/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-crafted/zero_sum_const_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-10 03:54:10,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-10 03:54:10,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-10 03:54:10,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-10 03:54:10,156 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-10 03:54:10,157 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-10 03:54:10,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-10 03:54:10,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-10 03:54:10,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-10 03:54:10,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-10 03:54:10,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-10 03:54:10,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-10 03:54:10,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-10 03:54:10,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-10 03:54:10,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-10 03:54:10,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-10 03:54:10,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-10 03:54:10,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-10 03:54:10,185 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-10 03:54:10,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-10 03:54:10,189 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-10 03:54:10,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-10 03:54:10,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-10 03:54:10,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-10 03:54:10,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-10 03:54:10,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-10 03:54:10,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-10 03:54:10,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-10 03:54:10,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-10 03:54:10,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-10 03:54:10,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-10 03:54:10,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-10 03:54:10,199 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-10 03:54:10,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-10 03:54:10,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-10 03:54:10,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-10 03:54:10,201 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-10 03:54:10,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-10 03:54:10,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-10 03:54:10,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-10 03:54:10,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-10 03:54:10,205 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 03:54:10,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-10 03:54:10,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-10 03:54:10,228 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-10 03:54:10,228 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-10 03:54:10,229 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-10 03:54:10,229 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-10 03:54:10,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-10 03:54:10,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-10 03:54:10,229 INFO L138 SettingsManager]: * Use SBE=true [2022-01-10 03:54:10,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-10 03:54:10,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-10 03:54:10,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:54:10,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-10 03:54:10,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-01-10 03:54:10,232 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-10 03:54:10,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-10 03:54:10,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-10 03:54:10,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-10 03:54:10,409 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-10 03:54:10,412 INFO L275 PluginConnector]: CDTParser initialized [2022-01-10 03:54:10,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2022-01-10 03:54:10,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5d5ed41/55bd586b10b3480693a753f09a761de1/FLAG6cc9844ea [2022-01-10 03:54:10,828 INFO L306 CDTParser]: Found 1 translation units. [2022-01-10 03:54:10,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2022-01-10 03:54:10,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5d5ed41/55bd586b10b3480693a753f09a761de1/FLAG6cc9844ea [2022-01-10 03:54:10,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a5d5ed41/55bd586b10b3480693a753f09a761de1 [2022-01-10 03:54:10,843 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-10 03:54:10,844 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-10 03:54:10,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-10 03:54:10,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-10 03:54:10,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-10 03:54:10,849 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:54:10" (1/1) ... [2022-01-10 03:54:10,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36558918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:10, skipping insertion in model container [2022-01-10 03:54:10,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 03:54:10" (1/1) ... [2022-01-10 03:54:10,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-10 03:54:10,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-10 03:54:10,984 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-crafted/zero_sum_const_m4.c[408,421] [2022-01-10 03:54:11,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:54:11,030 INFO L203 MainTranslator]: Completed pre-run [2022-01-10 03:54:11,038 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-crafted/zero_sum_const_m4.c[408,421] [2022-01-10 03:54:11,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-10 03:54:11,055 INFO L208 MainTranslator]: Completed translation [2022-01-10 03:54:11,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11 WrapperNode [2022-01-10 03:54:11,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-10 03:54:11,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-10 03:54:11,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-10 03:54:11,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-10 03:54:11,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,105 INFO L137 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 125 [2022-01-10 03:54:11,105 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-10 03:54:11,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-10 03:54:11,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-10 03:54:11,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-10 03:54:11,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-10 03:54:11,143 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-10 03:54:11,143 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-10 03:54:11,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-10 03:54:11,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (1/1) ... [2022-01-10 03:54:11,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-10 03:54:11,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-10 03:54:11,181 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 03:54:11,192 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 03:54:11,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-10 03:54:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-01-10 03:54:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-01-10 03:54:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-10 03:54:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-10 03:54:11,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-10 03:54:11,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-01-10 03:54:11,270 INFO L234 CfgBuilder]: Building ICFG [2022-01-10 03:54:11,275 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-10 03:54:11,521 INFO L275 CfgBuilder]: Performing block encoding [2022-01-10 03:54:11,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-10 03:54:11,525 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-10 03:54:11,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:54:11 BoogieIcfgContainer [2022-01-10 03:54:11,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-10 03:54:11,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-10 03:54:11,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-10 03:54:11,534 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-10 03:54:11,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 03:54:10" (1/3) ... [2022-01-10 03:54:11,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eafc048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:54:11, skipping insertion in model container [2022-01-10 03:54:11,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 03:54:11" (2/3) ... [2022-01-10 03:54:11,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eafc048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 03:54:11, skipping insertion in model container [2022-01-10 03:54:11,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 03:54:11" (3/3) ... [2022-01-10 03:54:11,540 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2022-01-10 03:54:11,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-10 03:54:11,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-10 03:54:11,591 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-10 03:54:11,595 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 03:54:11,596 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-10 03:54:11,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 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 03:54:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 03:54:11,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:11,609 INFO L514 BasicCegarLoop]: trace histogram [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 03:54:11,609 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:11,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2022-01-10 03:54:11,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698868561] [2022-01-10 03:54:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:54:11,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:11,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:11,622 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 03:54:11,623 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 03:54:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:54:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-10 03:54:11,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:54:11,738 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 