/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_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 18:28:10,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 18:28:10,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 18:28:11,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 18:28:11,018 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 18:28:11,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 18:28:11,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 18:28:11,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 18:28:11,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 18:28:11,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 18:28:11,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 18:28:11,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 18:28:11,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 18:28:11,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 18:28:11,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 18:28:11,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 18:28:11,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 18:28:11,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 18:28:11,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 18:28:11,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 18:28:11,047 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 18:28:11,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 18:28:11,049 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 18:28:11,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 18:28:11,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 18:28:11,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 18:28:11,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-18 18:28:11,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-18 18:28:11,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-18 18:28:11,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-18 18:28:11,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-18 18:28:11,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-18 18:28:11,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-18 18:28:11,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-18 18:28:11,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 18:28:11,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 18:28:11,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 18:28:11,065 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 18:28:11,074 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 18:28:11,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 18:28:11,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 18:28:11,075 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 18:28:11,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 18:28:11,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 18:28:11,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 18:28:11,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 18:28:11,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 18:28:11,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 18:28:11,076 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 18:28:11,076 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 18:28:11,077 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 18:28:11,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 18:28:11,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 18:28:11,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 18:28:11,077 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 18:28:11,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 18:28:11,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:28:11,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 18:28:11,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 18:28:11,078 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 18:28:11,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 18:28:11,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 18:28:11,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 18:28:11,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 18:28:11,271 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 18:28:11,272 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 18:28:11,272 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c [2022-03-18 18:28:11,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867990674/130fb5a631b144eaa0b2c4e8879fc3a4/FLAGeaaf35713 [2022-03-18 18:28:11,652 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 18:28:11,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_valuebound2.c [2022-03-18 18:28:11,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867990674/130fb5a631b144eaa0b2c4e8879fc3a4/FLAGeaaf35713 [2022-03-18 18:28:11,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/867990674/130fb5a631b144eaa0b2c4e8879fc3a4 [2022-03-18 18:28:11,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 18:28:11,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 18:28:11,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 18:28:11,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 18:28:11,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 18:28:11,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff0de86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11, skipping insertion in model container [2022-03-18 18:28:11,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 18:28:11,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 18:28:11,812 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_valuebound2.c[597,610] [2022-03-18 18:28:11,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:28:11,848 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 18:28:11,857 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_valuebound2.c[597,610] [2022-03-18 18:28:11,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:28:11,884 INFO L208 MainTranslator]: Completed translation [2022-03-18 18:28:11,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11 WrapperNode [2022-03-18 18:28:11,884 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 18:28:11,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 18:28:11,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 18:28:11,885 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 18:28:11,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,933 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 18:28:11,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 18:28:11,933 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 18:28:11,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 18:28:11,934 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (1/1) ... [2022-03-18 18:28:11,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:28:11,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:28:11,958 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) [2022-03-18 18:28:11,987 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 [2022-03-18 18:28:12,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 18:28:12,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 18:28:12,004 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 18:28:12,004 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 18:28:12,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 18:28:12,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 18:28:12,004 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 18:28:12,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 18:28:12,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 18:28:12,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 18:28:12,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 18:28:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 18:28:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 18:28:12,006 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 18:28:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 18:28:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 18:28:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 18:28:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 18:28:12,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 18:28:12,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 18:28:12,055 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 18:28:12,056 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 18:28:12,192 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 18:28:12,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 18:28:12,201 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 18:28:12,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:28:12 BoogieIcfgContainer [2022-03-18 18:28:12,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 18:28:12,202 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 18:28:12,203 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 18:28:12,203 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 18:28:12,205 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:28:12" (1/1) ... [2022-03-18 18:28:12,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:28:12 BasicIcfg [2022-03-18 18:28:12,216 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 18:28:12,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 18:28:12,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 18:28:12,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 