/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/loops-crafted-1/nested3-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:27:29,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:27:29,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:27:29,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 21:27:29,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 21:27:29,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 21:27:29,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 21:27:29,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 21:27:29,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 21:27:29,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 21:27:29,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 21:27:29,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 21:27:29,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 21:27:29,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 21:27:29,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 21:27:29,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 21:27:29,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 21:27:29,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:27:29,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:27:29,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:27:29,243 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:27:29,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:27:29,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:27:29,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:27:29,250 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:27:29,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:27:29,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:27:29,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:27:29,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:27:29,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:27:29,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:27:29,251 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:27:29,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:27:29,251 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:27:29,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:27:29,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:27:29,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:27:29,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:27:29,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:27:29,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:27:29,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:27:29,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:27:29,252 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:27:29,252 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:27:29,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:27:29,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:27:29,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:27:29,461 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:27:29,461 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:27:29,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2022-02-14 21:27:29,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19623c16/46727b3dca38488094fa60c83341b3a8/FLAGbb42b20a5 [2022-02-14 21:27:29,836 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:27:29,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c [2022-02-14 21:27:29,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19623c16/46727b3dca38488094fa60c83341b3a8/FLAGbb42b20a5 [2022-02-14 21:27:29,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f19623c16/46727b3dca38488094fa60c83341b3a8 [2022-02-14 21:27:29,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:27:29,872 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:27:29,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:27:29,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:27:29,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:27:29,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:27:29" (1/1) ... [2022-02-14 21:27:29,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@610f148 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:29, skipping insertion in model container [2022-02-14 21:27:29,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:27:29" (1/1) ... [2022-02-14 21:27:29,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:27:29,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:27:30,033 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2022-02-14 21:27:30,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:27:30,061 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:27:30,072 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-2.c[321,334] [2022-02-14 21:27:30,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:27:30,090 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:27:30,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30 WrapperNode [2022-02-14 21:27:30,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:27:30,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:27:30,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:27:30,093 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:27:30,100 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:27:30,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:27:30,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:27:30,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:27:30,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:27:30,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:27:30,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 21:27:30,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:27:30,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:27:30,179 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:27:30,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:27:30,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:27:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:27:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:27:30,179 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:27:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:27:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:27:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:27:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:27:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:27:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:27:30,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:27:30,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:27:30,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:27:30,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 21:27:30,233 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:27:30,235 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:27:30,327 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:27:30,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:27:30,330 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-14 21:27:30,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:27:30 BoogieIcfgContainer [2022-02-14 21:27:30,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:27:30,332 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:27:30,332 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:27:30,333 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:27:30,335 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:27:30" (1/1) ... [2022-02-14 21:27:30,490 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-14 21:27:30,491 INFO L91 elerationTransformer]: Accelerated Formula: (and (< (mod v_main_~z~0_3 4294967296) 268435455) (= (+ v_main_~z~0_3 1) v_main_~z~0_2)) InVars {main_~z~0=v_main_~z~0_3} OutVars{main_~z~0=v_main_~z~0_2, main_#t~post4=|v_main_#t~post4_1|} AuxVars[] AssignedVars[main_~z~0, main_#t~post4] to Formula: (let ((.cse0 (mod v_main_~z~0_3 4294967296))) (or (and (= v_main_~z~0_3 v_main_~z~0_2) (= |v_main_#t~post4_3| |v_main_#t~post4_1|) (<= 268435455 .cse0)) (and (<= (div (+ (* (- 1) v_main_~z~0_2) 268435455) (- 4294967296)) (+ (div (+ v_main_~z~0_3 (- 4294967295)) 4294967296) 1)) (< .cse0 268435455) (< v_main_~z~0_3 v_main_~z~0_2)))) InVars {main_#t~post4=|v_main_#t~post4_3|, main_~z~0=v_main_~z~0_3} OutVars{main_#t~post4=|v_main_#t~post4_1|, main_~z~0=v_main_~z~0_2} AuxVars[] AssignedVars[main_~z~0, main_#t~post4] [2022-02-14 21:27:30,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:27:30 BasicIcfg [2022-02-14 21:27:30,494 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:27:30,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:27:30,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:27:30,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:27:30,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:27:29" (1/4) ... [2022-02-14 21:27:30,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736d723f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:27:30, skipping insertion in model container [2022-02-14 21:27:30,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:27:30" (2/4) ... [2022-02-14 