/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_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bor1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:09:10,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:09:10,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:09:10,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-09 23:09:10,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-09 23:09:10,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-09 23:09:10,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-09 23:09:10,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-09 23:09:10,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-09 23:09:10,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-09 23:09:10,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-09 23:09:10,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-09 23:09:10,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-09 23:09:10,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-09 23:09:10,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-09 23:09:10,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-09 23:09:10,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-09 23:09:10,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-09 23:09:10,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-09 23:09:10,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-09 23:09:10,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-09 23:09:10,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-09 23:09:10,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-09 23:09:10,116 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-09 23:09:10,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-09 23:09:10,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-09 23:09:10,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-09 23:09:10,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-09 23:09:10,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-09 23:09:10,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-09 23:09:10,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-09 23:09:10,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-09 23:09:10,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-09 23:09:10,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-09 23:09:10,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-09 23:09:10,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-09 23:09:10,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-09 23:09:10,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-09 23:09:10,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:09:10,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:09:10,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:09:10,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 23:09:10,157 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:09:10,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:09:10,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:09:10,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:09:10,159 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:09:10,159 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:09:10,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:09:10,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:09:10,159 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:09:10,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:09:10,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:09:10,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:09:10,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:09:10,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:09:10,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:09:10,161 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:09:10,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:09:10,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:09:10,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:09:10,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:09:10,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:09:10,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:09:10,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:09:10,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:09:10,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:09:10,162 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:09:10,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:09:10,163 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:09:10,163 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:09:10,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:09:10,163 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:09:10,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:09:10,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:09:10,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:09:10,372 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:09:10,373 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:09:10,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor1.i [2022-01-09 23:09:10,418 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/732fc971a/6fb1ead7403747f497567ddbbb53032d/FLAG196623d01 [2022-01-09 23:09:10,790 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:09:10,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor1.i [2022-01-09 23:09:10,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/732fc971a/6fb1ead7403747f497567ddbbb53032d/FLAG196623d01 [2022-01-09 23:09:10,812 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/732fc971a/6fb1ead7403747f497567ddbbb53032d [2022-01-09 23:09:10,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:09:10,816 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:09:10,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:09:10,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:09:10,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:09:10,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:09:10" (1/1) ... [2022-01-09 23:09:10,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c930570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:10, skipping insertion in model container [2022-01-09 23:09:10,824 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:09:10" (1/1) ... [2022-01-09 23:09:10,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:09:10,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:09:11,041 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/bor1.i[1285,1298] [2022-01-09 23:09:11,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:09:11,049 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:09:11,077 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/bor1.i[1285,1298] [2022-01-09 23:09:11,079 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:09:11,091 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:09:11,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11 WrapperNode [2022-01-09 23:09:11,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:09:11,093 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:09:11,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:09:11,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:09:11,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,133 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-01-09 23:09:11,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:09:11,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:09:11,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:09:11,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:09:11,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:09:11,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:09:11,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:09:11,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:09:11,168 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (1/1) ... [2022-01-09 23:09:11,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:09:11,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:11,194 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) [2022-01-09 23:09:11,203 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 [2022-01-09 23:09:11,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:09:11,229 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2022-01-09 23:09:11,229 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2022-01-09 23:09:11,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:09:11,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:09:11,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:09:11,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:09:11,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:09:11,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:09:11,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:09:11,303 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:09:11,304 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:09:11,467 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:09:11,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:09:11,471 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-09 23:09:11,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:09:11 BoogieIcfgContainer [2022-01-09 23:09:11,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:09:11,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:09:11,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:09:11,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:09:11,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:09:10" (1/3) ... [2022-01-09 23:09:11,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0189cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:09:11, skipping insertion in model container [2022-01-09 23:09:11,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:09:11" (2/3) ... [2022-01-09 23:09:11,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c0189cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:09:11, skipping insertion in model container [2022-01-09 23:09:11,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:09:11" (3/3) ... [2022-01-09 23:09:11,484 INFO L111 eAbstractionObserver]: Analyzing ICFG bor1.i [2022-01-09 23:09:11,488 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:09:11,488 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:09:11,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:09:11,554 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 [2022-01-09 23:09:11,554 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:09:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-09 