18:28:12,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 06:28:11" (1/4) ... [2022-03-18 18:28:12,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37943add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:28:12, skipping insertion in model container [2022-03-18 18:28:12,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:28:11" (2/4) ... [2022-03-18 18:28:12,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37943add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:28:12, skipping insertion in model container [2022-03-18 18:28:12,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:28:12" (3/4) ... [2022-03-18 18:28:12,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37943add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 06:28:12, skipping insertion in model container [2022-03-18 18:28:12,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:28:12" (4/4) ... [2022-03-18 18:28:12,220 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.cJordan [2022-03-18 18:28:12,223 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 18:28:12,223 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 18:28:12,262 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 18:28:12,266 INFO L340 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 [2022-03-18 18:28:12,266 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 18:28:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 18:28:12,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 18:28:12,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:28:12,297 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:28:12,297 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:28:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:28:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1563578423, now seen corresponding path program 1 times [2022-03-18 18:28:12,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:28:12,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243224195] [2022-03-18 18:28:12,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:28:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:12,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:28:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:12,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 18:28:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:12,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 18:28:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:28:12,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:28:12,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243224195] [2022-03-18 18:28:12,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243224195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:28:12,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:28:12,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 18:28:12,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394738091] [2022-03-18 18:28:12,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:28:12,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 18:28:12,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:28:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 18:28:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:28:12,507 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 18:28:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:28:12,552 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-03-18 18:28:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 18:28:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 18:28:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:28:12,559 INFO L225 Difference]: With dead ends: 32 [2022-03-18 18:28:12,559 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 18:28:12,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:28:12,566 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:28:12,567 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:28:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 18:28:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 18:28:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 18:28:12,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-18 18:28:12,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-18 18:28:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:28:12,603 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-18 18:28:12,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 18:28:12,604 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-18 18:28:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 18:28:12,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:28:12,605 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:28:12,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 18:28:12,605 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:28:12,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:28:12,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1863481077, now seen corresponding path program 1 times [2022-03-18 18:28:12,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:28:12,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82850753] [2022-03-18 18:28:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:12,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:28:12,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:28:12,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894256104] [2022-03-18 18:28:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:12,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:12,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:28:12,640 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) [2022-03-18 18:28:12,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 18:28:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:12,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 18:28:12,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:28:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:28:12,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 18:28:12,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:28:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82850753] [2022-03-18 18:28:12,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:28:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894256104] [2022-03-18 18:28:12,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894256104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:28:12,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:28:12,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 18:28:12,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599329241] [2022-03-18 18:28:12,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:28:12,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:28:12,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:28:12,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:28:12,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:28:12,815 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 18:28:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:28:12,891 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-03-18 18:28:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:28:12,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-18 18:28:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:28:12,894 INFO L225 Difference]: With dead ends: 37 [2022-03-18 18:28:12,895 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 18:28:12,895 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:28:12,896 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:28:12,896 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 101 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:28:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 18:28:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-18 18:28:12,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 18:28:12,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-03-18 18:28:12,900 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2022-03-18 18:28:12,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:28:12,900 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-03-18 18:28:12,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 18:28:12,901 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-03-18 18:28:12,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 18:28:12,901 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:28:12,901 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:28:12,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 18:28:13,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:13,124 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:28:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:28:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash -646008129, now seen corresponding path program 1 times [2022-03-18 18:28:13,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:28:13,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584102683] [2022-03-18 18:28:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:13,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:28:13,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:28:13,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22220875] [2022-03-18 18:28:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:13,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:13,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:28:13,146 