/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 20:29:29,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:29:29,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:29:29,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 20:29:29,268 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 20:29:29,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 20:29:29,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 20:29:29,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 20:29:29,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 20:29:29,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 20:29:29,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 20:29:29,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 20:29:29,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 20:29:29,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 20:29:29,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 20:29:29,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 20:29:29,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 20:29:29,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 20:29:29,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 20:29:29,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 20:29:29,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 20:29:29,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 20:29:29,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 20:29:29,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 20:29:29,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-15 20:29:29,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-15 20:29:29,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-15 20:29:29,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-15 20:29:29,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-15 20:29:29,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-15 20:29:29,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:29:29,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:29:29,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:29:29,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 20:29:29,328 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:29:29,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:29:29,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:29:29,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:29:29,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:29:29,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:29:29,330 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:29:29,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:29:29,330 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:29:29,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:29:29,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:29:29,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:29:29,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:29:29,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:29:29,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:29:29,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:29:29,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:29:29,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:29:29,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:29:29,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:29:29,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:29:29,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:29:29,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:29:29,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:29:29,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:29:29,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:29:29,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:29:29,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:29:29,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:29:29,333 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:29:29,333 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:29:29,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:29:29,333 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:29:29,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:29:29,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:29:29,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:29:29,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-15 20:29:29,552 INFO L275 PluginConnector]: CDTParser initialized [2022-03-15 20:29:29,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2022-03-15 20:29:29,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2023013d5/573f9a770ece43fc9df9e187f16fc551/FLAG8711d8fd1 [2022-03-15 20:29:29,957 INFO L306 CDTParser]: Found 1 translation units. [2022-03-15 20:29:29,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2022-03-15 20:29:29,958 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2022-03-15 20:29:29,958 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2022-03-15 20:29:29,958 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2022-03-15 20:29:29,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2023013d5/573f9a770ece43fc9df9e187f16fc551/FLAG8711d8fd1 [2022-03-15 20:29:29,999 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2023013d5/573f9a770ece43fc9df9e187f16fc551 [2022-03-15 20:29:30,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:29:30,002 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-15 20:29:30,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-15 20:29:30,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-15 20:29:30,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-15 20:29:30,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155c721b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30, skipping insertion in model container [2022-03-15 20:29:30,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-15 20:29:30,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-15 20:29:30,174 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 20:29:30,180 INFO L203 MainTranslator]: Completed pre-run [2022-03-15 20:29:30,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-15 20:29:30,201 INFO L208 MainTranslator]: Completed translation [2022-03-15 20:29:30,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30 WrapperNode [2022-03-15 20:29:30,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-15 20:29:30,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:29:30,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:29:30,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:29:30,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,227 INFO L137 Inliner]: procedures = 9, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2022-03-15 20:29:30,227 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:29:30,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:29:30,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:29:30,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:29:30,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:29:30,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:29:30,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:29:30,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:29:30,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (1/1) ... [2022-03-15 20:29:30,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:29:30,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:30,284 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) [2022-03-15 20:29:30,299 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 [2022-03-15 20:29:30,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-15 20:29:30,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:29:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:29:30,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-15 20:29:30,310 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2022-03-15 20:29:30,310 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2022-03-15 20:29:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2022-03-15 20:29:30,311 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2022-03-15 20:29:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-15 20:29:30,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-15 20:29:30,312 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 20:29:30,367 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:29:30,368 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:29:30,501 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:29:30,509 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:29:30,509 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-15 20:29:30,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:29:30 BoogieIcfgContainer [2022-03-15 20:29:30,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:29:30,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:29:30,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:29:30,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:29:30,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.03 08:29:30" (1/3) ... [2022-03-15 20:29:30,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b69650c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:29:30, skipping insertion in model container [2022-03-15 20:29:30,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.03 08:29:30" (2/3) ... [2022-03-15 20:29:30,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b69650c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:29:30, skipping insertion in model container [2022-03-15 20:29:30,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:29:30" (3/3) ... [2022-03-15 20:29:30,524 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2022-03-15 20:29:30,527 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:29:30,528 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:29:30,528 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:29:30,528 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:29:30,567 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,568 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,568 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,568 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,568 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,569 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,569 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,569 