23:09:11,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:11,577 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:11,578 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:11,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-01-09 23:09:11,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:11,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370179790] [2022-01-09 23:09:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:11,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:11,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-01-09 23:09:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:11,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-01-09 23:09:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:11,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-01-09 23:09:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 23:09:11,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:11,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370179790] [2022-01-09 23:09:11,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370179790] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:11,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74269818] [2022-01-09 23:09:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:11,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:11,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:11,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:11,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 23:09:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:09:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:09:11,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:09:11,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74269818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:09:11,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:09:11,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-09 23:09:11,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597119847] [2022-01-09 23:09:11,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:09:11,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:09:11,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:11,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:09:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:09:11,961 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:09:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:11,979 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-01-09 23:09:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:09:11,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-09 23:09:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:11,985 INFO L225 Difference]: With dead ends: 50 [2022-01-09 23:09:11,985 INFO L226 Difference]: Without dead ends: 24 [2022-01-09 23:09:11,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:09:11,989 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:11,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-09 23:09:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-01-09 23:09:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-09 23:09:12,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-01-09 23:09:12,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:12,014 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-09 23:09:12,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:09:12,015 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-09 23:09:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-09 23:09:12,016 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:12,016 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:12,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:12,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-09 23:09:12,233 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:12,234 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-01-09 23:09:12,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:12,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931544921] [2022-01-09 23:09:12,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:12,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:09:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-09 23:09:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-01-09 23:09:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:09:12,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:12,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931544921] [2022-01-09 23:09:12,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931544921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:12,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771350501] [2022-01-09 23:09:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:12,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:12,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:12,294 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:12,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 23:09:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:09:12,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:09:12,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:09:12,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771350501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:09:12,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:09:12,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-01-09 23:09:12,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920678821] [2022-01-09 23:09:12,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:09:12,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:09:12,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:09:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:09:12,455 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:09:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:12,470 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-01-09 23:09:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:09:12,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-01-09 23:09:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:12,472 INFO L225 Difference]: With dead ends: 42 [2022-01-09 23:09:12,472 INFO L226 Difference]: Without dead ends: 25 [2022-01-09 23:09:12,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:09:12,474 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:12,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-09 23:09:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-09 23:09:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-09 23:09:12,485 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-01-09 23:09:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:12,485 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-09 23:09:12,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:09:12,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-09 23:09:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-09 23:09:12,486 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:12,486 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:12,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:12,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-09 23:09:12,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:12,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:12,709 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2022-01-09 23:09:12,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:12,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102748741] [2022-01-09 23:09:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:12,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:09:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-09 23:09:12,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-01-09 23:09:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-09 23:09:12,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:12,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102748741] [2022-01-09 23:09:12,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102748741] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:12,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617588417] [2022-01-09 23:09:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:12,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:12,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:12,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:12,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 23:09:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:12,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-01-09 23:09:12,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-01-09 23:09:12,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:09:12,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617588417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:09:12,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:09:12,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-01-09 23:09:12,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155648640] [2022-01-09 23:09:12,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:09:12,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-09 23:09:12,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-09 23:09:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:09:12,934 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:09:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:12,946 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-01-09 23:09:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-09 23:09:12,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-01-09 23:09:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:12,947 INFO L225 Difference]: With dead ends: 39 [2022-01-09 23:09:12,947 INFO L226 Difference]: Without dead ends: 26 [2022-01-09 23:09:12,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-09 23:09:12,951 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:12,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:12,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-09 23:09:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-01-09 23:09:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-01-09 23:09:12,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-01-09 23:09:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:12,970 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-01-09 23:09:12,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:09:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-01-09 