/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:36:33,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:36:33,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:36:33,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 03:36:33,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 03:36:33,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 03:36:33,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 03:36:33,137 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 03:36:33,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 03:36:33,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 03:36:33,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 03:36:33,140 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 03:36:33,140 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:36:33,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:36:33,141 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:36:33,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:36:33,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:36:33,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:36:33,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:36:33,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:36:33,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:36:33,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:36:33,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:36:33,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:36:33,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 03:36:33,163 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 03:36:33,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 03:36:33,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 03:36:33,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 03:36:33,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 03:36:33,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 03:36:33,166 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 03:36:33,167 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 03:36:33,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 03:36:33,169 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 03:36:33,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 03:36:33,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 03:36:33,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 03:36:33,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:36:33,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:36:33,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:36:33,171 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-01-10 03:36:33,199 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:36:33,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:36:33,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:36:33,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:36:33,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:36:33,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:36:33,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:36:33,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:36:33,201 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:36:33,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:36:33,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:36:33,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:36:33,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:36:33,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:36:33,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:36:33,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:36:33,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:36:33,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:36:33,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:36:33,204 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:36:33,204 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:36:33,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:36:33,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:36:33,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:36:33,205 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:36:33,205 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:36:33,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:36:33,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:36:33,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:36:33,431 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:36:33,432 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:36:33,433 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2022-01-10 03:36:33,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384ba933a/cb6af708908e4e94ab3f70e9a428302b/FLAG41d573fb0 [2022-01-10 03:36:33,801 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:36:33,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i [2022-01-10 03:36:33,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384ba933a/cb6af708908e4e94ab3f70e9a428302b/FLAG41d573fb0 [2022-01-10 03:36:33,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384ba933a/cb6af708908e4e94ab3f70e9a428302b [2022-01-10 03:36:33,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:36:33,824 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:36:33,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:36:33,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:36:33,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:36:33,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:36:33" (1/1) ... [2022-01-10 03:36:33,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52208eb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:33, skipping insertion in model container [2022-01-10 03:36:33,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:36:33" (1/1) ... [2022-01-10 03:36:33,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:36:33,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:36:33,979 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i[816,829] [2022-01-10 03:36:34,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:36:34,023 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:36:34,031 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy4_ground-2.i[816,829] [2022-01-10 03:36:34,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:36:34,048 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:36:34,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34 WrapperNode [2022-01-10 03:36:34,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:36:34,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:36:34,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:36:34,050 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:36:34,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,072 INFO L137 Inliner]: procedures = 18, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 113 [2022-01-10 03:36:34,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:36:34,073 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:36:34,073 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:36:34,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:36:34,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:36:34,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:36:34,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:36:34,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:36:34,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (1/1) ... [2022-01-10 03:36:34,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:36:34,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:36:34,129 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 03:36:34,132 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 03:36:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:36:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:36:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:36:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:36:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:36:34,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:36:34,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:36:34,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:36:34,212 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:36:34,213 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:36:34,362 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:36:34,366 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:36:34,366 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-01-10 03:36:34,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:36:34 BoogieIcfgContainer [2022-01-10 03:36:34,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:36:34,368 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:36:34,368 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:36:34,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:36:34,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:36:33" (1/3) ... [2022-01-10 03:36:34,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4cc839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:36:34, skipping insertion in model container [2022-01-10 03:36:34,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:36:34" (2/3) ... [2022-01-10 03:36:34,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4cc839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:36:34, skipping insertion in model container [2022-01-10 03:36:34,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:36:34" (3/3) ... [2022-01-10 03:36:34,387 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy4_ground-2.i [2022-01-10 03:36:34,391 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:36:34,391 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:36:34,438 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:36:34,457 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 03:36:34,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:36:34,467 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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 03:36:34,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:36:34,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:34,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:34,471 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:34,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1890477095, now seen corresponding path program 1 times [2022-01-10 03:36:34,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:34,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922186148] [2022-01-10 03:36:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:36:34,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:34,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:34,485 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:34,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-01-10 03:36:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:36:34,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:36:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:34,616 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 03:36:34,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:36:34,617 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:34,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922186148] [2022-01-10 03:36:34,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922186148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:36:34,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:36:34,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:36:34,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922674982] [2022-01-10 03:36:34,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:36:34,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:36:34,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:34,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:36:34,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:36:34,642 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.56) internal successors, (39), 26 