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,569 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,569 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,569 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,570 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,570 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,570 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,570 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,570 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,570 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,570 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,571 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,571 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,571 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,571 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,571 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,572 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,572 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,572 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,572 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,572 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,572 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,573 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,573 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,573 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,573 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,573 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,575 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,575 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,575 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,575 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,575 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,575 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,575 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,575 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,576 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,576 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,578 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,578 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,578 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,578 WARN L322 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,578 WARN L322 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,580 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,580 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,580 WARN L322 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,580 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,580 WARN L322 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:29:30,583 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 20:29:30,610 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:29:30,615 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 20:29:30,615 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 20:29:30,622 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:29:30,627 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 64 transitions, 144 flow [2022-03-15 20:29:30,629 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 64 transitions, 144 flow [2022-03-15 20:29:30,630 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 144 flow [2022-03-15 20:29:30,652 INFO L129 PetriNetUnfolder]: 4/62 cut-off events. [2022-03-15 20:29:30,652 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 20:29:30,655 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 62 events. 4/62 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2022-03-15 20:29:30,656 INFO L116 LiptonReduction]: Number of co-enabled transitions 572 [2022-03-15 20:29:31,539 INFO L131 LiptonReduction]: Checked pairs total: 748 [2022-03-15 20:29:31,539 INFO L133 LiptonReduction]: Total number of compositions: 47 [2022-03-15 20:29:31,546 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 20 transitions, 56 flow [2022-03-15 20:29:31,562 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 20:29:31,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:31,568 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:31,568 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1907592160, now seen corresponding path program 1 times [2022-03-15 20:29:31,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:31,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233777499] [2022-03-15 20:29:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:31,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:29:31,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:31,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233777499] [2022-03-15 20:29:31,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233777499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:29:31,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:29:31,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:29:31,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1174576255] [2022-03-15 20:29:31,716 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:31,720 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:31,737 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 57 transitions. [2022-03-15 20:29:31,737 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:31,922 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [177#(< firstIncrementThread1of1ForFork0_~i~0 5)] [2022-03-15 20:29:31,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:29:31,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:29:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:29:31,947 INFO L87 Difference]: Start difference. First operand has 52 states, 51 states have (on average 2.2745098039215685) internal successors, (116), 51 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:31,989 INFO L93 Difference]: Finished difference Result 82 states and 188 transitions. [2022-03-15 20:29:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 20:29:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 20:29:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:31,996 INFO L225 Difference]: With dead ends: 82 [2022-03-15 20:29:31,996 INFO L226 Difference]: Without dead ends: 82 [2022-03-15 20:29:31,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 20:29:31,998 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:31,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:29:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-15 20:29:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-15 20:29:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.3209876543209877) internal successors, (188), 81 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 188 transitions. [2022-03-15 20:29:32,032 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 188 transitions. Word has length 13 [2022-03-15 20:29:32,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:32,032 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 188 transitions. [2022-03-15 20:29:32,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 188 transitions. [2022-03-15 20:29:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 20:29:32,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:32,034 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:32,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:29:32,034 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:32,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:32,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1427477730, now seen corresponding path program 1 times [2022-03-15 20:29:32,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:32,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643655391] [2022-03-15 20:29:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:32,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:32,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 20:29:32,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:32,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643655391] [2022-03-15 20:29:32,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643655391] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:29:32,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:29:32,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:29:32,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [317253661] [2022-03-15 20:29:32,116 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:32,117 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:32,122 INFO L252 McrAutomatonBuilder]: Finished intersection with 66 states and 125 transitions. [2022-03-15 20:29:32,122 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:32,334 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:29:32,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 20:29:32,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 20:29:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:29:32,336 INFO L87 Difference]: Start difference. First operand 82 states and 188 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:32,364 INFO L93 Difference]: Finished difference Result 114 states and 266 transitions. [2022-03-15 20:29:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 20:29:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-15 20:29:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:32,366 INFO L225 Difference]: With dead ends: 114 [2022-03-15 20:29:32,366 INFO L226 Difference]: Without dead ends: 114 [2022-03-15 20:29:32,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:29:32,367 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:32,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:29:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-15 20:29:32,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2022-03-15 20:29:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.3402061855670104) internal successors, (227), 97 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 227 transitions. [2022-03-15 20:29:32,374 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 227 transitions. Word has length 17 [2022-03-15 20:29:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:32,375 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 227 transitions. [2022-03-15 20:29:32,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 