/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_two_index_04.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:41:52,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:41:52,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:41:52,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 03:41:52,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 03:41:52,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 03:41:52,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 03:41:52,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 03:41:52,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 03:41:52,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 03:41:52,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 03:41:52,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 03:41:52,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:41:52,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:41:52,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:41:52,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:41:52,152 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:41:52,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:41:52,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:41:52,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:41:52,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:41:52,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:41:52,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:41:52,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:41:52,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 03:41:52,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 03:41:52,165 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 03:41:52,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 03:41:52,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 03:41:52,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 03:41:52,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 03:41:52,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 03:41:52,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 03:41:52,168 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 03:41:52,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 03:41:52,169 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 03:41:52,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 03:41:52,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 03:41:52,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:41:52,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:41:52,170 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:41:52,171 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 03:41:52,189 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:41:52,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:41:52,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:41:52,190 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:41:52,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:41:52,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:41:52,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:41:52,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:41:52,191 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:41:52,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:41:52,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:41:52,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:41:52,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:41:52,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:41:52,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:41:52,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:41:52,192 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:41:52,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:41:52,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:41:52,193 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:41:52,193 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:41:52,193 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:41:52,193 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:41:52,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:41:52,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:41:52,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:41:52,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:41:52,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:41:52,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:41:52,379 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:41:52,381 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:41:52,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2022-01-10 03:41:52,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9353930c8/71888da93c1141bdbf44e11bc34c72a3/FLAGcc204b201 [2022-01-10 03:41:52,793 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:41:52,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2022-01-10 03:41:52,798 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9353930c8/71888da93c1141bdbf44e11bc34c72a3/FLAGcc204b201 [2022-01-10 03:41:52,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9353930c8/71888da93c1141bdbf44e11bc34c72a3 [2022-01-10 03:41:52,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:41:52,810 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:41:52,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:41:52,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:41:52,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:41:52,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:52,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75777040 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52, skipping insertion in model container [2022-01-10 03:41:52,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:52,818 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:41:52,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:41:52,945 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_two_index_04.i[814,827] [2022-01-10 03:41:52,956 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:41:52,962 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:41:52,971 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_two_index_04.i[814,827] [2022-01-10 03:41:52,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:41:52,989 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:41:52,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52 WrapperNode [2022-01-10 03:41:52,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:41:52,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:41:52,990 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:41:52,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:41:52,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:52,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,010 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-01-10 03:41:53,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:41:53,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:41:53,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:41:53,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:41:53,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,021 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,025 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:41:53,026 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:41:53,026 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:41:53,026 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:41:53,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (1/1) ... [2022-01-10 03:41:53,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:41:53,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:41:53,054 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 03:41:53,060 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 03:41:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:41:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:41:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-10 03:41:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-01-10 03:41:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:41:53,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:41:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-10 03:41:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-01-10 03:41:53,130 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:41:53,131 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:41:53,226 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:41:53,230 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:41:53,230 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-10 03:41:53,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:41:53 BoogieIcfgContainer [2022-01-10 03:41:53,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:41:53,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:41:53,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:41:53,241 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:41:53,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:41:52" (1/3) ... [2022-01-10 03:41:53,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bcb8c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:41:53, skipping insertion in model container [2022-01-10 03:41:53,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:41:52" (2/3) ... [2022-01-10 03:41:53,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50bcb8c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:41:53, skipping insertion in model container [2022-01-10 03:41:53,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:41:53" (3/3) ... [2022-01-10 03:41:53,244 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2022-01-10 03:41:53,249 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:41:53,249 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:41:53,287 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:41:53,292 