/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/AutomizerCInlineTransformed.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 08:33:14,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 08:33:14,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 08:33:14,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 08:33:14,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 08:33:14,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 08:33:14,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 08:33:14,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 08:33:14,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 08:33:14,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 08:33:14,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 08:33:14,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 08:33:14,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 08:33:14,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 08:33:14,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 08:33:14,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 08:33:14,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 08:33:14,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 08:33:14,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 08:33:14,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 08:33:14,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 08:33:14,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 08:33:14,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 08:33:14,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 08:33:14,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-10 08:33:14,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 08:33:14,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 08:33:14,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 08:33:14,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_BvToInt_BITWISE.epf [2022-01-10 08:33:14,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 08:33:14,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 08:33:14,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 08:33:14,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 08:33:14,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 08:33:14,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 08:33:14,268 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 08:33:14,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 08:33:14,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 08:33:14,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 08:33:14,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 08:33:14,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 08:33:14,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 08:33:14,269 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 08:33:14,269 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 08:33:14,269 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 08:33:14,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 08:33:14,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 08:33:14,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 08:33:14,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 08:33:14,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 08:33:14,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:33:14,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-01-10 08:33:14,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 08:33:14,272 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-01-10 08:33:14,272 INFO L138 SettingsManager]: * TransformationType=BV_TO_INT_BITWISE WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 08:33:14,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 08:33:14,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 08:33:14,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 08:33:14,461 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 08:33:14,461 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 08:33:14,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2022-01-10 08:33:14,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fe4b8ce/b30a4ba883674ee8bff8f2dd5ad34cbc/FLAGe5d19b1c2 [2022-01-10 08:33:14,854 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 08:33:14,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2022-01-10 08:33:14,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fe4b8ce/b30a4ba883674ee8bff8f2dd5ad34cbc/FLAGe5d19b1c2 [2022-01-10 08:33:14,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32fe4b8ce/b30a4ba883674ee8bff8f2dd5ad34cbc [2022-01-10 08:33:14,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 08:33:14,876 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-01-10 08:33:14,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 08:33:14,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 08:33:14,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 08:33:14,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:33:14" (1/1) ... [2022-01-10 08:33:14,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d93f74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:14, skipping insertion in model container [2022-01-10 08:33:14,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 08:33:14" (1/1) ... [2022-01-10 08:33:14,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 08:33:14,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 08:33:15,050 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c[322,335] [2022-01-10 08:33:15,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:33:15,066 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 08:33:15,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c[322,335] [2022-01-10 08:33:15,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 08:33:15,082 INFO L208 MainTranslator]: Completed translation [2022-01-10 08:33:15,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15 WrapperNode [2022-01-10 08:33:15,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 08:33:15,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 08:33:15,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 08:33:15,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 08:33:15,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,103 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2022-01-10 08:33:15,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 08:33:15,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 08:33:15,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 08:33:15,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 08:33:15,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 08:33:15,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 08:33:15,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 08:33:15,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 08:33:15,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 08:33:15,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:33:15,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-10 08:33:15,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-10 08:33:15,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 08:33:15,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 08:33:15,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 08:33:15,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 08:33:15,248 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 08:33:15,249 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 08:33:15,321 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 08:33:15,325 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 08:33:15,325 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-10 08:33:15,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:33:15 BoogieIcfgContainer [2022-01-10 08:33:15,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 08:33:15,326 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-01-10 08:33:15,326 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-01-10 08:33:15,327 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-01-10 08:33:15,329 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:33:15" (1/1) ... [2022-01-10 08:33:15,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:33:15 BasicIcfg [2022-01-10 08:33:15,356 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-01-10 08:33:15,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 08:33:15,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 08:33:15,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 08:33:15,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 08:33:14" (1/4) ... [2022-01-10 08:33:15,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71fe0dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:33:15, skipping insertion in model container [2022-01-10 08:33:15,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 08:33:15" (2/4) ... [2022-01-10 08:33:15,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71fe0dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 08:33:15, skipping insertion in model container [2022-01-10 08:33:15,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 08:33:15" (3/4) ... [2022-01-10 08:33:15,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71fe0dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.01 08:33:15, skipping insertion in model container [2022-01-10 08:33:15,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 10.01 08:33:15" (4/4) ... [2022-01-10 08:33:15,361 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-2.cTransformedIcfg [2022-01-10 08:33:15,364 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 08:33:15,364 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 08:33:15,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 08:33:15,395 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-10 08:33:15,395 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 08:33:15,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2022-01-10 08:33:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 08:33:15,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:33:15,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 08:33:15,416 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:33:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:33:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1953496263, now seen corresponding path program 1 times [2022-01-10 08:33:15,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:33:15,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136594832] [2022-01-10 08:33:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:33:15,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:33:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:33:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:15,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:33:15,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136594832] [2022-01-10 08:33:15,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136594832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:33:15,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:33:15,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 08:33:15,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59502164] [2022-01-10 08:33:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:33:15,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 08:33:15,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:33:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 08:33:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:33:15,620 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-01-10 08:33:15,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:33:15,628 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-01-10 08:33:15,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 08:33:15,629 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) Word has length 6 [2022-01-10 08:33:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:33:15,635 INFO L225 Difference]: With dead ends: 20 [2022-01-10 08:33:15,635 INFO L226 Difference]: Without dead ends: 8 [2022-01-10 