23:09:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-09 23:09:12,973 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:12,973 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:12,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:13,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:13,188 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:13,189 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2022-01-09 23:09:13,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:13,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056007686] [2022-01-09 23:09:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:13,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-01-09 23:09:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-01-09 23:09:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-01-09 23:09:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-09 23:09:13,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:13,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056007686] [2022-01-09 23:09:13,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056007686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:13,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463602744] [2022-01-09 23:09:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:13,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:13,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:13,245 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:13,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 23:09:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-09 23:09:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:09:13,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-01-09 23:09:13,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463602744] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:13,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:13,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-09 23:09:13,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307327174] [2022-01-09 23:09:13,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:13,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:09:13,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:13,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:09:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:09:13,419 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:13,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:13,444 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-01-09 23:09:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:09:13,444 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-01-09 23:09:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:13,445 INFO L225 Difference]: With dead ends: 54 [2022-01-09 23:09:13,445 INFO L226 Difference]: Without dead ends: 34 [2022-01-09 23:09:13,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:09:13,446 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:13,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:13,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-09 23:09:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-01-09 23:09:13,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-09 23:09:13,450 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-01-09 23:09:13,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:13,450 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-09 23:09:13,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-09 23:09:13,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-09 23:09:13,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:13,451 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:13,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:13,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:13,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2022-01-09 23:09:13,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:13,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625169444] [2022-01-09 23:09:13,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:13,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-09 23:09:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-01-09 23:09:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-01-09 23:09:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-01-09 23:09:13,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625169444] [2022-01-09 23:09:13,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625169444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976563995] [2022-01-09 23:09:13,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:09:13,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:13,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:13,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:13,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 23:09:13,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:09:13,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:13,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:09:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-09 23:09:13,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-01-09 23:09:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976563995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:14,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:14,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-01-09 23:09:14,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833182515] [2022-01-09 23:09:14,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:14,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:09:14,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:09:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:09:14,030 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-09 23:09:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:14,062 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-01-09 23:09:14,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-09 23:09:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-01-09 23:09:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:14,063 INFO L225 Difference]: With dead ends: 70 [2022-01-09 23:09:14,063 INFO L226 Difference]: Without dead ends: 48 [2022-01-09 23:09:14,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:09:14,064 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:14,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-09 23:09:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-01-09 23:09:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-01-09 23:09:14,068 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-01-09 23:09:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:14,068 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-01-09 23:09:14,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-01-09 23:09:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-01-09 23:09:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-09 23:09:14,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:14,069 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:14,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-09 23:09:14,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:14,285 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:14,286 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2022-01-09 23:09:14,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:14,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040056171] [2022-01-09 23:09:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:14,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:14,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-09 23:09:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:14,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-09 23:09:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:14,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-09 23:09:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:14,381 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-01-09 23:09:14,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:14,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040056171] [2022-01-09 23:09:14,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040056171] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:14,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501539272] [2022-01-09 23:09:14,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:09:14,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:14,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:14,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:14,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 23:09:14,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:09:14,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:14,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:09:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-01-09 23:09:14,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-01-09 23:09:14,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501539272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:14,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:14,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-01-09 23:09:14,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350949002] [2022-01-09 23:09:14,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:14,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 23:09:14,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:14,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 23:09:14,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-09 23:09:14,647 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:14,666 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2022-01-09 23:09:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:09:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-01-09 23:09:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:14,667 INFO L225 Difference]: With dead ends: 78 [2022-01-09 23:09:14,668 INFO L226 Difference]: Without dead ends: 55 [2022-01-09 23:09:14,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-01-09 23:09:14,668 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:14,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-09 23:09:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-01-09 23:09:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-01-09 23:09:14,673 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 64 [2022-01-09 23:09:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:14,674 