/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/bresenham-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 13:35:22,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 13:35:22,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 13:35:23,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 13:35:23,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 13:35:23,072 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 13:35:23,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 13:35:23,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 13:35:23,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 13:35:23,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 13:35:23,084 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 13:35:23,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 13:35:23,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 13:35:23,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 13:35:23,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 13:35:23,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 13:35:23,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 13:35:23,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 13:35:23,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 13:35:23,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 13:35:23,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 13:35:23,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 13:35:23,105 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 13:35:23,107 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 13:35:23,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 13:35:23,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 13:35:23,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 13:35:23,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 13:35:23,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 13:35:23,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 13:35:23,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 13:35:23,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 13:35:23,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 13:35:23,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 13:35:23,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 13:35:23,119 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 13:35:23,123 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-01-31 13:35:23,141 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 13:35:23,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 13:35:23,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 13:35:23,143 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 13:35:23,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 13:35:23,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 13:35:23,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 13:35:23,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 13:35:23,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 13:35:23,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 13:35:23,144 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 13:35:23,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 13:35:23,145 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 13:35:23,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 13:35:23,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 13:35:23,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 13:35:23,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 13:35:23,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 13:35:23,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:35:23,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 13:35:23,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 13:35:23,147 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-31 13:35:23,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 13:35:23,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 13:35:23,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 13:35:23,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 13:35:23,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 13:35:23,371 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 13:35:23,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-01-31 13:35:23,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69d4720a3/6a4578796de84c519920454d3c554a42/FLAG3c467ac99 [2022-01-31 13:35:23,860 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 13:35:23,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound5.c [2022-01-31 13:35:23,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69d4720a3/6a4578796de84c519920454d3c554a42/FLAG3c467ac99 [2022-01-31 13:35:24,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69d4720a3/6a4578796de84c519920454d3c554a42 [2022-01-31 13:35:24,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 13:35:24,277 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-31 13:35:24,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 13:35:24,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 13:35:24,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 13:35:24,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5a1cc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24, skipping insertion in model container [2022-01-31 13:35:24,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 13:35:24,300 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 13:35:24,453 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/bresenham-ll_unwindbound5.c[597,610] [2022-01-31 13:35:24,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:35:24,495 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 13:35:24,510 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/bresenham-ll_unwindbound5.c[597,610] [2022-01-31 13:35:24,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 13:35:24,544 INFO L208 MainTranslator]: Completed translation [2022-01-31 13:35:24,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24 WrapperNode [2022-01-31 13:35:24,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 13:35:24,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 13:35:24,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 13:35:24,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 13:35:24,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,562 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 13:35:24,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 13:35:24,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 13:35:24,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 13:35:24,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 13:35:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:24,625 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) [2022-01-31 13:35:24,648 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 [2022-01-31 13:35:24,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 13:35:24,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 13:35:24,669 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 13:35:24,669 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 13:35:24,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 13:35:24,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 13:35:24,670 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 13:35:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 13:35:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 13:35:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 13:35:24,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 13:35:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 13:35:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 13:35:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 13:35:24,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 13:35:24,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 13:35:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 13:35:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 13:35:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 13:35:24,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 13:35:24,739 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 13:35:24,740 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 13:35:24,918 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 13:35:24,923 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 13:35:24,923 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 13:35:24,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:35:24 BoogieIcfgContainer [2022-01-31 13:35:24,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 13:35:24,926 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-31 13:35:24,926 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-31 13:35:24,940 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-31 13:35:24,943 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:35:24" (1/1) ... [2022-01-31 13:35:24,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:35:24 BasicIcfg [2022-01-31 13:35:24,974 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-31 13:35:24,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 13:35:24,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 13:35:24,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 13:35:24,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:35:24" (1/4) ... [2022-01-31 13:35:24,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc69fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:35:24, skipping insertion in model container [2022-01-31 13:35:24,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:35:24" (2/4) ... [2022-01-31 13:35:24,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc69fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:35:24, skipping insertion in model container [2022-01-31 13:35:24,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:35:24" (3/4) ... [2022-01-31 13:35:24,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cc69fb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 01:35:24, skipping insertion in model container [2022-01-31 13:35:24,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 31.01 01:35:24" (4/4) ... [2022-01-31 13:35:24,981 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound5.cJordan [2022-01-31 13:35:24,985 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-01-31 13:35:24,986 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 13:35:25,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 13:35:25,057 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 [2022-01-31 13:35:25,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 13:35:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 13:35:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 