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) [2022-03-18 18:28:13,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 18:28:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 18:28:13,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:28:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:28:13,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:28:13,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:28:13,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584102683] [2022-03-18 18:28:13,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:28:13,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22220875] [2022-03-18 18:28:13,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22220875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:28:13,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 18:28:13,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 18:28:13,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244341368] [2022-03-18 18:28:13,543 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 18:28:13,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 18:28:13,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:28:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 18:28:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-18 18:28:13,544 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 18:28:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:28:13,643 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-03-18 18:28:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 18:28:13,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-18 18:28:13,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:28:13,644 INFO L225 Difference]: With dead ends: 48 [2022-03-18 18:28:13,644 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 18:28:13,644 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-03-18 18:28:13,645 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:28:13,645 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 141 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:28:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 18:28:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-18 18:28:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 18:28:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-18 18:28:13,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2022-03-18 18:28:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:28:13,649 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-18 18:28:13,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 18:28:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-18 18:28:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 18:28:13,649 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:28:13,650 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:28:13,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 18:28:13,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 18:28:13,866 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:28:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:28:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash 241495552, now seen corresponding path program 1 times [2022-03-18 18:28:13,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:28:13,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754775659] [2022-03-18 18:28:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:13,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:28:13,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:28:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337594050] [2022-03-18 18:28:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:13,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:13,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:28:13,895 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) [2022-03-18 18:28:13,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 18:28:13,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 18:28:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:28:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:28:14,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:28:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 18:28:14,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:28:14,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754775659] [2022-03-18 18:28:14,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:28:14,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337594050] [2022-03-18 18:28:14,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337594050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:28:14,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:28:14,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2022-03-18 18:28:14,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621881232] [2022-03-18 18:28:14,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:28:14,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 18:28:14,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:28:14,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 18:28:14,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-18 18:28:14,209 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 18:28:14,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:28:14,482 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-03-18 18:28:14,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 18:28:14,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-03-18 18:28:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:28:14,486 INFO L225 Difference]: With dead ends: 46 [2022-03-18 18:28:14,486 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 18:28:14,486 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-03-18 18:28:14,487 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 18:28:14,487 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 18:28:14,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 18:28:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 18:28:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 18:28:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-18 18:28:14,491 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2022-03-18 18:28:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:28:14,491 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-18 18:28:14,491 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-03-18 18:28:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-18 18:28:14,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 18:28:14,492 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:28:14,492 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:28:14,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-18 18:28:14,719 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:14,720 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:28:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:28:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1661983408, now seen corresponding path program 1 times [2022-03-18 18:28:14,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:28:14,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397592289] [2022-03-18 18:28:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:14,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:28:14,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:28:14,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364396752] [2022-03-18 18:28:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:14,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:14,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:28:14,739 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) [2022-03-18 18:28:14,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 18:28:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 18:28:14,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:28:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 18:28:15,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:28:15,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 18:28:15,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:28:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397592289] [2022-03-18 18:28:15,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:28:15,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364396752] [2022-03-18 18:28:15,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364396752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:28:15,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:28:15,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-18 18:28:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568868991] [2022-03-18 18:28:15,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:28:15,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 18:28:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:28:15,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 18:28:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-18 18:28:15,353 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 18:28:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:28:15,707 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-03-18 18:28:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 18:28:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 