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 03:41:53,292 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:41:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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 03:41:53,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-01-10 03:41:53,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:41:53,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:41:53,305 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:41:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:41:53,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2022-01-10 03:41:53,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:41:53,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822308765] [2022-01-10 03:41:53,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:41:53,317 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:41:53,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:41:53,320 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 03:41:53,321 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 03:41:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:41:53,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-10 03:41:53,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:41:53,444 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 03:41:53,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:41:53,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:41:53,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [822308765] [2022-01-10 03:41:53,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [822308765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:41:53,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:41:53,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:41:53,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567395813] [2022-01-10 03:41:53,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:41:53,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-10 03:41:53,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:41:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-10 03:41:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-10 03:41:53,477 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:41:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:41:53,519 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2022-01-10 03:41:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-10 03:41:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-01-10 03:41:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:41:53,532 INFO L225 Difference]: With dead ends: 28 [2022-01-10 03:41:53,532 INFO L226 Difference]: Without dead ends: 12 [2022-01-10 03:41:53,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 03:41:53,537 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:41:53,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:41:53,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-01-10 03:41:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-01-10 03:41:53,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:41:53,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-01-10 03:41:53,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-01-10 03:41:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:41:53,558 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-01-10 03:41:53,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:41:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-01-10 03:41:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-10 03:41:53,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:41:53,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:41:53,583 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 03:41:53,767 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 03:41:53,767 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:41:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:41:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2022-01-10 03:41:53,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:41:53,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913099747] [2022-01-10 03:41:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:41:53,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:41:53,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:41:53,772 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 03:41:53,773 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 03:41:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:41:53,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-10 03:41:53,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:41:53,834 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 03:41:53,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:41:53,878 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 03:41:53,879 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:41:53,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913099747] [2022-01-10 03:41:53,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913099747] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:41:53,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:41:53,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-10 03:41:53,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127842459] [2022-01-10 03:41:53,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:41:53,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-10 03:41:53,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:41:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-10 03:41:53,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-10 03:41:53,887 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 03:41:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:41:53,961 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2022-01-10 03:41:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:41:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 10 [2022-01-10 03:41:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:41:53,962 INFO L225 Difference]: With dead ends: 35 [2022-01-10 03:41:53,963 INFO L226 Difference]: Without dead ends: 27 [2022-01-10 03:41:53,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 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 03:41:53,964 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:41:53,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:41:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-10 03:41:53,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-01-10 03:41:53,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 03:41:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-10 03:41:53,968 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2022-01-10 03:41:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:41:53,968 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-10 03:41:53,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 03:41:53,968 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-10 03:41:53,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-10 03:41:53,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:41:53,969 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:41:53,977 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 03:41:54,175 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 03:41:54,175 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:41:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:41:54,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1963781416, now seen corresponding path program 1 times [2022-01-10 03:41:54,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:41:54,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852985734] [2022-01-10 03:41:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:41:54,177 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:41:54,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:41:54,178 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 03:41:54,179 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 03:41:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:41:54,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:41:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:41:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 03:41:54,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:41:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-10 03:41:54,356 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:41:54,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852985734] [2022-01-10 03:41:54,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852985734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:41:54,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:41:54,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-01-10 03:41:54,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415860781] [2022-01-10 03:41:54,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:41:54,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-10 03:41:54,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:41:54,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-10 03:41:54,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-10 03:41:54,358 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 03:41:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:41:54,575 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-01-10 03:41:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-10 03:41:54,576 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 03:41:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:41:54,576 INFO L225 Difference]: With dead ends: 45 [2022-01-10 03:41:54,577 INFO L226 Difference]: Without dead ends: 35 [2022-01-10 03:41:54,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 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 03:41:54,578 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:41:54,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 