227 transitions. [2022-03-15 20:29:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 20:29:32,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:32,376 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:32,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 20:29:32,376 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:32,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:32,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1712175249, now seen corresponding path program 1 times [2022-03-15 20:29:32,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:32,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568610719] [2022-03-15 20:29:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:32,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 20:29:32,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:32,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568610719] [2022-03-15 20:29:32,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568610719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:32,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831674094] [2022-03-15 20:29:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:32,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:32,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:32,409 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) [2022-03-15 20:29:32,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 20:29:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:32,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 20:29:32,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:29:32,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:29:32,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831674094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:32,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:32,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 9 [2022-03-15 20:29:32,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193100895] [2022-03-15 20:29:32,574 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:32,575 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:32,580 INFO L252 McrAutomatonBuilder]: Finished intersection with 68 states and 124 transitions. [2022-03-15 20:29:32,580 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:32,822 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:29:32,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 20:29:32,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 20:29:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:29:32,823 INFO L87 Difference]: Start difference. First operand 98 states and 227 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:32,861 INFO L93 Difference]: Finished difference Result 146 states and 344 transitions. [2022-03-15 20:29:32,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 20:29:32,861 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 20:29:32,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:32,863 INFO L225 Difference]: With dead ends: 146 [2022-03-15 20:29:32,863 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 20:29:32,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-03-15 20:29:32,865 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:32,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:29:32,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 20:29:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 130. [2022-03-15 20:29:32,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.364341085271318) internal successors, (305), 129 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2022-03-15 20:29:32,887 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 19 [2022-03-15 20:29:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:32,888 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2022-03-15 20:29:32,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:32,888 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2022-03-15 20:29:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 20:29:32,889 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:32,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:32,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:33,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:33,089 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:33,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash -428584064, now seen corresponding path program 2 times [2022-03-15 20:29:33,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:33,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255816211] [2022-03-15 20:29:33,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:33,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 20:29:33,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:33,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255816211] [2022-03-15 20:29:33,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255816211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:33,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745341512] [2022-03-15 20:29:33,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:29:33,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:33,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:33,140 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) [2022-03-15 20:29:33,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 20:29:33,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:29:33,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 20:29:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 20:29:33,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 20:29:33,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745341512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:33,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:33,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 20:29:33,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1100435927] [2022-03-15 20:29:33,238 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:33,240 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:33,246 INFO L252 McrAutomatonBuilder]: Finished intersection with 80 states and 148 transitions. [2022-03-15 20:29:33,246 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:33,523 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1389#(or (<= 4 firstIncrementThread1of1ForFork0_~i~0) (< firstIncrementThread1of1ForFork0_~i~0 3)), 1362#(< firstIncrementThread1of1ForFork0_~i~0 5), 1366#(< firstIncrementThread1of1ForFork0_~i~0 4), 1388#(or (< firstIncrementThread1of1ForFork0_~i~0 4) (<= 5 firstIncrementThread1of1ForFork0_~i~0))] [2022-03-15 20:29:33,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 20:29:33,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:33,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 20:29:33,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-03-15 20:29:33,524 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:33,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:33,626 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2022-03-15 20:29:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 20:29:33,626 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 20:29:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:33,627 INFO L225 Difference]: With dead ends: 226 [2022-03-15 20:29:33,627 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 20:29:33,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2022-03-15 20:29:33,629 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:33,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:29:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 20:29:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-03-15 20:29:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3955555555555557) internal successors, (539), 225 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 539 transitions. [2022-03-15 20:29:33,644 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 539 transitions. Word has length 21 [2022-03-15 20:29:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:33,644 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 539 transitions. [2022-03-15 20:29:33,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 539 transitions. [2022-03-15 20:29:33,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 20:29:33,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:33,649 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:33,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:33,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 20:29:33,864 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1343602525, now seen corresponding path program 3 times [2022-03-15 20:29:33,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:33,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89857455] [2022-03-15 20:29:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:33,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-15 20:29:33,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:33,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89857455] [2022-03-15 20:29:33,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89857455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:33,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531253744] [2022-03-15 20:29:33,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 20:29:33,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:33,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:33,907 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) [2022-03-15 20:29:33,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 20:29:33,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 20:29:33,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:33,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 20:29:33,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-15 20:29:33,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-15 20:29:34,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531253744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:34,021 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:34,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 20:29:34,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1468987356] [2022-03-15 20:29:34,022 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:34,024 