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-01-09 23:09:14,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-01-09 23:09:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-09 23:09:14,688 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:14,688 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:14,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:14,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:14,889 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 571451455, now seen corresponding path program 4 times [2022-01-09 23:09:14,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:14,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612656178] [2022-01-09 23:09:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:14,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:15,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-09 23:09:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:15,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-09 23:09:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:15,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-01-09 23:09:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:15,037 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-01-09 23:09:15,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:15,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612656178] [2022-01-09 23:09:15,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612656178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:15,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350417806] [2022-01-09 23:09:15,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:09:15,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:15,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:15,039 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:15,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 23:09:15,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:09:15,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:15,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-09 23:09:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-01-09 23:09:15,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-01-09 23:09:15,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350417806] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:15,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:15,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-01-09 23:09:15,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466851411] [2022-01-09 23:09:15,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:15,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-09 23:09:15,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-09 23:09:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:09:15,469 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:15,518 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-01-09 23:09:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-09 23:09:15,518 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 88 [2022-01-09 23:09:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:15,519 INFO L225 Difference]: With dead ends: 111 [2022-01-09 23:09:15,519 INFO L226 Difference]: Without dead ends: 79 [2022-01-09 23:09:15,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-01-09 23:09:15,520 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:15,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 112 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:09:15,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-09 23:09:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-01-09 23:09:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:15,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-01-09 23:09:15,525 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 88 [2022-01-09 23:09:15,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:15,525 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-01-09 23:09:15,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-01-09 23:09:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-09 23:09:15,526 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:15,526 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:15,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:15,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:15,742 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1629281449, now seen corresponding path program 5 times [2022-01-09 23:09:15,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:15,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982498329] [2022-01-09 23:09:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:15,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:15,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-09 23:09:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:16,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-09 23:09:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:16,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-01-09 23:09:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-01-09 23:09:16,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:16,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982498329] [2022-01-09 23:09:16,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982498329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:16,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260243978] [2022-01-09 23:09:16,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:09:16,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:16,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:16,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:16,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 23:09:17,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-01-09 23:09:17,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:17,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:09:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2022-01-09 23:09:17,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-01-09 23:09:17,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260243978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:17,527 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:17,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-01-09 23:09:17,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323890409] [2022-01-09 23:09:17,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:17,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-09 23:09:17,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:17,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-09 23:09:17,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-01-09 23:09:17,529 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:17,615 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2022-01-09 23:09:17,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-09 23:09:17,617 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2022-01-09 23:09:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:17,618 INFO L225 Difference]: With dead ends: 130 [2022-01-09 23:09:17,618 INFO L226 Difference]: Without dead ends: 98 [2022-01-09 23:09:17,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-01-09 23:09:17,619 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:17,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-01-09 23:09:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-01-09 23:09:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-01-09 23:09:17,625 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 112 [2022-01-09 23:09:17,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:17,625 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-01-09 23:09:17,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:17,626 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-01-09 23:09:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-09 23:09:17,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:17,627 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:17,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:17,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-09 23:09:17,844 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1848671305, now seen corresponding path program 6 times [2022-01-09 23:09:17,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:17,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020413273] [2022-01-09 23:09:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:17,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:18,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-09 23:09:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:18,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-09 23:09:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:18,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-01-09 23:09:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2022-01-09 23:09:18,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020413273] [2022-01-09 23:09:18,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020413273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:18,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723209884] [2022-01-09 23:09:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:09:18,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:18,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:18,221 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:18,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 23:09:18,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-09 23:09:18,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:18,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:09:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 850 proven. 