42 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:41:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-10 03:41:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2022-01-10 03:41:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 03:41:54,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-10 03:41:54,583 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2022-01-10 03:41:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:41:54,584 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-10 03:41:54,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 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 03:41:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-10 03:41:54,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-10 03:41:54,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:41:54,584 INFO L514 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:41:54,592 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 03:41:54,790 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 03:41:54,791 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:41:54,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:41:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1997332370, now seen corresponding path program 2 times [2022-01-10 03:41:54,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:41:54,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564915372] [2022-01-10 03:41:54,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:41:54,792 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:41:54,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:41:54,794 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 03:41:54,795 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 03:41:54,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-10 03:41:54,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:41:54,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-10 03:41:54,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:41:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:41:54,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:41:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-10 03:41:55,283 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:41:55,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564915372] [2022-01-10 03:41:55,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564915372] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:41:55,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:41:55,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-01-10 03:41:55,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418980562] [2022-01-10 03:41:55,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:41:55,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-10 03:41:55,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:41:55,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-10 03:41:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-01-10 03:41:55,285 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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 03:41:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:41:56,322 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2022-01-10 03:41:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-10 03:41:56,323 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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 22 [2022-01-10 03:41:56,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:41:56,325 INFO L225 Difference]: With dead ends: 80 [2022-01-10 03:41:56,325 INFO L226 Difference]: Without dead ends: 69 [2022-01-10 03:41:56,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 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 03:41:56,326 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:41:56,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 146 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:41:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-10 03:41:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2022-01-10 03:41:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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 03:41:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-01-10 03:41:56,333 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2022-01-10 03:41:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:41:56,333 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-01-10 03:41:56,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 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 03:41:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-01-10 03:41:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-10 03:41:56,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:41:56,334 INFO L514 BasicCegarLoop]: trace histogram [22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:41:56,343 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 03:41:56,542 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 03:41:56,543 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:41:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:41:56,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1613558856, now seen corresponding path program 3 times [2022-01-10 03:41:56,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:41:56,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858920162] [2022-01-10 03:41:56,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-10 03:41:56,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:41:56,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:41:56,546 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 03:41:56,547 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 03:41:56,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-10 03:41:56,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:41:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-10 03:41:56,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:41:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-10 03:41:56,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:41:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-01-10 03:41:56,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:41:56,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858920162] [2022-01-10 03:41:56,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858920162] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:41:56,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:41:56,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-01-10 03:41:56,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262124201] [2022-01-10 03:41:56,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:41:56,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-10 03:41:56,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:41:56,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-10 03:41:56,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-10 03:41:56,892 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:41:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:41:57,447 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2022-01-10 03:41:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-10 03:41:57,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-01-10 03:41:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:41:57,448 INFO L225 Difference]: With dead ends: 119 [2022-01-10 03:41:57,448 INFO L226 Difference]: Without dead ends: 113 [2022-01-10 03:41:57,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2022-01-10 03:41:57,450 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 292 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-10 03:41:57,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 178 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-10 03:41:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-10 03:41:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2022-01-10 03:41:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 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 03:41:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-01-10 03:41:57,456 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2022-01-10 03:41:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:41:57,456 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-01-10 03:41:57,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:41:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-01-10 03:41:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-10 03:41:57,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:41:57,457 INFO L514 BasicCegarLoop]: trace histogram [22, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:41:57,468 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 03:41:57,664 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 03:41:57,664 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:41:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:41:57,665 INFO L85 PathProgramCache]: Analyzing trace with hash -118703944, now seen corresponding path program 4 times [2022-01-10 03:41:57,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:41:57,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182595826] [2022-01-10 03:41:57,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-10 03:41:57,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:41:57,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:41:57,666 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 03:41:57,668 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 03:41:57,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-10 03:41:57,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:41:57,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-10 03:41:57,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:41:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-10 