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:34,039 INFO L252 McrAutomatonBuilder]: Finished intersection with 116 states and 220 transitions. [2022-03-15 20:29:34,039 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:34,382 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:29:34,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 20:29:34,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:34,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 20:29:34,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 20:29:34,383 INFO L87 Difference]: Start difference. First operand 226 states and 539 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:34,418 INFO L93 Difference]: Finished difference Result 310 states and 746 transitions. [2022-03-15 20:29:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 20:29:34,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 20:29:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:34,420 INFO L225 Difference]: With dead ends: 310 [2022-03-15 20:29:34,420 INFO L226 Difference]: Without dead ends: 310 [2022-03-15 20:29:34,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 20:29:34,421 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:34,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:29:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-15 20:29:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 282. [2022-03-15 20:29:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.409252669039146) internal successors, (677), 281 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 677 transitions. [2022-03-15 20:29:34,426 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 677 transitions. Word has length 27 [2022-03-15 20:29:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:34,426 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 677 transitions. [2022-03-15 20:29:34,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 677 transitions. [2022-03-15 20:29:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 20:29:34,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:34,427 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:34,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:34,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:34,636 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:34,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1583773714, now seen corresponding path program 4 times [2022-03-15 20:29:34,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:34,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680563526] [2022-03-15 20:29:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-15 20:29:34,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:34,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680563526] [2022-03-15 20:29:34,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680563526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:34,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230378599] [2022-03-15 20:29:34,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 20:29:34,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:34,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:34,700 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) [2022-03-15 20:29:34,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 20:29:34,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 20:29:34,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:34,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 20:29:34,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:29:34,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 20:29:34,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230378599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:29:34,902 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 20:29:34,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 23 [2022-03-15 20:29:34,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [844993271] [2022-03-15 20:29:34,902 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:34,905 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:34,933 INFO L252 McrAutomatonBuilder]: Finished intersection with 128 states and 244 transitions. [2022-03-15 20:29:34,934 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:35,399 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:29:35,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 20:29:35,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 20:29:35,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-03-15 20:29:35,400 INFO L87 Difference]: Start difference. First operand 282 states and 677 transitions. Second operand has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:35,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:35,974 INFO L93 Difference]: Finished difference Result 811 states and 1945 transitions. [2022-03-15 20:29:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 20:29:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 20:29:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:35,976 INFO L225 Difference]: With dead ends: 811 [2022-03-15 20:29:35,977 INFO L226 Difference]: Without dead ends: 500 [2022-03-15 20:29:35,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 20:29:35,978 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:35,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 20:29:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-03-15 20:29:35,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 342. [2022-03-15 20:29:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.4193548387096775) internal successors, (825), 341 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 825 transitions. [2022-03-15 20:29:35,985 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 825 transitions. Word has length 29 [2022-03-15 20:29:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:35,985 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 825 transitions. [2022-03-15 20:29:35,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 825 transitions. [2022-03-15 20:29:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 20:29:35,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:35,986 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:36,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:36,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:36,199 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:36,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1974130672, now seen corresponding path program 5 times [2022-03-15 20:29:36,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:36,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958343713] [2022-03-15 20:29:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:36,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:36,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:36,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958343713] [2022-03-15 20:29:36,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958343713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:36,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135653594] [2022-03-15 20:29:36,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 20:29:36,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:36,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:36,284 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) [2022-03-15 20:29:36,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 20:29:36,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 20:29:36,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:36,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 20:29:36,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:36,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:36,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135653594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:36,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:36,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-15 20:29:36,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [403925466] [2022-03-15 20:29:36,447 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:36,452 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:36,471 INFO L252 McrAutomatonBuilder]: Finished intersection with 128 states and 240 transitions. [2022-03-15 20:29:36,471 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:36,839 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [4924#(or (<= secondIncrementThread1of1ForFork1_~i~1 2) (<= 4 secondIncrementThread1of1ForFork1_~i~1)), 4926#(or (<= secondIncrementThread1of1ForFork1_~i~1 2) (<= 5 secondIncrementThread1of1ForFork1_~i~1)), 4927#(or (<= secondIncrementThread1of1ForFork1_~i~1 1) (<= 5 secondIncrementThread1of1ForFork1_~i~1)), 4925#(or (<= secondIncrementThread1of1ForFork1_~i~1 1) (<= 3 secondIncrementThread1of1ForFork1_~i~1)), 4856#(< secondIncrementThread1of1ForFork1_~i~1 5), 4923#(or (<= secondIncrementThread1of1ForFork1_~i~1 3) (<= 5 secondIncrementThread1of1ForFork1_~i~1))] [2022-03-15 20:29:36,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 20:29:36,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:36,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 20:29:36,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-15 20:29:36,840 INFO L87 Difference]: Start difference. First operand 342 states and 825 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:36,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:36,908 INFO L93 Difference]: Finished difference Result 548 states and 1334 transitions. [2022-03-15 20:29:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 20:29:36,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 20:29:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:36,911 INFO L225 Difference]: With dead ends: 548 [2022-03-15 20:29:36,911 INFO L226 Difference]: Without dead ends: 548 [2022-03-15 20:29:36,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-03-15 20:29:36,912 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:36,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:29:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-03-15 20:29:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 530. [2022-03-15 20:29:36,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.440453686200378) internal successors, (1291), 529 