/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/ps2-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 08:09:43,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 08:09:43,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 08:09:43,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-06 08:09:43,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-06 08:09:43,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-06 08:09:43,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-06 08:09:43,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-06 08:09:43,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-06 08:09:43,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-06 08:09:43,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-06 08:09:43,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-06 08:09:43,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 08:09:43,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 08:09:43,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 08:09:43,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 08:09:43,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 08:09:43,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 08:09:43,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 08:09:43,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 08:09:43,952 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 08:09:43,955 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 08:09:43,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 08:09:43,960 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 08:09:43,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 08:09:43,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 08:09:43,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 08:09:43,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 08:09:43,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 08:09:43,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-06 08:09:43,989 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 08:09:43,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 08:09:43,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 08:09:43,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 08:09:43,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 08:09:43,990 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 08:09:43,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 08:09:43,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 08:09:43,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 08:09:43,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 08:09:43,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 08:09:43,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 08:09:43,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 08:09:43,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 08:09:43,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 08:09:43,992 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 08:09:43,992 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 08:09:43,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 08:09:43,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:09:43,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 08:09:43,993 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-06 08:09:43,994 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-06 08:09:43,994 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 08:09:44,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 08:09:44,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 08:09:44,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 08:09:44,249 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 08:09:44,250 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 08:09:44,251 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound1.c [2022-04-06 08:09:44,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe876088/aa7bff84662c496491c91e15b5b8138c/FLAGcfe3f2022 [2022-04-06 08:09:44,649 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 08:09:44,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_valuebound1.c [2022-04-06 08:09:44,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe876088/aa7bff84662c496491c91e15b5b8138c/FLAGcfe3f2022 [2022-04-06 08:09:45,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fe876088/aa7bff84662c496491c91e15b5b8138c [2022-04-06 08:09:45,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 08:09:45,072 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-06 08:09:45,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 08:09:45,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 08:09:45,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 08:09:45,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b52c1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45, skipping insertion in model container [2022-04-06 08:09:45,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 08:09:45,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 08:09:45,222 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/ps2-ll_valuebound1.c[454,467] [2022-04-06 08:09:45,237 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:09:45,243 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 08:09:45,255 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/ps2-ll_valuebound1.c[454,467] [2022-04-06 08:09:45,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 08:09:45,275 INFO L208 MainTranslator]: Completed translation [2022-04-06 08:09:45,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45 WrapperNode [2022-04-06 08:09:45,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 08:09:45,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 08:09:45,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 08:09:45,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 08:09:45,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 08:09:45,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 08:09:45,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 08:09:45,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 08:09:45,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 08:09:45,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:45,352 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) [2022-04-06 08:09:45,372 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 [2022-04-06 08:09:45,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 08:09:45,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 08:09:45,387 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 08:09:45,387 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 08:09:45,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 08:09:45,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 08:09:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 08:09:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 08:09:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 08:09:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 08:09:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 08:09:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 08:09:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 08:09:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 08:09:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 08:09:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 08:09:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 08:09:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 08:09:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 08:09:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 08:09:45,444 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 08:09:45,445 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 08:09:45,577 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 08:09:45,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 08:09:45,582 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 08:09:45,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:45 BoogieIcfgContainer [2022-04-06 08:09:45,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 08:09:45,584 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-06 08:09:45,584 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-06 08:09:45,585 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-06 08:09:45,587 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:45" (1/1) ... [2022-04-06 08:09:45,589 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-06 08:09:45,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:09:45 BasicIcfg [2022-04-06 08:09:45,601 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-06 08:09:45,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 08:09:45,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 08:09:45,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 08:09:45,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:09:45" (1/4) ... [2022-04-06 08:09:45,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd3d05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:09:45, skipping insertion in model container [2022-04-06 08:09:45,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:09:45" (2/4) ... [2022-04-06 08:09:45,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd3d05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:09:45, skipping insertion in model container [2022-04-06 08:09:45,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:09:45" (3/4) ... [2022-04-06 08:09:45,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bd3d05a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:09:45, skipping insertion in model container [2022-04-06 08:09:45,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.04 08:09:45" (4/4) ... [2022-04-06 08:09:45,621 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_valuebound1.cJordan [2022-04-06 08:09:45,640 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-06 08:09:45,640 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 08:09:45,697 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 08:09:45,703 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 [2022-04-06 08:09:45,703 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 08:09:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 08:09:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 08:09:45,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:45,736 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:45,737 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash 409333534, now seen corresponding path program 1 times [2022-04-06 08:09:45,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:45,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193691961] [2022-04-06 08:09:45,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:45,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:45,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 08:09:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:45,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 08:09:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:45,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:45,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193691961] [2022-04-06 08:09:45,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193691961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:09:45,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:09:45,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 08:09:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992317528] [2022-04-06 08:09:45,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:45,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 08:09:45,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 08:09:45,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:09:45,968 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 08:09:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:46,014 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-04-06 08:09:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 08:09:46,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 08:09:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:46,028 INFO L225 Difference]: With dead ends: 27 [2022-04-06 08:09:46,028 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 