03:41:58,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:41:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-10 03:41:59,145 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:41:59,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182595826] [2022-01-10 03:41:59,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182595826] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:41:59,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:41:59,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-01-10 03:41:59,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049565437] [2022-01-10 03:41:59,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:41:59,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-10 03:41:59,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:41:59,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-10 03:41:59,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-01-10 03:41:59,156 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 03:42:04,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:42:04,762 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2022-01-10 03:42:04,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-10 03:42:04,763 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 45 [2022-01-10 03:42:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:42:04,764 INFO L225 Difference]: With dead ends: 153 [2022-01-10 03:42:04,764 INFO L226 Difference]: Without dead ends: 131 [2022-01-10 03:42:04,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2022-01-10 03:42:04,766 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 531 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:42:04,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [531 Valid, 511 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-10 03:42:04,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-10 03:42:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 71. [2022-01-10 03:42:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 70 states have internal predecessors, (73), 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 03:42:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-01-10 03:42:04,773 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 45 [2022-01-10 03:42:04,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:42:04,773 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-01-10 03:42:04,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 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 03:42:04,773 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-01-10 03:42:04,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-10 03:42:04,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:42:04,774 INFO L514 BasicCegarLoop]: trace histogram [46, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:42:04,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-01-10 03:42:04,982 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 03:42:04,982 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:42:04,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:42:04,983 INFO L85 PathProgramCache]: Analyzing trace with hash 919929144, now seen corresponding path program 5 times [2022-01-10 03:42:04,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:42:04,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552880331] [2022-01-10 03:42:04,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-10 03:42:04,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:42:04,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:42:04,984 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 03:42:04,986 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 03:42:05,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-01-10 03:42:05,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:42:05,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-10 03:42:05,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:42:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-10 03:42:06,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:42:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1186 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-10 03:42:12,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:42:12,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552880331] [2022-01-10 03:42:12,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552880331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:42:12,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:42:12,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-01-10 03:42:12,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402326989] [2022-01-10 03:42:12,330 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:42:12,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-10 03:42:12,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:42:12,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-10 03:42:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2398, Invalid=6722, Unknown=0, NotChecked=0, Total=9120 [2022-01-10 03:42:12,332 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 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 03:43:00,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:43:00,837 INFO L93 Difference]: Finished difference Result 271 states and 332 transitions. [2022-01-10 03:43:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-10 03:43:00,839 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 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 69 [2022-01-10 03:43:00,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:43:00,840 INFO L225 Difference]: With dead ends: 271 [2022-01-10 03:43:00,843 INFO L226 Difference]: Without dead ends: 249 [2022-01-10 03:43:00,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=6910, Invalid=13396, Unknown=0, NotChecked=0, Total=20306 [2022-01-10 03:43:00,847 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 2143 mSDsluCounter, 1843 mSDsCounter, 0 mSdLazyCounter, 4257 mSolverCounterSat, 1266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2143 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 5523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1266 IncrementalHoareTripleChecker+Valid, 4257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-10 03:43:00,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2143 Valid, 1885 Invalid, 5523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1266 Valid, 4257 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-10 03:43:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-10 03:43:00,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 129. [2022-01-10 03:43:00,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 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 03:43:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2022-01-10 03:43:00,857 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 69 [2022-01-10 03:43:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:43:00,858 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2022-01-10 03:43:00,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 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 03:43:00,858 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2022-01-10 03:43:00,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-10 03:43:00,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:43:00,860 INFO L514 BasicCegarLoop]: trace histogram [94, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-10 03:43:00,875 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 03:43:01,060 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 03:43:01,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:43:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:43:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash -594967944, now seen corresponding path program 6 times [2022-01-10 03:43:01,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:43:01,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921569401] [2022-01-10 03:43:01,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-10 03:43:01,062 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:43:01,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:43:01,063 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 03:43:01,065 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 03:43:02,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-01-10 03:43:02,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:43:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-10 03:43:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:43:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4765 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-01-10 03:43:03,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:43:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4765 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-01-10 03:43:04,670 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:43:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921569401] [2022-01-10 03:43:04,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921569401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:43:04,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:43:04,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-01-10 03:43:04,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674247775] [2022-01-10 03:43:04,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:43:04,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-10 03:43:04,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:43:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-10 03:43:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=1926, Unknown=0, NotChecked=0, Total=2652 [2022-01-10 03:43:04,672 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 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)