21:27:30,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736d723f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:27:30, skipping insertion in model container [2022-02-14 21:27:30,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:27:30" (3/4) ... [2022-02-14 21:27:30,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@736d723f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:27:30, skipping insertion in model container [2022-02-14 21:27:30,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:27:30" (4/4) ... [2022-02-14 21:27:30,499 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-2.cJordan [2022-02-14 21:27:30,516 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:27:30,516 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:27:30,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:27:30,555 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 21:27:30,555 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:27:30,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-14 21:27:30,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:27:30,569 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:27:30,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:27:30,570 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:27:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:27:30,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1301415802, now seen corresponding path program 1 times [2022-02-14 21:27:30,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:27:30,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923769425] [2022-02-14 21:27:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:27:30,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:27:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:27:30,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:27:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:27:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:27:30,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:27:30,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923769425] [2022-02-14 21:27:30,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923769425] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:27:30,709 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:27:30,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 21:27:30,710 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299513775] [2022-02-14 21:27:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:27:30,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 21:27:30,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:27:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 21:27:30,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:27:30,738 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:27:30,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:27:30,778 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-02-14 21:27:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 21:27:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-14 21:27:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:27:30,785 INFO L225 Difference]: With dead ends: 25 [2022-02-14 21:27:30,785 INFO L226 Difference]: Without dead ends: 20 [2022-02-14 21:27:30,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:27:30,790 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:27:30,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:27:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-14 21:27:30,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-14 21:27:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:27:30,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-02-14 21:27:30,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-02-14 21:27:30,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:27:30,816 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-02-14 21:27:30,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:27:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-02-14 21:27:30,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:27:30,818 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:27:30,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:27:30,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:27:30,819 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:27:30,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:27:30,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1302339323, now seen corresponding path program 1 times [2022-02-14 21:27:30,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:27:30,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861718659] [2022-02-14 21:27:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:27:30,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:27:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:27:30,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:27:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:27:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:27:30,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:27:30,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861718659] [2022-02-14 21:27:30,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861718659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:27:30,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:27:30,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:27:30,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090811819] [2022-02-14 21:27:30,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:27:30,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:27:30,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:27:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:27:30,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:27:30,936 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:27:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:27:30,996 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2022-02-14 21:27:30,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:27:30,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-14 21:27:30,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:27:30,998 INFO L225 Difference]: With dead ends: 27 [2022-02-14 21:27:30,998 INFO L226 Difference]: Without dead ends: 27 [2022-02-14 21:27:30,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:27:31,000 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:27:31,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:27:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-14 21:27:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-02-14 21:27:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:27:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-02-14 21:27:31,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-02-14 21:27:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:27:31,009 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-02-14 21:27:31,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:27:31,010 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-02-14 21:27:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-14 21:27:31,011 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:27:31,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:27:31,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 21:27:31,018 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:27:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:27:31,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1748313539, now seen corresponding path program 1 times [2022-02-14 21:27:31,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:27:31,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604662713] [2022-02-14 21:27:31,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:27:31,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:27:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:27:31,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:27:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:27:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:27:31,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:27:31,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604662713] [2022-02-14 21:27:31,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604662713] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:27:31,087 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:27:31,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:27:31,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472627215] [2022-02-14 21:27:31,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:27:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:27:31,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:27:31,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:27:31,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:27:31,088 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:27:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:27:31,133 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-02-14 21:27:31,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:27:31,133 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-14 