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) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 03:36:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:34,679 INFO L93 Difference]: Finished difference Result 52 states and 76 transitions. [2022-01-10 03:36:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:36:34,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) Word has length 15 [2022-01-10 03:36:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:34,687 INFO L225 Difference]: With dead ends: 52 [2022-01-10 03:36:34,688 INFO L226 Difference]: Without dead ends: 25 [2022-01-10 03:36:34,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 03:36:34,694 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:34,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:36:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-10 03:36:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-10 03:36:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 03:36:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-01-10 03:36:34,723 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2022-01-10 03:36:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:34,723 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-01-10 03:36:34,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 03:36:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-01-10 03:36:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-10 03:36:34,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:34,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:34,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:34,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:34,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:34,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1812867813, now seen corresponding path program 1 times [2022-01-10 03:36:34,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:34,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772243950] [2022-01-10 03:36:34,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:36:34,934 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:34,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:34,935 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:34,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-01-10 03:36:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:36:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:36:35,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:35,075 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 03:36:35,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:35,128 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 03:36:35,129 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:35,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772243950] [2022-01-10 03:36:35,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [772243950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:35,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:35,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:36:35,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830658394] [2022-01-10 03:36:35,133 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:35,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:36:35,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:35,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:36:35,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:36:35,136 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 03:36:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:35,200 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2022-01-10 03:36:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:36:35,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 17 [2022-01-10 03:36:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:35,202 INFO L225 Difference]: With dead ends: 49 [2022-01-10 03:36:35,202 INFO L226 Difference]: Without dead ends: 30 [2022-01-10 03:36:35,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:36:35,204 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:35,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 122 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:36:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-01-10 03:36:35,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-01-10 03:36:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 states have internal predecessors, (35), 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 03:36:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-01-10 03:36:35,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2022-01-10 03:36:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:35,215 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-01-10 03:36:35,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 03:36:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-01-10 03:36:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 03:36:35,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:35,216 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:35,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:35,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:35,427 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:35,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1072476703, now seen corresponding path program 2 times [2022-01-10 03:36:35,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:35,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941674244] [2022-01-10 03:36:35,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:36:35,428 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:35,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:35,431 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:35,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-01-10 03:36:35,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:36:35,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:35,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:36:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-10 03:36:35,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:36:35,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:35,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941674244] [2022-01-10 03:36:35,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941674244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:36:35,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:36:35,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:36:35,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973635865] [2022-01-10 03:36:35,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:36:35,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:36:35,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:35,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:36:35,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:36:35,532 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 03:36:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:35,589 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-01-10 03:36:35,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:36:35,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 23 [2022-01-10 03:36:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:35,591 INFO L225 Difference]: With dead ends: 54 [2022-01-10 03:36:35,591 INFO L226 Difference]: Without dead ends: 38 [2022-01-10 03:36:35,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 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 03:36:35,592 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:35,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 31 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:36:35,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-10 03:36:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-01-10 03:36:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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 03:36:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-01-10 03:36:35,596 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23 [2022-01-10 03:36:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:35,596 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-01-10 03:36:35,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 03:36:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-01-10 03:36:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-10 03:36:35,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:35,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:35,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:35,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:35,805 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:35,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1256809879, now seen corresponding path program 1 times [2022-01-10 03:36:35,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:35,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103512721] [2022-01-10 03:36:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:36:35,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:35,808 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:35,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-01-10 03:36:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:36:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:36:35,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:36:35,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:36:36,116 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103512721] [2022-01-10 03:36:36,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103512721] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:36,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:36,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:36:36,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138947580] [2022-01-10 03:36:36,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:36,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:36:36,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:36:36,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:36:36,118 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 03:36:36,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:36,362 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-01-10 03:36:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:36:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 31 [2022-01-10 03:36:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:36,364 INFO L225 Difference]: With dead ends: 69 [2022-01-10 03:36:36,364 INFO L226 Difference]: Without dead ends: 46 [2022-01-10 03:36:36,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:36:36,365 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:36,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 170 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:36:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-10 03:36:36,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-10 03:36:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 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 03:36:36,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-01-10 03:36:36,371 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 31 [2022-01-10 03:36:36,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:36,371 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-01-10 03:36:36,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 03:36:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-01-10 03:36:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 03:36:36,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:36,372 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:36,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:36,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:36,573 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:36,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:36,573 INFO L85 PathProgramCache]: Analyzing trace with hash -805149301, now seen corresponding path program 2 times [2022-01-10 