4 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2022-01-09 23:09:18,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2022-01-09 23:09:18,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723209884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:18,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:18,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2022-01-09 23:09:18,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565064619] [2022-01-09 23:09:18,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:18,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-09 23:09:18,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:18,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-09 23:09:18,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-01-09 23:09:18,700 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:18,791 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2022-01-09 23:09:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-09 23:09:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 162 [2022-01-09 23:09:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:18,792 INFO L225 Difference]: With dead ends: 156 [2022-01-09 23:09:18,792 INFO L226 Difference]: Without dead ends: 108 [2022-01-09 23:09:18,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-01-09 23:09:18,793 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:18,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-09 23:09:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-01-09 23:09:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-01-09 23:09:18,802 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 162 [2022-01-09 23:09:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:18,802 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-01-09 23:09:18,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-01-09 23:09:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-09 23:09:18,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:18,804 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:18,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:19,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:19,026 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:19,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash -627674557, now seen corresponding path program 7 times [2022-01-09 23:09:19,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:19,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854845268] [2022-01-09 23:09:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:19,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:19,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-01-09 23:09:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:19,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-09 23:09:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:19,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-09 23:09:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:19,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854845268] [2022-01-09 23:09:19,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854845268] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455929332] [2022-01-09 23:09:19,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:09:19,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:19,353 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:19,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 23:09:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:19,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-09 23:09:19,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:19,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:20,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455929332] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:20,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:20,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-01-09 23:09:20,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255845265] [2022-01-09 23:09:20,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:20,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-09 23:09:20,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:20,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-09 23:09:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 23:09:20,418 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:20,534 INFO L93 Difference]: Finished difference Result 215 states and 248 transitions. [2022-01-09 23:09:20,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-09 23:09:20,534 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 172 [2022-01-09 23:09:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:20,535 INFO L225 Difference]: With dead ends: 215 [2022-01-09 23:09:20,535 INFO L226 Difference]: Without dead ends: 159 [2022-01-09 23:09:20,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-01-09 23:09:20,537 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:20,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 112 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:20,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-09 23:09:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-01-09 23:09:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2022-01-09 23:09:20,543 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 172 [2022-01-09 23:09:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:20,544 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2022-01-09 23:09:20,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:20,544 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2022-01-09 23:09:20,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-09 23:09:20,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:20,546 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:20,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:20,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 23:09:20,755 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1171263479, now seen corresponding path program 8 times [2022-01-09 23:09:20,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:20,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170504422] [2022-01-09 23:09:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:20,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-09 23:09:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:21,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-09 23:09:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:21,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-01-09 23:09:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:21,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170504422] [2022-01-09 23:09:21,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170504422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:21,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86443180] [2022-01-09 23:09:21,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:09:21,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:21,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:21,717 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:21,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 23:09:21,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:09:21,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:21,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 52 conjunts are in the unsatisfiable core [2022-01-09 23:09:21,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:22,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-01-09 23:09:24,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86443180] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:24,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:24,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 103 [2022-01-09 23:09:24,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369150494] [2022-01-09 23:09:24,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:24,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-09 23:09:24,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:24,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-09 23:09:24,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2022-01-09 23:09:24,398 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 103 states, 103 states have (on average 2.203883495145631) internal successors, (227), 103 states have internal predecessors, (227), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:24,600 INFO L93 Difference]: Finished difference Result 315 states and 372 transitions. [2022-01-09 23:09:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-09 23:09:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.203883495145631) internal successors, (227), 103 states have internal predecessors, (227), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 224 [2022-01-09 23:09:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:24,601 INFO L225 Difference]: With dead ends: 315 [2022-01-09 23:09:24,601 INFO L226 Difference]: Without dead ends: 259 [2022-01-09 23:09:24,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 403 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2022-01-09 23:09:24,604 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:24,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 178 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-09 23:09:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-01-09 23:09:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 263 transitions. [2022-01-09 23:09:24,614 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 263 transitions. Word has length 224 [2022-01-09 23:09:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:24,615 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 263 transitions. [2022-01-09 23:09:24,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.203883495145631) internal successors, (227), 103 states have internal predecessors, (227), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-01-09 23:09:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 263 transitions. [2022-01-09 23:09:24,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-01-09 23:09:24,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:24,617 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:24,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:24,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-09 23:09:24,834 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 631849435, now seen corresponding path program 9 times [2022-01-09 23:09:24,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:24,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330653585] [2022-01-09 23:09:24,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:24,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:25,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-01-09 23:09:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:25,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2022-01-09 23:09:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:25,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 287 [2022-01-09 23:09:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11899 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 10855 trivial. 