08:33:15,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 08:33:15,639 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:33:15,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:33:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-01-10 08:33:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-01-10 08:33:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 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) [2022-01-10 08:33:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-01-10 08:33:15,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-01-10 08:33:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:33:15,659 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-01-10 08:33:15,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-01-10 08:33:15,661 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-01-10 08:33:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-10 08:33:15,661 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:33:15,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-10 08:33:15,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-10 08:33:15,662 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:33:15,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:33:15,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1953526054, now seen corresponding path program 1 times [2022-01-10 08:33:15,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:33:15,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079235722] [2022-01-10 08:33:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:33:15,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:33:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:33:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:15,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:33:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079235722] [2022-01-10 08:33:15,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079235722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 08:33:15,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 08:33:15,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 08:33:15,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577852714] [2022-01-10 08:33:15,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 08:33:15,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 08:33:15,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:33:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 08:33:15,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:33:15,724 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-01-10 08:33:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:33:15,743 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-01-10 08:33:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 08:33:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) Word has length 6 [2022-01-10 08:33:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:33:15,744 INFO L225 Difference]: With dead ends: 16 [2022-01-10 08:33:15,745 INFO L226 Difference]: Without dead ends: 10 [2022-01-10 08:33:15,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 08:33:15,746 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:33:15,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:33:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-01-10 08:33:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-01-10 08:33:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-01-10 08:33:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-01-10 08:33:15,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-01-10 08:33:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:33:15,749 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-01-10 08:33:15,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-01-10 08:33:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-01-10 08:33:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-10 08:33:15,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:33:15,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:33:15,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-10 08:33:15,750 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:33:15,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:33:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash 467229864, now seen corresponding path program 1 times [2022-01-10 08:33:15,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:33:15,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693680706] [2022-01-10 08:33:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:33:15,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:33:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:33:15,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:15,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:33:15,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693680706] [2022-01-10 08:33:15,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693680706] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:33:15,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160586143] [2022-01-10 08:33:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:33:15,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:33:15,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:33:15,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:33:15,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-10 08:33:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:33:15,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 08:33:15,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:33:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:15,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:33:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:15,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160586143] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:33:15,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:33:15,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-01-10 08:33:15,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680668655] [2022-01-10 08:33:15,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:33:15,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 08:33:15,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:33:15,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 08:33:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 08:33:15,923 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-01-10 08:33:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:33:15,963 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2022-01-10 08:33:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 08:33:15,964 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) Word has length 8 [2022-01-10 08:33:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:33:15,964 INFO L225 Difference]: With dead ends: 20 [2022-01-10 08:33:15,965 INFO L226 Difference]: Without dead ends: 14 [2022-01-10 08:33:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-10 08:33:15,967 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:33:15,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:33:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-10 08:33:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2022-01-10 08:33:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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) [2022-01-10 08:33:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-01-10 08:33:15,970 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2022-01-10 08:33:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:33:15,971 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-01-10 08:33:15,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-01-10 08:33:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-01-10 08:33:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-10 08:33:15,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:33:15,971 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:33:15,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-10 08:33:16,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:33:16,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:33:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:33:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 921100717, now seen corresponding path program 1 times [2022-01-10 08:33:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:33:16,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404004223] [2022-01-10 08:33:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:33:16,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:33:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:33:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:16,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:33:16,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404004223] [2022-01-10 08:33:16,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404004223] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:33:16,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707328603] [2022-01-10 08:33:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:33:16,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:33:16,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:33:16,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:33:16,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-10 08:33:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:33:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 08:33:16,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:33:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:16,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:33:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:16,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707328603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:33:16,453 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:33:16,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-01-10 08:33:16,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463704448] [2022-01-10 08:33:16,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:33:16,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-10 08:33:16,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:33:16,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-10 08:33:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-10 08:33:16,457 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-01-10 08:33:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:33:16,530 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-01-10 08:33:16,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-10 08:33:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) Word has length 12 [2022-01-10 08:33:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:33:16,531 INFO L225 Difference]: With dead ends: 28 [2022-01-10 08:33:16,531 INFO L226 Difference]: Without dead ends: 21 [2022-01-10 08:33:16,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-01-10 08:33:16,532 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:33:16,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 08:33:16,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-10 08:33:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-01-10 08:33:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) [2022-01-10 08:33:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-10 08:33:16,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 12 [2022-01-10 08:33:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:33:16,545 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-10 08:33:16,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 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) [2022-01-10 08:33:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-10 08:33:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-10 08:33:16,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:33:16,546 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 08:33:16,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-10 08:33:16,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-10 08:33:16,761 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:33:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:33:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 70751925, now seen corresponding path program 2 times [2022-01-10 08:33:16,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:33:16,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366473589] [2022-01-10 08:33:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:33:16,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:33:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:33:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-10 08:33:16,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:33:16,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366473589] [2022-01-10 08:33:16,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366473589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:33:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221863867] [2022-01-10 08:33:16,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 08:33:16,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:33:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:33:16,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:33:16,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-10 08:33:16,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 08:33:16,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:33:16,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-10 08:33:16,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:33:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 33 proven. 