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1291 transitions. [2022-03-15 20:29:36,921 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1291 transitions. Word has length 29 [2022-03-15 20:29:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:36,922 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1291 transitions. [2022-03-15 20:29:36,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:36,923 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1291 transitions. [2022-03-15 20:29:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 20:29:36,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:36,926 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:36,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:37,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:37,142 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1592989074, now seen corresponding path program 6 times [2022-03-15 20:29:37,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:37,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992945390] [2022-03-15 20:29:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:37,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:29:37,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:37,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992945390] [2022-03-15 20:29:37,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992945390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:37,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105567232] [2022-03-15 20:29:37,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 20:29:37,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:37,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:37,320 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) [2022-03-15 20:29:37,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 20:29:37,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 20:29:37,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:37,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 20:29:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:29:37,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:29:37,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105567232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:37,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:37,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-03-15 20:29:37,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [26155964] [2022-03-15 20:29:37,671 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:37,675 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:37,693 INFO L252 McrAutomatonBuilder]: Finished intersection with 160 states and 304 transitions. [2022-03-15 20:29:37,693 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:38,327 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [6576#(<= 0 firstIncrementThread1of1ForFork0_~localx~0), 6560#(<= 0 ~x~0)] [2022-03-15 20:29:38,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 20:29:38,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:38,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 20:29:38,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1185, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 20:29:38,328 INFO L87 Difference]: Start difference. First operand 530 states and 1291 transitions. Second operand has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:38,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:38,982 INFO L93 Difference]: Finished difference Result 1462 states and 3513 transitions. [2022-03-15 20:29:38,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 20:29:38,982 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 20:29:38,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:38,985 INFO L225 Difference]: With dead ends: 1462 [2022-03-15 20:29:38,985 INFO L226 Difference]: Without dead ends: 724 [2022-03-15 20:29:38,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1069, Invalid=2591, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 20:29:38,986 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 186 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:38,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 0 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 20:29:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-15 20:29:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 510. [2022-03-15 20:29:38,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.4263261296660117) internal successors, (1235), 509 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:38,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1235 transitions. [2022-03-15 20:29:38,996 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1235 transitions. Word has length 33 [2022-03-15 20:29:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:38,997 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 1235 transitions. [2022-03-15 20:29:38,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1235 transitions. [2022-03-15 20:29:38,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 20:29:38,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:38,998 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:39,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:39,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:39,208 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash 795398736, now seen corresponding path program 7 times [2022-03-15 20:29:39,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:39,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556999011] [2022-03-15 20:29:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:39,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:39,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:29:39,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:39,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556999011] [2022-03-15 20:29:39,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556999011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:39,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306826994] [2022-03-15 20:29:39,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 20:29:39,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:39,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:39,361 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) [2022-03-15 20:29:39,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 20:29:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 20:29:39,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:29:39,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 20:29:39,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306826994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:39,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:39,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-03-15 20:29:39,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [195382695] [2022-03-15 20:29:39,683 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:39,685 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:39,706 INFO L252 McrAutomatonBuilder]: Finished intersection with 180 states and 336 transitions. [2022-03-15 20:29:39,706 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:40,275 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [9331#(<= 0 firstIncrementThread1of1ForFork0_~localx~0), 9315#(<= 0 ~x~0)] [2022-03-15 20:29:40,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 20:29:40,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 20:29:40,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 20:29:40,276 INFO L87 Difference]: Start difference. First operand 510 states and 1235 transitions. Second operand has 21 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:40,810 INFO L93 Difference]: Finished difference Result 1710 states and 4105 transitions. [2022-03-15 20:29:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 20:29:40,811 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 20:29:40,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:40,813 INFO L225 Difference]: With dead ends: 1710 [2022-03-15 20:29:40,813 INFO L226 Difference]: Without dead ends: 696 [2022-03-15 20:29:40,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=867, Invalid=2103, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 20:29:40,814 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 177 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:40,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 0 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 20:29:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-15 20:29:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 490. [2022-03-15 20:29:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.411042944785276) internal successors, (1179), 489 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1179 transitions. [2022-03-15 20:29:40,823 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1179 transitions. Word has length 33 [2022-03-15 20:29:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:40,824 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1179 transitions. [2022-03-15 20:29:40,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.4) internal successors, (108), 20 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1179 transitions. [2022-03-15 20:29:40,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 20:29:40,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:40,825 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:40,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:41,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:41,035 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:41,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:41,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1771419214, now seen corresponding path program 8 times [2022-03-15 20:29:41,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:41,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871686905] [2022-03-15 20:29:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:41,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 20:29:41,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:41,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871686905] [2022-03-15 