13:35:25,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:25,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:25,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:25,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:25,093 INFO L85 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2022-01-31 13:35:25,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:25,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106935978] [2022-01-31 13:35:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:25,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:35:25,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 13:35:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:35:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:35:25,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:35:25,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106935978] [2022-01-31 13:35:25,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106935978] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:35:25,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:35:25,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 13:35:25,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079353867] [2022-01-31 13:35:25,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:35:25,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 13:35:25,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:35:25,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 13:35:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:35:25,343 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:35:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:35:25,401 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-01-31 13:35:25,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 13:35:25,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 13:35:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:35:25,411 INFO L225 Difference]: With dead ends: 26 [2022-01-31 13:35:25,411 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 13:35:25,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 13:35:25,419 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:35:25,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:35:25,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 13:35:25,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-01-31 13:35:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 13:35:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-31 13:35:25,460 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-01-31 13:35:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:35:25,461 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-31 13:35:25,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:35:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-31 13:35:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 13:35:25,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:25,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:25,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 13:35:25,464 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2022-01-31 13:35:25,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:25,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129395054] [2022-01-31 13:35:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:25,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:25,497 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:35:25,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280133509] [2022-01-31 13:35:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:25,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:35:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:25,507 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) [2022-01-31 13:35:25,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 13:35:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:35:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-31 13:35:25,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:35:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:35:25,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 13:35:25,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:35:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129395054] [2022-01-31 13:35:25,745 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:35:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280133509] [2022-01-31 13:35:25,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280133509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 13:35:25,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 13:35:25,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 13:35:25,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996770860] [2022-01-31 13:35:25,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 13:35:25,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 13:35:25,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:35:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 13:35:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 13:35:25,749 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:35:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:35:25,815 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-01-31 13:35:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 13:35:25,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 13:35:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:35:25,817 INFO L225 Difference]: With dead ends: 32 [2022-01-31 13:35:25,817 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 13:35:25,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:35:25,819 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:35:25,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:35:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 13:35:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-01-31 13:35:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 13:35:25,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-31 13:35:25,840 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-01-31 13:35:25,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:35:25,841 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-31 13:35:25,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 13:35:25,841 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-31 13:35:25,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 13:35:25,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:25,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:25,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 13:35:26,043 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 [2022-01-31 13:35:26,043 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:26,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:26,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2022-01-31 13:35:26,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:26,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109294461] [2022-01-31 13:35:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:26,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:26,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:35:26,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428887898] [2022-01-31 13:35:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:26,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:35:26,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:26,064 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) [2022-01-31 13:35:26,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 13:35:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:35:26,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-31 13:35:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:35:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:35:26,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:35:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 13:35:26,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:35:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109294461] [2022-01-31 13:35:26,582 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:35:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428887898] [2022-01-31 13:35:26,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428887898] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:35:26,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:35:26,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-01-31 13:35:26,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856842110] [2022-01-31 13:35:26,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:35:26,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 13:35:26,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:35:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 13:35:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:35:26,587 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 13:35:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:35:26,852 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-01-31 13:35:26,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 13:35:26,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2022-01-31 13:35:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:35:26,854 INFO L225 Difference]: With dead ends: 43 [2022-01-31 13:35:26,854 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 13:35:26,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-31 13:35:26,856 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:35:26,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 121 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 13:35:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 13:35:26,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-01-31 13:35:26,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 13:35:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-01-31 13:35:26,863 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 22 [2022-01-31 13:35:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:35:26,863 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-01-31 13:35:26,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 13:35:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-01-31 13:35:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 13:35:26,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:26,865 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:26,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 13:35:27,093 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 [2022-01-31 13:35:27,094 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:27,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2022-01-31 13:35:27,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:27,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012017777] [2022-01-31 13:35:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:27,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:27,107 