521 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 18:08:57,522 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 18:08:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 18:08:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjunts are in the unsatisfiable core [2022-02-23 18:08:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:58,001 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-02-23 18:08:58,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-02-23 18:08:58,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:58,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865990285] [2022-02-23 18:08:58,222 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:58,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023794418] [2022-02-23 18:08:58,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023794418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:08:58,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:08:58,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 19 [2022-02-23 18:08:58,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154215451] [2022-02-23 18:08:58,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:58,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-23 18:08:58,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:58,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-23 18:08:58,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-23 18:08:58,224 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) [2022-02-23 18:08:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:08:58,869 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2022-02-23 18:08:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 18:08:58,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) Word has length 96 [2022-02-23 18:08:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:08:58,870 INFO L225 Difference]: With dead ends: 87 [2022-02-23 18:08:58,871 INFO L226 Difference]: Without dead ends: 72 [2022-02-23 18:08:58,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-23 18:08:58,871 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-23 18:08:58,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 261 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-23 18:08:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-23 18:08:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-23 18:08:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 25 states have call successors, (25), 9 states have call predecessors, (25), 7 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-02-23 18:08:58,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-02-23 18:08:58,875 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 96 [2022-02-23 18:08:58,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:08:58,876 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-02-23 18:08:58,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 16 states have internal predecessors, (41), 9 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 9 states have call predecessors, (29), 9 states have call successors, (29) [2022-02-23 18:08:58,876 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-02-23 18:08:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-23 18:08:58,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 18:08:58,877 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 18:08:58,896 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 18:08:59,094 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 18:08:59,095 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 18:08:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 18:08:59,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1694952883, now seen corresponding path program 2 times [2022-02-23 18:08:59,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 18:08:59,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766955259] [2022-02-23 18:08:59,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 18:08:59,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 18:08:59,107 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 18:08:59,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792769671] [2022-02-23 18:08:59,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 18:08:59,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 18:08:59,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 18:08:59,109 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 18:08:59,110 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 18:08:59,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 18:08:59,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 18:08:59,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 18:08:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 18:08:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-02-23 18:08:59,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 18:08:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 34 proven. 51 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-02-23 18:08:59,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 18:08:59,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766955259] [2022-02-23 18:08:59,728 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 18:08:59,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792769671] [2022-02-23 18:08:59,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792769671] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 18:08:59,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 18:08:59,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-02-23 18:08:59,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978346541] [2022-02-23 18:08:59,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 18:08:59,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 18:08:59,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 18:08:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 18:08:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-23 18:08:59,731 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2022-02-23 18:09:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 18:09:00,042 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2022-02-23 18:09:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 18:09:00,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) Word has length 135 [2022-02-23 18:09:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 18:09:00,043 INFO L225 Difference]: With dead ends: 64 [2022-02-23 18:09:00,043 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 18:09:00,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-02-23 18:09:00,044 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 18:09:00,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 407 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 18:09:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 18:09:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 18:09:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-23 18:09:00,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 18:09:00,045 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2022-02-23 18:09:00,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 18:09:00,045 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 18:09:00,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (45), 13 states have call predecessors, (45), 13 states have call successors, (45) [2022-02-23 18:09:00,045 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 18:09:00,045 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 18:09:00,047 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 18:09:00,066 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 18:09:00,259 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 18:09:00,262 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 18:09:00,263 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 18:09:00,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:09:00 BasicIcfg [2022-02-23 18:09:00,264 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 18:09:00,265 INFO L158 Benchmark]: Toolchain (without parser) took 11398.48ms. Allocated memory was 176.2MB in the beginning and 315.6MB in the end (delta: 139.5MB). Free memory was 119.7MB in the beginning and 176.2MB in the end (delta: -56.5MB). Peak memory consumption was 84.3MB. Max. memory is 8.0GB. [2022-02-23 18:09:00,265 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 135.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 18:09:00,265 INFO L158 Benchmark]: CACSL2BoogieTranslator took 209.11ms. Allocated memory was 176.2MB in the beginning and 261.1MB in the end (delta: 84.9MB). Free memory was 119.5MB in the beginning and 231.9MB in the end (delta: -112.4MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-02-23 18:09:00,265 INFO L158 Benchmark]: Boogie Preprocessor took 17.85ms. Allocated memory is still 261.1MB. Free memory was 231.9MB in the beginning and 230.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 18:09:00,265 INFO L158 Benchmark]: RCFGBuilder took 238.93ms. Allocated memory is still 261.1MB. Free memory was 230.3MB in the beginning and 218.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 18:09:00,266 INFO L158 Benchmark]: IcfgTransformer took 17.73ms. Allocated memory is still 261.1MB. Free memory was 218.2MB in the beginning and 216.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 18:09:00,266 INFO L158 Benchmark]: TraceAbstraction took 10911.10ms. Allocated memory was 261.1MB in the beginning and 315.6MB in the end (delta: 54.5MB). Free memory was 216.2MB in the beginning and 176.2MB in the end (delta: 40.0MB). Peak memory consumption was 95.6MB. Max. memory is 8.0GB. [2022-02-23 18:09:00,267 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 135.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 209.11ms. Allocated memory was 176.2MB in the beginning and 261.1MB in the end (delta: 84.9MB). Free memory was 119.5MB in the beginning and 231.9MB in the end (delta: -112.4MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.85ms. Allocated memory is still 261.1MB. Free memory was 231.9MB in the beginning and 230.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 238.93ms. Allocated memory is still 261.1MB. Free memory was 230.3MB in the beginning and 218.2MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 17.73ms. Allocated memory is still 261.1MB. Free memory was 218.2MB in the beginning and 216.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 10911.10ms. Allocated memory was 261.1MB in the beginning and 315.6MB in the end (delta: 54.5MB). Free memory was 216.2MB in the beginning and 176.2MB in the end (delta: 40.0MB). Peak memory consumption was 95.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.9s, OverallIterations: 11, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 371 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 316 mSDsluCounter, 2656 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2218 mSDsCounter, 409 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1663 IncrementalHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 409 mSolverCounterUnsat, 438 mSDtfsCounter, 1663 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1351 GetRequests, 1181 SyntacticMatches, 8 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=7, InterpolantAutomatonStates: 110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 27 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 763 NumberOfCodeBlocks, 763 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 1300 ConstructedInterpolants, 0 QuantifiedInterpolants, 4399 SizeOfPredicates, 54 NumberOfNonLiveVariables, 1922 ConjunctsInSsa, 195 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 2678/2998 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-02-23 18:09:00,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...