20:29:41,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871686905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:41,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685995437] [2022-03-15 20:29:41,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 20:29:41,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:41,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:41,155 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) [2022-03-15 20:29:41,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 20:29:41,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 20:29:41,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:41,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 20:29:41,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 20:29:41,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-15 20:29:41,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685995437] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:41,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:41,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-03-15 20:29:41,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1442527364] [2022-03-15 20:29:41,441 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:41,444 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:41,468 INFO L252 McrAutomatonBuilder]: Finished intersection with 200 states and 368 transitions. [2022-03-15 20:29:41,468 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:42,115 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [12286#(<= 0 firstIncrementThread1of1ForFork0_~localx~0), 12270#(<= 0 ~x~0)] [2022-03-15 20:29:42,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 20:29:42,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:42,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 20:29:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-03-15 20:29:42,116 INFO L87 Difference]: Start difference. First operand 490 states and 1179 transitions. Second operand has 19 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:42,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:42,567 INFO L93 Difference]: Finished difference Result 2046 states and 4917 transitions. [2022-03-15 20:29:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 20:29:42,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 20:29:42,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:42,570 INFO L225 Difference]: With dead ends: 2046 [2022-03-15 20:29:42,570 INFO L226 Difference]: Without dead ends: 668 [2022-03-15 20:29:42,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=689, Invalid=1663, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 20:29:42,571 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 163 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:42,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 0 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 20:29:42,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-15 20:29:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 470. [2022-03-15 20:29:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.394456289978678) internal successors, (1123), 469 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1123 transitions. [2022-03-15 20:29:42,580 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1123 transitions. Word has length 33 [2022-03-15 20:29:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:42,580 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1123 transitions. [2022-03-15 20:29:42,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1123 transitions. [2022-03-15 20:29:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 20:29:42,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:42,581 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:42,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:42,781 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,SelfDestructingSolverStorable9 [2022-03-15 20:29:42,782 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1122726036, now seen corresponding path program 9 times [2022-03-15 20:29:42,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:42,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563989505] [2022-03-15 20:29:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:42,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:42,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:42,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563989505] [2022-03-15 20:29:42,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563989505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:42,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519514873] [2022-03-15 20:29:42,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 20:29:42,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:42,895 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) [2022-03-15 20:29:42,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 20:29:42,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 20:29:42,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:42,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 20:29:42,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:43,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:43,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519514873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:43,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:43,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-03-15 20:29:43,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1850521012] [2022-03-15 20:29:43,144 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:43,147 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:43,172 INFO L252 McrAutomatonBuilder]: Finished intersection with 220 states and 400 transitions. [2022-03-15 20:29:43,172 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:43,932 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [15513#(<= 0 ~x~0), 15529#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2022-03-15 20:29:43,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 20:29:43,933 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:43,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 20:29:43,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-03-15 20:29:43,933 INFO L87 Difference]: Start difference. First operand 470 states and 1123 transitions. Second operand has 17 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:44,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:44,461 INFO L93 Difference]: Finished difference Result 2387 states and 5734 transitions. [2022-03-15 20:29:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 20:29:44,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 20:29:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:44,469 INFO L225 Difference]: With dead ends: 2387 [2022-03-15 20:29:44,469 INFO L226 Difference]: Without dead ends: 2158 [2022-03-15 20:29:44,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=880, Invalid=1876, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 20:29:44,471 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 178 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:44,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 0 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 20:29:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2022-03-15 20:29:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 714. [2022-03-15 20:29:44,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.420757363253857) internal successors, (1726), 713 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1726 transitions. [2022-03-15 20:29:44,490 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1726 transitions. Word has length 33 [2022-03-15 20:29:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:44,491 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 1726 transitions. [2022-03-15 20:29:44,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.5) internal successors, (88), 16 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1726 transitions. [2022-03-15 20:29:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 20:29:44,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:44,492 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:44,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:44,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:44,707 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:44,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1565517626, now seen corresponding path program 10 times [2022-03-15 20:29:44,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:44,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646379344] [2022-03-15 20:29:44,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:44,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:44,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:44,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646379344] [2022-03-15 20:29:44,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646379344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:44,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661710065] [2022-03-15 20:29:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 20:29:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:44,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:44,757 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) [2022-03-15 20:29:44,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 20:29:44,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 20:29:44,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:44,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 20:29:44,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:44,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:44,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661710065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:44,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:44,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-15 20:29:44,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1009133478] [2022-03-15 20:29:44,934 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:44,938 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:44,954 INFO L252 McrAutomatonBuilder]: Finished intersection with 120 states and 191 transitions. [2022-03-15 20:29:44,954 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:45,129 