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:35:27,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059297840] [2022-01-31 13:35:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:27,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:35:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:27,111 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) [2022-01-31 13:35:27,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 13:35:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:35:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 13:35:27,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:35:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:35:27,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:35:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 13:35:27,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:35:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012017777] [2022-01-31 13:35:27,275 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:35:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059297840] [2022-01-31 13:35:27,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059297840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:35:27,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:35:27,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-31 13:35:27,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499633244] [2022-01-31 13:35:27,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:35:27,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 13:35:27,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:35:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 13:35:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 13:35:27,277 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 13:35:27,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:35:27,330 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-01-31 13:35:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 13:35:27,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-01-31 13:35:27,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:35:27,332 INFO L225 Difference]: With dead ends: 71 [2022-01-31 13:35:27,333 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 13:35:27,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-31 13:35:27,334 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 13:35:27,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 119 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 13:35:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 13:35:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-01-31 13:35:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 13:35:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-01-31 13:35:27,341 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-01-31 13:35:27,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:35:27,341 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-01-31 13:35:27,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 13:35:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-01-31 13:35:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 13:35:27,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:27,342 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:27,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 13:35:27,566 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 [2022-01-31 13:35:27,567 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:27,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:27,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2036751370, now seen corresponding path program 1 times [2022-01-31 13:35:27,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:27,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176059565] [2022-01-31 13:35:27,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:27,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:27,580 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:35:27,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889043907] [2022-01-31 13:35:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:27,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:35:27,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:27,582 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) [2022-01-31 13:35:27,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 13:35:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:35:27,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-31 13:35:27,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:35:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 13:35:28,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:35:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 13:35:28,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:35:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176059565] [2022-01-31 13:35:28,527 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:35:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889043907] [2022-01-31 13:35:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889043907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:35:28,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:35:28,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-01-31 13:35:28,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097954985] [2022-01-31 13:35:28,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:35:28,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 13:35:28,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:35:28,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 13:35:28,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-31 13:35:28,530 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 13:35:29,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:35:29,169 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-01-31 13:35:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 13:35:29,171 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-01-31 13:35:29,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:35:29,172 INFO L225 Difference]: With dead ends: 82 [2022-01-31 13:35:29,172 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 13:35:29,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 13:35:29,173 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:35:29,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 241 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 255 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-01-31 13:35:29,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 13:35:29,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-01-31 13:35:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 13:35:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-01-31 13:35:29,181 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-01-31 13:35:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:35:29,181 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-01-31 13:35:29,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 19 states have internal predecessors, (33), 6 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 13:35:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-01-31 13:35:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 13:35:29,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:29,183 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:29,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 13:35:29,407 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 [2022-01-31 13:35:29,408 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:29,408 INFO L85 PathProgramCache]: Analyzing trace with hash -782335822, now seen corresponding path program 1 times [2022-01-31 13:35:29,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:29,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744977552] [2022-01-31 13:35:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:29,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:29,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:35:29,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140845130] [2022-01-31 13:35:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:29,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:35:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:29,421 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) [2022-01-31 13:35:29,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 13:35:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:35:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-31 13:35:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:35:29,659 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 13:35:29,662 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 13:35:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 13:35:32,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:35:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 13:35:32,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:35:32,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744977552] [2022-01-31 13:35:32,486 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:35:32,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140845130] [2022-01-31 13:35:32,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140845130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:35:32,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:35:32,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-01-31 13:35:32,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672135525] [2022-01-31 13:35:32,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:35:32,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 13:35:32,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:35:32,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 13:35:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=247, Unknown=1, NotChecked=0, Total=306 [2022-01-31 13:35:32,488 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 13:35:34,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:35:38,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:35:40,736 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-31 13:35:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:35:43,029 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2022-01-31 13:35:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 13:35:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 39 [2022-01-31 13:35:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:35:43,030 INFO L225 Difference]: With dead ends: 94 [2022-01-31 13:35:43,030 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 13:35:43,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=117, Invalid=432, Unknown=3, NotChecked=0, Total=552 [2022-01-31 13:35:43,032 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-01-31 13:35:43,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 153 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 159 Invalid, 3 Unknown, 0 Unchecked, 6.2s Time] [2022-01-31 13:35:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 13:35:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-01-31 13:35:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 states have internal predecessors, (82), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 13:35:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2022-01-31 13:35:43,041 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 39 [2022-01-31 13:35:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:35:43,041 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2022-01-31 13:35:43,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 12 states have (on average 2.5) internal successors, (30), 17 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 13:35:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2022-01-31 13:35:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 13:35:43,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:43,043 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:43,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 13:35:43,259 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 [2022-01-31 13:35:43,259 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1435422131, now seen corresponding path program 1 times [2022-01-31 13:35:43,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:43,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322550165] [2022-01-31 13:35:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:43,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:43,268 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:35:43,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011187617] [2022-01-31 13:35:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:43,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:35:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:43,270 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) [2022-01-31 13:35:43,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 13:35:43,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 13:35:43,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:35:43,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:35:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 13:35:43,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:35:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 13:35:43,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:35:43,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322550165] [2022-01-31 13:35:43,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:35:43,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011187617] [2022-01-31 13:35:43,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011187617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:35:43,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:35:43,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-31 13:35:43,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142050254] [2022-01-31 13:35:43,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:35:43,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 13:35:43,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:35:43,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 13:35:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-01-31 13:35:43,744 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 13:35:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:35:43,896 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-01-31 13:35:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 13:35:43,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 39 [2022-01-31 13:35:43,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:35:43,899 INFO L225 Difference]: With dead ends: 91 [2022-01-31 13:35:43,899 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 13:35:43,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-31 13:35:43,900 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:35:43,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:35:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 13:35:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2022-01-31 13:35:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 66 states have internal predecessors, (77), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 13:35:43,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-01-31 13:35:43,907 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 39 [2022-01-31 13:35:43,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:35:43,907 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-01-31 13:35:43,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 13:35:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-01-31 13:35:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 13:35:43,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:43,909 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:43,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 13:35:44,115 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 [2022-01-31 13:35:44,116 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1628716144, now seen corresponding path program 2 times [2022-01-31 13:35:44,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121455673] [2022-01-31 13:35:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:44,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:44,125 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:35:44,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996451902] [2022-01-31 13:35:44,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 13:35:44,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:35:44,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:44,132 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) [2022-01-31 13:35:44,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 13:35:44,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 13:35:44,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:35:44,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-31 13:35:44,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:35:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:35:44,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 13:35:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 13:35:44,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 13:35:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121455673] [2022-01-31 13:35:44,608 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 13:35:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996451902] [2022-01-31 13:35:44,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996451902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 13:35:44,608 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 13:35:44,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-31 13:35:44,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223724892] [2022-01-31 13:35:44,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 13:35:44,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 13:35:44,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 13:35:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 13:35:44,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-31 13:35:44,610 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 13:35:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 13:35:44,778 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-01-31 13:35:44,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 13:35:44,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 49 [2022-01-31 13:35:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 13:35:44,780 INFO L225 Difference]: With dead ends: 102 [2022-01-31 13:35:44,780 INFO L226 Difference]: Without dead ends: 102 [2022-01-31 13:35:44,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-31 13:35:44,781 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 13:35:44,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 179 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 13:35:44,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-31 13:35:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 89. [2022-01-31 13:35:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1690140845070423) internal successors, (83), 71 states have internal predecessors, (83), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 13:35:44,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2022-01-31 13:35:44,788 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 49 [2022-01-31 13:35:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 13:35:44,788 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2022-01-31 13:35:44,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 13:35:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2022-01-31 13:35:44,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 13:35:44,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 13:35:44,790 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 13:35:44,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 13:35:44,995 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 [2022-01-31 13:35:44,996 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 13:35:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 13:35:44,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1136439088, now seen corresponding path program 3 times [2022-01-31 13:35:44,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 13:35:44,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300831402] [2022-01-31 13:35:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 13:35:44,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 13:35:45,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 13:35:45,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029587441] [2022-01-31 13:35:45,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 13:35:45,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 13:35:45,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 13:35:45,006 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) [2022-01-31 13:35:45,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 13:35:45,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-31 13:35:45,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 13:35:45,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-31 13:35:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 13:35:45,810 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 13:35:45,814 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 13:35:45,816 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-01-31 13:35:51,921 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) is different from false