3 refuted. 1 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 08:33:36,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:33:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-10 08:33:36,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221863867] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:33:36,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:33:36,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 19 [2022-01-10 08:33:36,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617651765] [2022-01-10 08:33:36,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:33:36,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-10 08:33:36,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:33:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-10 08:33:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=236, Unknown=8, NotChecked=0, Total=342 [2022-01-10 08:33:36,602 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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) [2022-01-10 08:34:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:34:26,240 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-01-10 08:34:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 08:34:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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) Word has length 20 [2022-01-10 08:34:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:34:26,242 INFO L225 Difference]: With dead ends: 36 [2022-01-10 08:34:26,242 INFO L226 Difference]: Without dead ends: 29 [2022-01-10 08:34:26,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=236, Invalid=501, Unknown=19, NotChecked=0, Total=756 [2022-01-10 08:34:26,243 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 08:34:26,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 36 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-01-10 08:34:26,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-10 08:34:26,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-10 08:34:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 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) [2022-01-10 08:34:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-10 08:34:26,247 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2022-01-10 08:34:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:34:26,248 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-10 08:34:26,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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) [2022-01-10 08:34:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-10 08:34:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-10 08:34:26,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:34:26,248 INFO L514 BasicCegarLoop]: trace histogram [10, 7, 3, 1, 1, 1, 1, 1, 1] [2022-01-10 08:34:26,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-10 08:34:26,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:34:26,465 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:34:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:34:26,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1663084675, now seen corresponding path program 3 times [2022-01-10 08:34:26,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:34:26,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905473153] [2022-01-10 08:34:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:34:26,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:34:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:34:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 08:34:26,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:34:26,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905473153] [2022-01-10 08:34:26,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905473153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:34:26,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021658751] [2022-01-10 08:34:26,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 08:34:26,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:34:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:34:26,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:34:26,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-10 08:34:26,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-10 08:34:26,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:34:26,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-10 08:34:26,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:34:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 08:34:27,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:34:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 49 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 08:34:28,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021658751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:34:28,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:34:28,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 11] total 24 [2022-01-10 08:34:28,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434827356] [2022-01-10 08:34:28,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:34:28,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 08:34:28,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:34:28,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 08:34:28,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2022-01-10 08:34:28,076 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 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) [2022-01-10 08:34:29,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 08:34:29,095 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2022-01-10 08:34:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-10 08:34:29,096 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 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) Word has length 26 [2022-01-10 08:34:29,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 08:34:29,097 INFO L225 Difference]: With dead ends: 59 [2022-01-10 08:34:29,097 INFO L226 Difference]: Without dead ends: 44 [2022-01-10 08:34:29,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=355, Invalid=835, Unknown=0, NotChecked=0, Total=1190 [2022-01-10 08:34:29,098 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-10 08:34:29,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 161 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-01-10 08:34:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-10 08:34:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-01-10 08:34:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 states have internal predecessors, (46), 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) [2022-01-10 08:34:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-01-10 08:34:29,107 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 26 [2022-01-10 08:34:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 08:34:29,108 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-01-10 08:34:29,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 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) [2022-01-10 08:34:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-01-10 08:34:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-10 08:34:29,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 08:34:29,110 INFO L514 BasicCegarLoop]: trace histogram [16, 8, 8, 1, 1, 1, 1, 1, 1] [2022-01-10 08:34:29,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-10 08:34:29,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:34:29,310 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 08:34:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 08:34:29,311 INFO L85 PathProgramCache]: Analyzing trace with hash 653251150, now seen corresponding path program 4 times [2022-01-10 08:34:29,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-10 08:34:29,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111852510] [2022-01-10 08:34:29,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 08:34:29,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-10 08:34:29,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 08:34:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 135 proven. 72 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-10 08:34:29,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-10 08:34:29,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111852510] [2022-01-10 08:34:29,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111852510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-10 08:34:29,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594149666] [2022-01-10 08:34:29,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 08:34:29,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-10 08:34:29,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 08:34:29,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-10 08:34:29,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-10 08:34:29,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 08:34:29,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 08:34:29,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-10 08:34:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 08:34:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 135 proven. 72 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-10 08:34:29,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 08:34:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 133 proven. 81 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-10 08:34:31,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594149666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 08:34:31,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-10 08:34:31,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 22] total 40 [2022-01-10 08:34:31,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42350811] [2022-01-10 08:34:31,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-10 08:34:31,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-10 08:34:31,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-10 08:34:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-10 08:34:31,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=1102, Unknown=0, NotChecked=0, Total=1560 [2022-01-10 08:34:31,544 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 40 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 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)