03:54:11,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:54:11,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:54:11,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698868561] [2022-01-10 03:54:11,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698868561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:54:11,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:54:11,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-10 03:54:11,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581857249] [2022-01-10 03:54:11,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:54:11,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-10 03:54:11,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:54:11,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-10 03:54:11,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:54:11,763 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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 03:54:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:54:11,774 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2022-01-10 03:54:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-10 03:54:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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 03:54:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:54:11,781 INFO L225 Difference]: With dead ends: 71 [2022-01-10 03:54:11,781 INFO L226 Difference]: Without dead ends: 33 [2022-01-10 03:54:11,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-10 03:54:11,785 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-10 03:54:11,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-10 03:54:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-10 03:54:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-10 03:54:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 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 03:54:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-01-10 03:54:11,807 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2022-01-10 03:54:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:54:11,807 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-01-10 03:54:11,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 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 03:54:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-01-10 03:54:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-10 03:54:11,808 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:11,808 INFO L514 BasicCegarLoop]: trace histogram [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 03:54:11,831 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 03:54:12,015 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 03:54:12,016 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2022-01-10 03:54:12,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:12,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779580934] [2022-01-10 03:54:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:54:12,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:12,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:12,023 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 03:54:12,047 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 03:54:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:54:12,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-10 03:54:12,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:54:12,194 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 03:54:12,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:54:12,195 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:54:12,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779580934] [2022-01-10 03:54:12,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779580934] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:54:12,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:54:12,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:54:12,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475760043] [2022-01-10 03:54:12,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:54:12,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:54:12,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:54:12,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:54:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:54:12,200 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 03:54:12,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:54:12,289 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-01-10 03:54:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:54:12,290 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 03:54:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:54:12,291 INFO L225 Difference]: With dead ends: 52 [2022-01-10 03:54:12,291 INFO L226 Difference]: Without dead ends: 48 [2022-01-10 03:54:12,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:54:12,292 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-10 03:54:12,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 89 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-10 03:54:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-10 03:54:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-10 03:54:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 47 states have internal predecessors, (63), 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 03:54:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2022-01-10 03:54:12,298 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 23 [2022-01-10 03:54:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:54:12,298 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2022-01-10 03:54:12,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 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 03:54:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2022-01-10 03:54:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-10 03:54:12,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:12,301 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 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 03:54:12,307 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 03:54:12,507 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 03:54:12,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:12,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash -807143506, now seen corresponding path program 1 times [2022-01-10 03:54:12,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:12,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474628387] [2022-01-10 03:54:12,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:54:12,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:12,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:12,512 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 03:54:12,513 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 03:54:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:54:12,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:54:12,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:54:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:54:12,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:54:12,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:54:12,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474628387] [2022-01-10 03:54:12,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474628387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:54:12,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:54:12,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-10 03:54:12,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785599041] [2022-01-10 03:54:12,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:54:12,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-10 03:54:12,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:54:12,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-10 03:54:12,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-10 03:54:12,621 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 03:54:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:54:12,797 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2022-01-10 03:54:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-10 03:54:12,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 25 [2022-01-10 03:54:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:54:12,798 INFO L225 Difference]: With dead ends: 93 [2022-01-10 03:54:12,799 INFO L226 Difference]: Without dead ends: 50 [2022-01-10 03:54:12,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:54:12,800 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 41 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:54:12,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 41 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:54:12,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-01-10 03:54:12,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-01-10 03:54:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 states have internal predecessors, (64), 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 03:54:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2022-01-10 03:54:12,804 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 25 [2022-01-10 03:54:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:54:12,805 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2022-01-10 03:54:12,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 03:54:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2022-01-10 03:54:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-10 03:54:12,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:12,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 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 03:54:12,820 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 03:54:13,006 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 03:54:13,006 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:13,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:13,007 INFO L85 PathProgramCache]: Analyzing trace with hash 293663568, now seen corresponding path program 1 times [2022-01-10 03:54:13,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:13,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649326922] [2022-01-10 03:54:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:54:13,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:13,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:13,008 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 03:54:13,009 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 03:54:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:54:13,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-10 03:54:13,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:54:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:54:13,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:54:13,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-10 03:54:13,272 