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [19594#(<= 0 ~x~0), 19610#(<= 0 firstIncrementThread1of1ForFork0_~localx~0)] [2022-03-15 20:29:45,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 20:29:45,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 20:29:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-15 20:29:45,130 INFO L87 Difference]: Start difference. First operand 714 states and 1726 transitions. Second operand has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:45,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:45,300 INFO L93 Difference]: Finished difference Result 1127 states and 2701 transitions. [2022-03-15 20:29:45,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 20:29:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 20:29:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:45,302 INFO L225 Difference]: With dead ends: 1127 [2022-03-15 20:29:45,302 INFO L226 Difference]: Without dead ends: 640 [2022-03-15 20:29:45,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-03-15 20:29:45,303 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:45,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 20:29:45,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-03-15 20:29:45,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 450. [2022-03-15 20:29:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.376391982182628) internal successors, (1067), 449 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1067 transitions. [2022-03-15 20:29:45,311 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1067 transitions. Word has length 33 [2022-03-15 20:29:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:45,311 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1067 transitions. [2022-03-15 20:29:45,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1067 transitions. [2022-03-15 20:29:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 20:29:45,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:45,312 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:45,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:45,526 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,SelfDestructingSolverStorable11 [2022-03-15 20:29:45,527 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:45,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:45,527 INFO L85 PathProgramCache]: Analyzing trace with hash -742496522, now seen corresponding path program 11 times [2022-03-15 20:29:45,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:45,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123776153] [2022-03-15 20:29:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:45,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:45,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:45,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123776153] [2022-03-15 20:29:45,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123776153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:45,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190093109] [2022-03-15 20:29:45,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 20:29:45,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:45,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:45,607 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) [2022-03-15 20:29:45,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 20:29:45,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 20:29:45,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:45,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 20:29:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:45,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-15 20:29:45,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190093109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:45,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:45,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-15 20:29:45,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [783244075] [2022-03-15 20:29:45,804 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:45,807 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:45,837 INFO L252 McrAutomatonBuilder]: Finished intersection with 242 states and 437 transitions. [2022-03-15 20:29:45,837 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:46,670 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21875#(<= 0 secondIncrementThread1of1ForFork1_~localx~1)] [2022-03-15 20:29:46,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 20:29:46,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 20:29:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-03-15 20:29:46,671 INFO L87 Difference]: Start difference. First operand 450 states and 1067 transitions. Second operand has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:46,943 INFO L93 Difference]: Finished difference Result 951 states and 2285 transitions. [2022-03-15 20:29:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 20:29:46,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 20:29:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:46,946 INFO L225 Difference]: With dead ends: 951 [2022-03-15 20:29:46,946 INFO L226 Difference]: Without dead ends: 886 [2022-03-15 20:29:46,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2022-03-15 20:29:46,947 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:46,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:29:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-03-15 20:29:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 562. [2022-03-15 20:29:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.4313725490196076) internal successors, (1364), 561 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1364 transitions. [2022-03-15 20:29:46,957 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1364 transitions. Word has length 33 [2022-03-15 20:29:46,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:46,957 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1364 transitions. [2022-03-15 20:29:46,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1364 transitions. [2022-03-15 20:29:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 20:29:46,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:46,958 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:46,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:47,171 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,SelfDestructingSolverStorable12 [2022-03-15 20:29:47,171 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash 893604500, now seen corresponding path program 12 times [2022-03-15 20:29:47,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:47,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278651285] [2022-03-15 20:29:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:47,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:47,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:47,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278651285] [2022-03-15 20:29:47,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278651285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:47,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836295319] [2022-03-15 20:29:47,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 20:29:47,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:47,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:47,266 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) [2022-03-15 20:29:47,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 20:29:47,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 20:29:47,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 20:29:47,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 20:29:47,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:47,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:47,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836295319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:47,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:47,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-03-15 20:29:47,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1504198690] [2022-03-15 20:29:47,490 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:47,492 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:47,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 114 states and 202 transitions. [2022-03-15 20:29:47,505 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:47,800 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:29:47,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 20:29:47,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:47,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 20:29:47,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-03-15 20:29:47,801 INFO L87 Difference]: Start difference. First operand 562 states and 1364 transitions. Second operand has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:48,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:48,139 INFO L93 Difference]: Finished difference Result 1783 states and 4354 transitions. [2022-03-15 20:29:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 20:29:48,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 20:29:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:48,142 INFO L225 Difference]: With dead ends: 1783 [2022-03-15 20:29:48,142 INFO L226 Difference]: Without dead ends: 722 [2022-03-15 20:29:48,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=524, Invalid=1282, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 20:29:48,143 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:48,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:29:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-15 20:29:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 490. [2022-03-15 20:29:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.425357873210634) internal successors, (1186), 489 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:48,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1186 transitions. [2022-03-15 20:29:48,153 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1186 transitions. Word has length 33 [2022-03-15 20:29:48,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:48,153 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1186 transitions. [2022-03-15 