21:27:31,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:27:31,134 INFO L225 Difference]: With dead ends: 25 [2022-02-14 21:27:31,134 INFO L226 Difference]: Without dead ends: 25 [2022-02-14 21:27:31,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:27:31,135 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:27:31,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:27:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-14 21:27:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-02-14 21:27:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:27:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-02-14 21:27:31,138 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-02-14 21:27:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:27:31,138 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-02-14 21:27:31,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:27:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-02-14 21:27:31,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 21:27:31,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:27:31,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:27:31,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-14 21:27:31,139 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:27:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:27:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1606116621, now seen corresponding path program 1 times [2022-02-14 21:27:31,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:27:31,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55474704] [2022-02-14 21:27:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:27:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:27:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:27:31,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:27:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:27:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:27:31,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:27:31,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55474704] [2022-02-14 21:27:31,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55474704] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:27:31,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:27:31,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:27:31,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787073717] [2022-02-14 21:27:31,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:27:31,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:27:31,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:27:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:27:31,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:27:31,183 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:27:31,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:27:31,209 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-02-14 21:27:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:27:31,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-14 21:27:31,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:27:31,210 INFO L225 Difference]: With dead ends: 24 [2022-02-14 21:27:31,210 INFO L226 Difference]: Without dead ends: 24 [2022-02-14 21:27:31,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:27:31,211 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:27:31,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:27:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-14 21:27:31,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-02-14 21:27:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:27:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-02-14 21:27:31,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-02-14 21:27:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:27:31,214 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-02-14 21:27:31,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:27:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-02-14 21:27:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-14 21:27:31,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:27:31,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:27:31,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 21:27:31,228 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:27:31,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:27:31,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1773342651, now seen corresponding path program 1 times [2022-02-14 21:27:31,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:27:31,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041867079] [2022-02-14 21:27:31,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:27:31,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:27:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-14 21:27:31,241 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-14 21:27:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-14 21:27:31,262 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-14 21:27:31,262 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-14 21:27:31,262 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-14 21:27:31,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-14 21:27:31,265 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-02-14 21:27:31,267 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-14 21:27:31,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:27:31 BasicIcfg [2022-02-14 21:27:31,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-14 21:27:31,284 INFO L158 Benchmark]: Toolchain (without parser) took 1411.73ms. Allocated memory is still 181.4MB. Free memory was 134.0MB in the beginning and 88.3MB in the end (delta: 45.7MB). Peak memory consumption was 44.5MB. Max. memory is 8.0GB. [2022-02-14 21:27:31,284 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-14 21:27:31,284 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.78ms. Allocated memory is still 181.4MB. Free memory was 133.9MB in the beginning and 160.2MB in the end (delta: -26.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-14 21:27:31,285 INFO L158 Benchmark]: Boogie Preprocessor took 32.72ms. Allocated memory is still 181.4MB. Free memory was 160.2MB in the beginning and 158.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-14 21:27:31,285 INFO L158 Benchmark]: RCFGBuilder took 205.85ms. Allocated memory is still 181.4MB. Free memory was 158.6MB in the beginning and 148.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-14 21:27:31,286 INFO L158 Benchmark]: IcfgTransformer took 162.08ms. Allocated memory is still 181.4MB. Free memory was 148.1MB in the beginning and 139.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-02-14 21:27:31,286 INFO L158 Benchmark]: TraceAbstraction took 788.52ms. Allocated memory is still 181.4MB. Free memory was 139.2MB in the beginning and 88.3MB in the end (delta: 50.9MB). Peak memory consumption was 51.4MB. Max. memory is 8.0GB. [2022-02-14 21:27:31,288 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 150.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 215.78ms. Allocated memory is still 181.4MB. Free memory was 133.9MB in the beginning and 160.2MB in the end (delta: -26.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.72ms. Allocated memory is still 181.4MB. Free memory was 160.2MB in the beginning and 158.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 205.85ms. Allocated memory is still 181.4MB. Free memory was 158.6MB in the beginning and 148.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 162.08ms. Allocated memory is still 181.4MB. Free memory was 148.1MB in the beginning and 139.7MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 788.52ms. Allocated memory is still 181.4MB. Free memory was 139.2MB in the beginning and 88.3MB in the end (delta: 50.9MB). Peak memory consumption was 51.4MB. 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 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = 0; [L16] unsigned int z = 0; [L17] unsigned int w = 0; VAL [w=0, x=0, y=0, z=0] [L19] COND TRUE x < 0x0fffffff [L20] y = 0 VAL [w=0, x=0, y=0, z=0] [L22] COND TRUE y < 0x0fffffff [L23] z =0 VAL [w=0, x=0, y=0, z=0] [L24] COND TRUE z <0x0fffffff [L25] z++ VAL [w=0, x=0, y=0, z=268435455, z++=268435458] [L24] COND FALSE !(z <0x0fffffff) VAL [w=0, x=0, y=0, z=268435455, z++=268435458] [L27] CALL __VERIFIER_assert(!(z % 4)) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 89 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 80 mSDsluCounter, 111 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 30 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 74 IncrementalHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 30 mSolverCounterUnsat, 87 mSDtfsCounter, 74 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 15, 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, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 73 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate proved your program to be incorrect! [2022-02-14 21:27:31,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...