08:09:46,029 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 08:09:46,034 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 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 [2022-04-06 08:09:46,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:46,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 08:09:46,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 08:09:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 08:09:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-06 08:09:46,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-04-06 08:09:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:46,062 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-06 08:09:46,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 08:09:46,063 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-06 08:09:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 08:09:46,064 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:46,064 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:46,065 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 08:09:46,065 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1396244096, now seen corresponding path program 1 times [2022-04-06 08:09:46,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:46,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046995782] [2022-04-06 08:09:46,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:46,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:46,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:46,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659888670] [2022-04-06 08:09:46,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:46,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:46,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:46,112 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) [2022-04-06 08:09:46,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 08:09:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:46,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 08:09:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:46,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 08:09:46,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:46,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046995782] [2022-04-06 08:09:46,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:46,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659888670] [2022-04-06 08:09:46,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659888670] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 08:09:46,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 08:09:46,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 08:09:46,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116835106] [2022-04-06 08:09:46,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:46,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 08:09:46,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:46,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 08:09:46,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 08:09:46,267 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 08:09:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:46,325 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-04-06 08:09:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 08:09:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 08:09:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:46,326 INFO L225 Difference]: With dead ends: 30 [2022-04-06 08:09:46,326 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 08:09:46,327 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 08:09:46,328 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:46,328 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 08:09:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-06 08:09:46,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 08:09:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-04-06 08:09:46,333 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2022-04-06 08:09:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:46,334 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-04-06 08:09:46,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 08:09:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-04-06 08:09:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 08:09:46,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 08:09:46,335 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 08:09:46,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:46,535 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 [2022-04-06 08:09:46,536 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 08:09:46,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 08:09:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash 279144821, now seen corresponding path program 1 times [2022-04-06 08:09:46,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 08:09:46,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740857020] [2022-04-06 08:09:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:46,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 08:09:46,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 08:09:46,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037843945] [2022-04-06 08:09:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 08:09:46,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 08:09:46,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 08:09:46,554 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) [2022-04-06 08:09:46,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 08:09:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 08:09:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 08:09:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 08:09:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 08:09:46,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 08:09:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 08:09:46,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 08:09:46,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740857020] [2022-04-06 08:09:46,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 08:09:46,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037843945] [2022-04-06 08:09:46,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037843945] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 08:09:46,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 08:09:46,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 08:09:46,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048150202] [2022-04-06 08:09:46,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 08:09:46,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 08:09:46,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-06 08:09:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 08:09:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 08:09:46,868 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 08:09:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 08:09:46,897 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2022-04-06 08:09:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 08:09:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-06 08:09:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 08:09:46,899 INFO L225 Difference]: With dead ends: 27 [2022-04-06 08:09:46,899 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 08:09:46,900 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 08:09:46,911 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 08:09:46,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 08:09:46,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 08:09:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 08:09:46,913 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) [2022-04-06 08:09:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 08:09:46,913 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-04-06 08:09:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 08:09:46,913 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 08:09:46,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 08:09:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 08:09:46,914 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 08:09:46,916 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 08:09:46,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 08:09:47,139 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 [2022-04-06 08:09:47,142 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-04-06 08:09:47,143 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 08:09:47,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 08:09:47 BasicIcfg [2022-04-06 08:09:47,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 08:09:47,146 INFO L158 Benchmark]: Toolchain (without parser) took 2074.18ms. Allocated memory was 181.4MB in the beginning and 218.1MB in the end (delta: 36.7MB). Free memory was 132.8MB in the beginning and 194.6MB in the end (delta: -61.8MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 08:09:47,147 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 181.4MB. Free memory was 148.9MB in the beginning and 148.8MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 08:09:47,147 INFO L158 Benchmark]: CACSL2BoogieTranslator took 201.91ms. Allocated memory is still 181.4MB. Free memory was 132.7MB in the beginning and 157.4MB in the end (delta: -24.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 08:09:47,148 INFO L158 Benchmark]: Boogie Preprocessor took 37.98ms. Allocated memory is still 181.4MB. Free memory was 157.4MB in the beginning and 156.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 08:09:47,148 INFO L158 Benchmark]: RCFGBuilder took 266.44ms. Allocated memory is still 181.4MB. Free memory was 156.1MB in the beginning and 146.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 08:09:47,148 INFO L158 Benchmark]: IcfgTransformer took 17.01ms. Allocated memory is still 181.4MB. Free memory was 146.1MB in the beginning and 145.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 08:09:47,149 INFO L158 Benchmark]: TraceAbstraction took 1544.01ms. Allocated memory was 181.4MB in the beginning and 218.1MB in the end (delta: 36.7MB). Free memory was 144.6MB in the beginning and 194.6MB in the end (delta: -50.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 08:09:47,151 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 181.4MB. Free memory was 148.9MB in the beginning and 148.8MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 201.91ms. Allocated memory is still 181.4MB. Free memory was 132.7MB in the beginning and 157.4MB in the end (delta: -24.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.98ms. Allocated memory is still 181.4MB. Free memory was 157.4MB in the beginning and 156.1MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 266.44ms. Allocated memory is still 181.4MB. Free memory was 156.1MB in the beginning and 146.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 17.01ms. Allocated memory is still 181.4MB. Free memory was 146.1MB in the beginning and 145.1MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1544.01ms. Allocated memory was 181.4MB in the beginning and 218.1MB in the end (delta: 36.7MB). Free memory was 144.6MB in the beginning and 194.6MB in the end (delta: -50.0MB). There was no memory consumed. 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: 12]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 156 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 94 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 42 IncrementalHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 62 mSDtfsCounter, 42 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=2, InterpolantAutomatonStates: 13, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 58 NumberOfCodeBlocks, 58 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 186 SizeOfPredicates, 2 NumberOfNonLiveVariables, 153 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 6/8 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! [2022-04-06 08:09:47,181 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...