20:29:48,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:48,153 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1186 transitions. [2022-03-15 20:29:48,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 20:29:48,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:29:48,154 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:29:48,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:48,367 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,SelfDestructingSolverStorable13 [2022-03-15 20:29:48,367 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:29:48,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:29:48,368 INFO L85 PathProgramCache]: Analyzing trace with hash 110986900, now seen corresponding path program 13 times [2022-03-15 20:29:48,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:29:48,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010336302] [2022-03-15 20:29:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:29:48,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:29:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:48,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:29:48,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010336302] [2022-03-15 20:29:48,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010336302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 20:29:48,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927700575] [2022-03-15 20:29:48,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 20:29:48,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 20:29:48,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:29:48,453 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) [2022-03-15 20:29:48,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 20:29:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:29:48,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 20:29:48,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 20:29:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:48,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 20:29:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-03-15 20:29:48,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927700575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 20:29:48,673 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 20:29:48,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2022-03-15 20:29:48,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [245861082] [2022-03-15 20:29:48,674 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:29:48,676 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:29:48,692 INFO L252 McrAutomatonBuilder]: Finished intersection with 128 states and 225 transitions. [2022-03-15 20:29:48,692 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:29:49,040 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:29:49,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 20:29:49,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:29:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 20:29:49,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-03-15 20:29:49,041 INFO L87 Difference]: Start difference. First operand 490 states and 1186 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:29:49,327 INFO L93 Difference]: Finished difference Result 1141 states and 2765 transitions. [2022-03-15 20:29:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 20:29:49,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 20:29:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:29:49,327 INFO L225 Difference]: With dead ends: 1141 [2022-03-15 20:29:49,327 INFO L226 Difference]: Without dead ends: 0 [2022-03-15 20:29:49,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=450, Invalid=1032, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 20:29:49,328 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 20:29:49,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 20:29:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-15 20:29:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-15 20:29:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:49,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-15 20:29:49,331 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2022-03-15 20:29:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:29:49,331 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-15 20:29:49,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 20:29:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-15 20:29:49,332 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-15 20:29:49,333 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 20:29:49,333 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 20:29:49,334 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 20:29:49,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 20:29:49,539 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,SelfDestructingSolverStorable14 [2022-03-15 20:29:49,541 INFO L732 BasicCegarLoop]: Path program histogram: [13, 1, 1] [2022-03-15 20:29:49,543 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 20:29:49,543 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 20:29:49,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 08:29:49 BasicIcfg [2022-03-15 20:29:49,544 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 20:29:49,545 INFO L158 Benchmark]: Toolchain (without parser) took 19542.40ms. Allocated memory was 191.9MB in the beginning and 362.8MB in the end (delta: 170.9MB). Free memory was 134.6MB in the beginning and 153.1MB in the end (delta: -18.4MB). Peak memory consumption was 152.4MB. Max. memory is 8.0GB. [2022-03-15 20:29:49,545 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory was 152.6MB in the beginning and 152.6MB in the end (delta: 54.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:29:49,545 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.41ms. Allocated memory was 191.9MB in the beginning and 247.5MB in the end (delta: 55.6MB). Free memory was 134.5MB in the beginning and 218.5MB in the end (delta: -84.0MB). Peak memory consumption was 4.9MB. Max. memory is 8.0GB. [2022-03-15 20:29:49,545 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.33ms. Allocated memory is still 247.5MB. Free memory was 218.5MB in the beginning and 216.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:29:49,545 INFO L158 Benchmark]: Boogie Preprocessor took 28.06ms. Allocated memory is still 247.5MB. Free memory was 216.9MB in the beginning and 215.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:29:49,545 INFO L158 Benchmark]: RCFGBuilder took 254.12ms. Allocated memory is still 247.5MB. Free memory was 215.8MB in the beginning and 204.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-15 20:29:49,546 INFO L158 Benchmark]: TraceAbstraction took 19032.59ms. Allocated memory was 247.5MB in the beginning and 362.8MB in the end (delta: 115.3MB). Free memory was 203.8MB in the beginning and 153.1MB in the end (delta: 50.7MB). Peak memory consumption was 165.5MB. Max. memory is 8.0GB. [2022-03-15 20:29:49,547 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 191.9MB. Free memory was 152.6MB in the beginning and 152.6MB in the end (delta: 54.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.41ms. Allocated memory was 191.9MB in the beginning and 247.5MB in the end (delta: 55.6MB). Free memory was 134.5MB in the beginning and 218.5MB in the end (delta: -84.0MB). Peak memory consumption was 4.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.33ms. Allocated memory is still 247.5MB. Free memory was 218.5MB in the beginning and 216.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.06ms. Allocated memory is still 247.5MB. Free memory was 216.9MB in the beginning and 215.8MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 254.12ms. Allocated memory is still 247.5MB. Free memory was 215.8MB in the beginning and 204.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 19032.59ms. Allocated memory was 247.5MB in the beginning and 362.8MB in the end (delta: 115.3MB). Free memory was 203.8MB in the beginning and 153.1MB in the end (delta: 50.7MB). Peak memory consumption was 165.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.9s, 67 PlacesBefore, 25 PlacesAfterwards, 64 TransitionsBefore, 20 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 5 FixpointIterations, 24 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 47 TotalNumberOfCompositions, 748 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 609, positive: 587, positive conditional: 0, positive unconditional: 587, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 302, positive: 293, positive conditional: 0, positive unconditional: 293, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 609, positive: 294, positive conditional: 0, positive unconditional: 294, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 302, unknown conditional: 0, unknown unconditional: 302] , Statistics on independence cache: Total cache size (in pairs): 29, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 83 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 18.9s, OverallIterations: 15, TraceHistogramMax: 5, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1335 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1335 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3695 mSDsCounter, 378 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7430 IncrementalHoareTripleChecker+Invalid, 7808 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 378 mSolverCounterUnsat, 0 mSDtfsCounter, 7430 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2455 GetRequests, 2035 SyntacticMatches, 6 SemanticMatches, 414 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=714occurred in iteration=11, InterpolantAutomatonStates: 242, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 3044 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 808 NumberOfCodeBlocks, 788 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1128 ConstructedInterpolants, 0 QuantifiedInterpolants, 3192 SizeOfPredicates, 116 NumberOfNonLiveVariables, 1696 ConjunctsInSsa, 151 ConjunctsInUnsatCore, 40 InterpolantComputations, 3 PerfectInterpolantSequences, 1069/1500 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-15 20:29:49,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...