39 [2022-03-18 18:28:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:28:15,708 INFO L225 Difference]: With dead ends: 54 [2022-03-18 18:28:15,708 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 18:28:15,708 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 18:28:15,709 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:28:15,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 226 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 142 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-03-18 18:28:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 18:28:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-03-18 18:28:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 18:28:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-18 18:28:15,713 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 39 [2022-03-18 18:28:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:28:15,713 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-18 18:28:15,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 19 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 18:28:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-18 18:28:15,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 18:28:15,714 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:28:15,714 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:28:15,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 18:28:15,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:15,923 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:28:15,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:28:15,924 INFO L85 PathProgramCache]: Analyzing trace with hash 494880272, now seen corresponding path program 1 times [2022-03-18 18:28:15,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:28:15,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939774007] [2022-03-18 18:28:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:15,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:28:15,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:28:15,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377019579] [2022-03-18 18:28:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:15,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:15,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:28:15,934 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) [2022-03-18 18:28:15,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 18:28:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:28:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 18:28:15,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:28:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 18:28:16,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:28:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 18:28:16,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:28:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939774007] [2022-03-18 18:28:16,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:28:16,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377019579] [2022-03-18 18:28:16,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377019579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:28:16,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:28:16,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-03-18 18:28:16,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373456160] [2022-03-18 18:28:16,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:28:16,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 18:28:16,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:28:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 18:28:16,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-18 18:28:16,207 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-03-18 18:28:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:28:16,259 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-03-18 18:28:16,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 18:28:16,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 57 [2022-03-18 18:28:16,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:28:16,260 INFO L225 Difference]: With dead ends: 62 [2022-03-18 18:28:16,260 INFO L226 Difference]: Without dead ends: 62 [2022-03-18 18:28:16,260 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:28:16,261 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:28:16,261 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 130 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:28:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-18 18:28:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-03-18 18:28:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 18:28:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-03-18 18:28:16,269 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 57 [2022-03-18 18:28:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:28:16,269 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-03-18 18:28:16,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-03-18 18:28:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-03-18 18:28:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 18:28:16,272 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:28:16,272 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:28:16,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 18:28:16,473 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:16,473 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:28:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:28:16,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1739644753, now seen corresponding path program 2 times [2022-03-18 18:28:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:28:16,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976646999] [2022-03-18 18:28:16,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:16,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:28:16,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:28:16,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122537811] [2022-03-18 18:28:16,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 18:28:16,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:16,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:28:16,507 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) [2022-03-18 18:28:16,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 18:28:16,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 18:28:16,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:28:16,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 18:28:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:28:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 18:28:16,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:28:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 18:28:16,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:28:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976646999] [2022-03-18 18:28:16,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:28:16,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122537811] [2022-03-18 18:28:16,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122537811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:28:16,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:28:16,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-18 18:28:16,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842518174] [2022-03-18 18:28:16,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:28:16,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 18:28:16,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:28:16,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 18:28:16,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-18 18:28:16,994 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-18 18:28:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:28:17,333 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2022-03-18 18:28:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 18:28:17,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 57 [2022-03-18 18:28:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:28:17,334 INFO L225 Difference]: With dead ends: 74 [2022-03-18 18:28:17,334 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 18:28:17,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-03-18 18:28:17,335 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:28:17,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 233 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:28:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 18:28:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2022-03-18 18:28:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 18:28:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-18 18:28:17,339 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 57 [2022-03-18 18:28:17,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:28:17,340 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-18 18:28:17,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 10 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-03-18 18:28:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-18 18:28:17,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-18 18:28:17,340 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:28:17,340 