0 not checked. [2022-01-09 23:09:25,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:25,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330653585] [2022-01-09 23:09:25,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330653585] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:25,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777228317] [2022-01-09 23:09:25,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:09:25,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:25,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:25,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:25,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 23:09:25,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-01-09 23:09:25,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:25,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:09:25,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11899 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 11013 trivial. 0 not checked. [2022-01-09 23:09:25,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11899 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11863 trivial. 0 not checked. [2022-01-09 23:09:26,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777228317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:26,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:26,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2022-01-09 23:09:26,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259559561] [2022-01-09 23:09:26,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:26,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-09 23:09:26,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-09 23:09:26,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:09:26,163 INFO L87 Difference]: Start difference. First operand 259 states and 263 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:26,232 INFO L93 Difference]: Finished difference Result 333 states and 351 transitions. [2022-01-09 23:09:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-09 23:09:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 324 [2022-01-09 23:09:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:26,234 INFO L225 Difference]: With dead ends: 333 [2022-01-09 23:09:26,234 INFO L226 Difference]: Without dead ends: 278 [2022-01-09 23:09:26,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:09:26,234 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:26,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 214 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:26,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-09 23:09:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-01-09 23:09:26,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0110294117647058) internal successors, (275), 272 states have internal predecessors, (275), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 281 transitions. [2022-01-09 23:09:26,240 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 281 transitions. Word has length 324 [2022-01-09 23:09:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:26,241 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 281 transitions. [2022-01-09 23:09:26,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 281 transitions. [2022-01-09 23:09:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-01-09 23:09:26,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:26,243 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:26,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:09:26,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 23:09:26,460 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:26,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:26,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1343285705, now seen corresponding path program 10 times [2022-01-09 23:09:26,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:26,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145416319] [2022-01-09 23:09:26,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:26,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:26,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-01-09 23:09:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:26,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2022-01-09 23:09:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:26,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 307 [2022-01-09 23:09:26,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12326 backedges. 0 proven. 1193 refuted. 0 times theorem prover too weak. 11133 trivial. 0 not checked. [2022-01-09 23:09:26,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:26,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145416319] [2022-01-09 23:09:26,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145416319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:26,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622154980] [2022-01-09 23:09:26,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:09:26,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:26,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:26,776 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:26,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 23:09:27,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:09:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:09:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-09 23:09:27,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:09:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12326 backedges. 1451 proven. 225 refuted. 0 times theorem prover too weak. 10650 trivial. 0 not checked. [2022-01-09 23:09:27,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:09:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12326 backedges. 484 proven. 709 refuted. 0 times theorem prover too weak. 11133 trivial. 0 not checked. [2022-01-09 23:09:28,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622154980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:09:28,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-09 23:09:28,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2022-01-09 23:09:28,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654302795] [2022-01-09 23:09:28,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-09 23:09:28,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-09 23:09:28,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:09:28,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-09 23:09:28,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:09:28,072 INFO L87 Difference]: Start difference. First operand 277 states and 281 transitions. Second operand has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:09:28,149 INFO L93 Difference]: Finished difference Result 384 states and 410 transitions. [2022-01-09 23:09:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-09 23:09:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 346 [2022-01-09 23:09:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:09:28,152 INFO L225 Difference]: With dead ends: 384 [2022-01-09 23:09:28,153 INFO L226 Difference]: Without dead ends: 311 [2022-01-09 23:09:28,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 682 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:09:28,155 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:09:28,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 134 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:09:28,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-09 23:09:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 311. [2022-01-09 23:09:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0098039215686274) internal successors, (309), 306 states have internal predecessors, (309), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:09:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 315 transitions. [2022-01-09 23:09:28,161 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 315 transitions. Word has length 346 [2022-01-09 23:09:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:09:28,161 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 315 transitions. [2022-01-09 23:09:28,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.676470588235294) internal successors, (91), 34 states have internal predecessors, (91), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-01-09 23:09:28,162 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 315 transitions. [2022-01-09 23:09:28,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-01-09 23:09:28,165 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:09:28,166 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 96, 96, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:09:28,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-09 23:09:28,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-09 23:09:28,383 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:09:28,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:09:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1973643303, now seen corresponding path program 11 times [2022-01-09 23:09:28,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:09:28,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091914665] [2022-01-09 23:09:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:09:28,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:09:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:28,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-01-09 23:09:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:28,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2022-01-09 23:09:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 375 [2022-01-09 23:09:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:09:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 19619 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 14363 trivial. 0 not checked. [2022-01-09 23:09:29,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:09:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091914665] [2022-01-09 23:09:29,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091914665] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:09:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691341736] [2022-01-09 23:09:29,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:09:29,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:09:29,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:09:29,016 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:09:29,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process