03:36:36,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:36,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716706223] [2022-01-10 03:36:36,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:36:36,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:36,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:36,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:36,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-01-10 03:36:36,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:36:36,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:36,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:36:36,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:36:36,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-10 03:36:37,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:37,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716706223] [2022-01-10 03:36:37,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716706223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:37,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:37,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:36:37,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277793830] [2022-01-10 03:36:37,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:37,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:36:37,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:37,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:36:37,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:36:37,257 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 03:36:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:38,264 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2022-01-10 03:36:38,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:36:38,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 43 [2022-01-10 03:36:38,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:38,267 INFO L225 Difference]: With dead ends: 93 [2022-01-10 03:36:38,267 INFO L226 Difference]: Without dead ends: 70 [2022-01-10 03:36:38,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 03:36:38,268 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:38,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 314 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:36:38,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-10 03:36:38,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-01-10 03:36:38,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 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 03:36:38,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-01-10 03:36:38,274 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 43 [2022-01-10 03:36:38,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:38,274 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-01-10 03:36:38,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 03:36:38,275 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-01-10 03:36:38,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-10 03:36:38,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:38,276 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:38,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:38,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:38,485 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:38,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash 558660467, now seen corresponding path program 3 times [2022-01-10 03:36:38,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043311958] [2022-01-10 03:36:38,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:36:38,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:38,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:38,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:38,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-01-10 03:36:38,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-10 03:36:38,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:38,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:36:38,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2022-01-10 03:36:38,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2022-01-10 03:36:38,800 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:38,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043311958] [2022-01-10 03:36:38,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043311958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:38,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:38,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:36:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354925643] [2022-01-10 03:36:38,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:38,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:36:38,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:36:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:36:38,801 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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 03:36:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:38,949 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2022-01-10 03:36:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:36:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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 67 [2022-01-10 03:36:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:38,950 INFO L225 Difference]: With dead ends: 113 [2022-01-10 03:36:38,950 INFO L226 Difference]: Without dead ends: 94 [2022-01-10 03:36:38,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:36:38,951 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:38,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 53 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:36:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-10 03:36:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-01-10 03:36:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.064516129032258) internal successors, (99), 93 states have internal predecessors, (99), 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 03:36:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2022-01-10 03:36:38,958 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 67 [2022-01-10 03:36:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:38,958 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2022-01-10 03:36:38,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 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 03:36:38,958 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2022-01-10 03:36:38,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-10 03:36:38,964 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:38,964 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:38,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:39,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:39,172 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:39,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:39,172 INFO L85 PathProgramCache]: Analyzing trace with hash -791399973, now seen corresponding path program 4 times [2022-01-10 03:36:39,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:39,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648261641] [2022-01-10 03:36:39,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:36:39,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:39,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:39,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:39,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-01-10 03:36:39,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:36:39,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:39,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:36:39,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 03:36:39,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-10 03:36:41,019 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:41,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648261641] [2022-01-10 03:36:41,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648261641] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:41,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:41,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 03:36:41,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204446923] [2022-01-10 03:36:41,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:41,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 03:36:41,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 03:36:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 03:36:41,021 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 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 03:36:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:46,683 INFO L93 Difference]: Finished difference Result 189 states and 222 transitions. [2022-01-10 03:36:46,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 03:36:46,683 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 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 91 [2022-01-10 03:36:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:46,684 INFO L225 Difference]: With dead ends: 189 [2022-01-10 03:36:46,684 INFO L226 Difference]: Without dead ends: 142 [2022-01-10 03:36:46,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 03:36:46,686 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 47 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:46,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 602 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 03:36:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-10 03:36:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-01-10 03:36:46,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 141 states have internal predecessors, (147), 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 03:36:46,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2022-01-10 03:36:46,695 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 91 [2022-01-10 03:36:46,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:46,695 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2022-01-10 03:36:46,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 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 03:36:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2022-01-10 03:36:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-10 03:36:46,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:46,697 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:46,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:46,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:46,898 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:46,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:46,898 INFO L85 PathProgramCache]: Analyzing trace with hash -126204501, now seen corresponding path program 5 times [2022-01-10 03:36:46,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:46,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850020933] [2022-01-10 03:36:46,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:36:46,899 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:46,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:46,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:46,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-01-10 03:36:50,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-01-10 03:36:50,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:50,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:36:50,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2164 trivial. 0 not checked. [2022-01-10 03:36:50,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:51,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2164 trivial. 