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:28:17,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 18:28:17,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:17,541 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:28:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:28:17,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1468958503, now seen corresponding path program 3 times [2022-03-18 18:28:17,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:28:17,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367913412] [2022-03-18 18:28:17,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:28:17,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:28:17,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 18:28:17,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475603610] [2022-03-18 18:28:17,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 18:28:17,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:17,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:28:17,551 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) [2022-03-18 18:28:17,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 18:28:17,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 18:28:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:28:17,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 18:28:17,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:28:18,348 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 18:28:18,352 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 18:28:18,355 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 18:28:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 18:28:22,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:28:22,977 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 18:28:23,925 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 18:28:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 18:28:35,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:28:35,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367913412] [2022-03-18 18:28:35,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 18:28:35,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475603610] [2022-03-18 18:28:35,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475603610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:28:35,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 18:28:35,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 25 [2022-03-18 18:28:35,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778213861] [2022-03-18 18:28:35,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 18:28:35,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 18:28:35,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:28:35,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 18:28:35,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=498, Unknown=4, NotChecked=0, Total=600 [2022-03-18 18:28:35,934 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-18 18:28:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:28:48,285 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-03-18 18:28:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 18:28:48,286 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 66 [2022-03-18 18:28:48,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:28:48,286 INFO L225 Difference]: With dead ends: 65 [2022-03-18 18:28:48,286 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 18:28:48,287 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=242, Invalid=1086, Unknown=4, NotChecked=0, Total=1332 [2022-03-18 18:28:48,287 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-18 18:28:48,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 229 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 256 Invalid, 0 Unknown, 48 Unchecked, 2.3s Time] [2022-03-18 18:28:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 18:28:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 18:28:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 18:28:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 18:28:48,288 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2022-03-18 18:28:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:28:48,288 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 18:28:48,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 22 states have internal predecessors, (46), 7 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-03-18 18:28:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 18:28:48,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 18:28:48,291 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 18:28:48,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 18:28:48,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:28:48,502 INFO L718 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-03-18 18:28:48,503 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 18:28:48,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 06:28:48 BasicIcfg [2022-03-18 18:28:48,507 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 18:28:48,507 INFO L158 Benchmark]: Toolchain (without parser) took 36836.77ms. Allocated memory was 204.5MB in the beginning and 382.7MB in the end (delta: 178.3MB). Free memory was 149.7MB in the beginning and 195.2MB in the end (delta: -45.5MB). Peak memory consumption was 134.3MB. Max. memory is 8.0GB. [2022-03-18 18:28:48,507 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 204.5MB. Free memory was 165.9MB in the beginning and 165.9MB in the end (delta: 76.2kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 18:28:48,507 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.69ms. Allocated memory was 204.5MB in the beginning and 274.7MB in the end (delta: 70.3MB). Free memory was 149.5MB in the beginning and 245.3MB in the end (delta: -95.8MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. [2022-03-18 18:28:48,507 INFO L158 Benchmark]: Boogie Preprocessor took 47.79ms. Allocated memory is still 274.7MB. Free memory was 245.3MB in the beginning and 243.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 18:28:48,508 INFO L158 Benchmark]: RCFGBuilder took 268.63ms. Allocated memory is still 274.7MB. Free memory was 243.8MB in the beginning and 233.1MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 18:28:48,508 INFO L158 Benchmark]: IcfgTransformer took 13.20ms. Allocated memory is still 274.7MB. Free memory was 233.1MB in the beginning and 231.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 18:28:48,508 INFO L158 Benchmark]: TraceAbstraction took 36289.89ms. Allocated memory was 274.7MB in the beginning and 382.7MB in the end (delta: 108.0MB). Free memory was 231.3MB in the beginning and 195.2MB in the end (delta: 36.1MB). Peak memory consumption was 144.9MB. Max. memory is 8.0GB. [2022-03-18 18:28:48,509 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 204.5MB. Free memory was 165.9MB in the beginning and 165.9MB in the end (delta: 76.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 212.69ms. Allocated memory was 204.5MB in the beginning and 274.7MB in the end (delta: 70.3MB). Free memory was 149.5MB in the beginning and 245.3MB in the end (delta: -95.8MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 47.79ms. Allocated memory is still 274.7MB. Free memory was 245.3MB in the beginning and 243.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 268.63ms. Allocated memory is still 274.7MB. Free memory was 243.8MB in the beginning and 233.1MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 13.20ms. Allocated memory is still 274.7MB. Free memory was 233.1MB in the beginning and 231.7MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 36289.89ms. Allocated memory was 274.7MB in the beginning and 382.7MB in the end (delta: 108.0MB). Free memory was 231.3MB in the beginning and 195.2MB in the end (delta: 36.1MB). Peak memory consumption was 144.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 36.2s, OverallIterations: 8, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 13.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 176 SdHoareTripleChecker+Valid, 2.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 167 mSDsluCounter, 1262 SdHoareTripleChecker+Invalid, 2.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 90 IncrementalHoareTripleChecker+Unchecked, 1059 mSDsCounter, 104 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 995 IncrementalHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 104 mSolverCounterUnsat, 203 mSDtfsCounter, 995 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 474 SyntacticMatches, 8 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 23.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=7, InterpolantAutomatonStates: 104, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 25 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 20.4s InterpolantComputationTime, 329 NumberOfCodeBlocks, 302 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 567 ConstructedInterpolants, 6 QuantifiedInterpolants, 3338 SizeOfPredicates, 38 NumberOfNonLiveVariables, 844 ConjunctsInSsa, 131 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 409/494 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-18 18:28:48,724 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-03-18 18:28:48,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...