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:54:13,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649326922] [2022-01-10 03:54:13,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649326922] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:54:13,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:54:13,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-01-10 03:54:13,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417398551] [2022-01-10 03:54:13,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:54:13,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-10 03:54:13,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:54:13,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-10 03:54:13,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:54:13,274 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:54:13,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:54:13,552 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2022-01-10 03:54:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-10 03:54:13,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-10 03:54:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:54:13,555 INFO L225 Difference]: With dead ends: 95 [2022-01-10 03:54:13,555 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 03:54:13,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-10 03:54:13,556 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:54:13,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 39 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:54:13,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 03:54:13,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-01-10 03:54:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.32) internal successors, (66), 50 states have internal predecessors, (66), 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 03:54:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2022-01-10 03:54:13,561 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 27 [2022-01-10 03:54:13,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:54:13,561 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2022-01-10 03:54:13,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-10 03:54:13,561 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2022-01-10 03:54:13,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-10 03:54:13,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:13,562 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 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 03:54:13,570 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 03:54:13,768 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 03:54:13,769 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:13,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:13,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1607306866, now seen corresponding path program 2 times [2022-01-10 03:54:13,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:13,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094826113] [2022-01-10 03:54:13,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:54:13,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:13,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:13,771 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 03:54:13,771 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 03:54:13,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-10 03:54:13,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-10 03:54:13,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-10 03:54:13,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:54:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-10 03:54:13,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-10 03:54:13,916 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:54:13,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094826113] [2022-01-10 03:54:13,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094826113] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-10 03:54:13,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-10 03:54:13,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-10 03:54:13,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826169456] [2022-01-10 03:54:13,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-10 03:54:13,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-10 03:54:13,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:54:13,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-10 03:54:13,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-10 03:54:13,918 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 03:54:14,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:54:14,146 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2022-01-10 03:54:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-10 03:54:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 29 [2022-01-10 03:54:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:54:14,148 INFO L225 Difference]: With dead ends: 90 [2022-01-10 03:54:14,148 INFO L226 Difference]: Without dead ends: 52 [2022-01-10 03:54:14,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-10 03:54:14,149 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 100 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-10 03:54:14,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 16 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-10 03:54:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-10 03:54:14,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2022-01-10 03:54:14,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 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 03:54:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-10 03:54:14,154 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 29 [2022-01-10 03:54:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:54:14,154 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-10 03:54:14,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 03:54:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-10 03:54:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-10 03:54:14,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:14,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:54:14,163 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 03:54:14,359 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 03:54:14,360 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 1 times [2022-01-10 03:54:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:14,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297147101] [2022-01-10 03:54:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-10 03:54:14,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:14,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:14,362 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 03:54:14,362 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 03:54:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-10 03:54:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-10 03:54:14,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-10 03:54:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 03:54:14,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-10 03:54:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-10 03:54:14,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-01-10 03:54:14,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297147101] [2022-01-10 03:54:14,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297147101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-10 03:54:14,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-10 03:54:14,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-01-10 03:54:14,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039640965] [2022-01-10 03:54:14,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-10 03:54:14,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-10 03:54:14,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-01-10 03:54:14,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-10 03:54:14,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-01-10 03:54:14,910 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 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 03:54:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-10 03:54:15,735 INFO L93 Difference]: Finished difference Result 149 states and 188 transitions. [2022-01-10 03:54:15,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-10 03:54:15,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 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 03:54:15,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-10 03:54:15,736 INFO L225 Difference]: With dead ends: 149 [2022-01-10 03:54:15,736 INFO L226 Difference]: Without dead ends: 115 [2022-01-10 03:54:15,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-01-10 03:54:15,737 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 223 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-10 03:54:15,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 42 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-10 03:54:15,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-10 03:54:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-01-10 03:54:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.091743119266055) internal successors, (119), 109 states have internal predecessors, (119), 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 03:54:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2022-01-10 03:54:15,746 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 43 [2022-01-10 03:54:15,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-10 03:54:15,746 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2022-01-10 03:54:15,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 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 03:54:15,746 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2022-01-10 03:54:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-10 03:54:15,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-10 03:54:15,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 03:54:15,763 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 03:54:15,960 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 03:54:15,961 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-10 03:54:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-10 03:54:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 2 times [2022-01-10 03:54:15,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-01-10 03:54:15,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526955871] [2022-01-10 03:54:15,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-10 03:54:15,962 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-01-10 03:54:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-01-10 03:54:15,964 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 03:54:15,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process