0 not checked. [2022-01-10 03:36:51,074 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:51,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850020933] [2022-01-10 03:36:51,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850020933] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:51,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:51,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:36:51,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319639147] [2022-01-10 03:36:51,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:51,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:36:51,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:36:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:36:51,076 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 03:36:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:51,598 INFO L93 Difference]: Finished difference Result 227 states and 259 transitions. [2022-01-10 03:36:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:36:51,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 139 [2022-01-10 03:36:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:51,599 INFO L225 Difference]: With dead ends: 227 [2022-01-10 03:36:51,599 INFO L226 Difference]: Without dead ends: 190 [2022-01-10 03:36:51,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:36:51,600 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:51,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 97 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:36:51,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-10 03:36:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-01-10 03:36:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.0317460317460319) internal successors, (195), 189 states have internal predecessors, (195), 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 03:36:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 195 transitions. [2022-01-10 03:36:51,609 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 195 transitions. Word has length 139 [2022-01-10 03:36:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:51,609 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 195 transitions. [2022-01-10 03:36:51,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 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 03:36:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 195 transitions. [2022-01-10 03:36:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-10 03:36:51,611 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:51,611 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:51,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:51,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:51,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:51,820 INFO L85 PathProgramCache]: Analyzing trace with hash 719440507, now seen corresponding path program 6 times [2022-01-10 03:36:51,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:51,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339921847] [2022-01-10 03:36:51,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:36:51,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:51,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:51,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-01-10 03:36:54,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-01-10 03:36:54,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:36:54,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:36:54,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2022-01-10 03:36:54,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:36:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2416 trivial. 0 not checked. [2022-01-10 03:36:55,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:36:55,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339921847] [2022-01-10 03:36:55,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339921847] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:36:55,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:36:55,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:36:55,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065622051] [2022-01-10 03:36:55,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:36:55,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:36:55,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:36:55,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:36:55,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:36:55,201 INFO L87 Difference]: Start difference. First operand 190 states and 195 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 03:36:57,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:36:57,340 INFO L93 Difference]: Finished difference Result 359 states and 415 transitions. [2022-01-10 03:36:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:36:57,340 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 187 [2022-01-10 03:36:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:36:57,341 INFO L225 Difference]: With dead ends: 359 [2022-01-10 03:36:57,341 INFO L226 Difference]: Without dead ends: 286 [2022-01-10 03:36:57,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-01-10 03:36:57,342 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 554 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-10 03:36:57,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 141 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-10 03:36:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-10 03:36:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-01-10 03:36:57,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.0210526315789474) internal successors, (291), 285 states have internal predecessors, (291), 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 03:36:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 291 transitions. [2022-01-10 03:36:57,352 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 291 transitions. Word has length 187 [2022-01-10 03:36:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:36:57,352 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 291 transitions. [2022-01-10 03:36:57,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 03:36:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 291 transitions. [2022-01-10 03:36:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-10 03:36:57,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:36:57,355 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:36:57,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-01-10 03:36:57,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:36:57,559 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:36:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:36:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1996180453, now seen corresponding path program 7 times [2022-01-10 03:36:57,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:36:57,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83577760] [2022-01-10 03:36:57,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-10 03:36:57,561 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:36:57,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:36:57,562 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:36:57,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-01-10 03:36:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:36:58,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-10 03:36:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:36:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4052 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-01-10 03:36:59,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:37:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4052 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2022-01-10 03:37:03,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:37:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83577760] [2022-01-10 03:37:03,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83577760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:37:03,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:37:03,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-01-10 03:37:03,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793686890] [2022-01-10 03:37:03,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:37:03,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-10 03:37:03,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:37:03,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-10 03:37:03,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6722, Unknown=0, NotChecked=0, Total=9120 [2022-01-10 03:37:03,953 INFO L87 Difference]: Start difference. First operand 286 states and 291 transitions. Second operand has 96 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 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 03:37:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:37:48,109 INFO L93 Difference]: Finished difference Result 573 states and 630 transitions. [2022-01-10 03:37:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-10 03:37:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 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 283 [2022-01-10 03:37:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:37:48,111 INFO L225 Difference]: With dead ends: 573 [2022-01-10 03:37:48,111 INFO L226 Difference]: Without dead ends: 382 [2022-01-10 03:37:48,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 44.9s TimeCoverageRelationStatistics Valid=6814, Invalid=13208, Unknown=0, NotChecked=0, Total=20022 [2022-01-10 03:37:48,115 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 4605 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 4699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 4605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:37:48,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1154 Invalid, 4699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 4605 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-10 03:37:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-01-10 03:37:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-01-10 03:37:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.015748031496063) internal successors, (387), 381 states have internal predecessors, (387), 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 03:37:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 387 transitions. [2022-01-10 03:37:48,128 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 387 transitions. Word has length 283 [2022-01-10 03:37:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:37:48,129 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 387 transitions. [2022-01-10 03:37:48,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 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 03:37:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 387 transitions. [2022-01-10 03:37:48,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-10 03:37:48,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:37:48,132 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:37:48,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-01-10 03:37:48,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-01-10 03:37:48,351 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:37:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:37:48,352 INFO L85 PathProgramCache]: Analyzing trace with hash 811924411, now seen corresponding path program 8 times [2022-01-10 03:37:48,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:37:48,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709236101] [2022-01-10 03:37:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:37:48,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:37:48,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:37:48,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-01-10 03:37:48,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-01-10 03:37:49,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:37:49,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:37:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 96 conjunts are in the unsatisfiable core [2022-01-10 03:37:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates...