/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/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.error.function.in.sv-comp.mode false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 11:57:59,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-16 11:57:59,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-16 11:57:59,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-16 11:57:59,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-16 11:57:59,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-16 11:57:59,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-16 11:57:59,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-16 11:57:59,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-16 11:57:59,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-16 11:57:59,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-16 11:57:59,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-16 11:57:59,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 11:57:59,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 11:57:59,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 11:57:59,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 11:57:59,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 11:57:59,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 11:57:59,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 11:57:59,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 11:57:59,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 11:57:59,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 11:57:59,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 11:57:59,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 11:57:59,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-16 11:57:59,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-16 11:57:59,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-16 11:57:59,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-16 11:57:59,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-16 11:57:59,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-16 11:57:59,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-16 11:57:59,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-16 11:57:59,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-16 11:57:59,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-16 11:57:59,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-16 11:57:59,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-16 11:57:59,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-16 11:57:59,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-16 11:57:59,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 11:57:59,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 11:57:59,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 11:57:59,256 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-16 11:57:59,283 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 11:57:59,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 11:57:59,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 11:57:59,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 11:57:59,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 11:57:59,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 11:57:59,285 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 11:57:59,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 11:57:59,285 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 11:57:59,286 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 11:57:59,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 11:57:59,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 11:57:59,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 11:57:59,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 11:57:59,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 11:57:59,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 11:57:59,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 11:57:59,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 11:57:59,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 11:57:59,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 11:57:59,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 11:57:59,288 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 11:57:59,288 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-16 11:57:59,288 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 11:57:59,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 11:57:59,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 11:57:59,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 11:57:59,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 11:57:59,550 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 11:57:59,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2022-09-16 11:57:59,608 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0c40ab6/a5a0472e493c413f92634384af01f01f/FLAGd9d372fcc [2022-09-16 11:58:00,008 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 11:58:00,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c [2022-09-16 11:58:00,015 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0c40ab6/a5a0472e493c413f92634384af01f01f/FLAGd9d372fcc [2022-09-16 11:58:00,026 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f0c40ab6/a5a0472e493c413f92634384af01f01f [2022-09-16 11:58:00,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 11:58:00,029 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 11:58:00,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 11:58:00,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 11:58:00,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 11:58:00,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56131607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00, skipping insertion in model container [2022-09-16 11:58:00,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 11:58:00,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 11:58:00,326 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-09-16 11:58:00,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 11:58:00,344 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 11:58:00,382 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-inc-subseq.wvr.c[2924,2937] [2022-09-16 11:58:00,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 11:58:00,401 INFO L208 MainTranslator]: Completed translation [2022-09-16 11:58:00,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00 WrapperNode [2022-09-16 11:58:00,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 11:58:00,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 11:58:00,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 11:58:00,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 11:58:00,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,445 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 11, calls inlined = 13, statements flattened = 201 [2022-09-16 11:58:00,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 11:58:00,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 11:58:00,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 11:58:00,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 11:58:00,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 11:58:00,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 11:58:00,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 11:58:00,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 11:58:00,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (1/1) ... [2022-09-16 11:58:00,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 11:58:00,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:00,503 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) [2022-09-16 11:58:00,509 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 [2022-09-16 11:58:00,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 11:58:00,535 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-16 11:58:00,535 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-16 11:58:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-16 11:58:00,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-16 11:58:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 11:58:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 11:58:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 11:58:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-16 11:58:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-16 11:58:00,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-16 11:58:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 11:58:00,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 11:58:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-16 11:58:00,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 11:58:00,538 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-16 11:58:00,613 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 11:58:00,614 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 11:58:00,922 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 11:58:01,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 11:58:01,031 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-09-16 11:58:01,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 11:58:01 BoogieIcfgContainer [2022-09-16 11:58:01,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 11:58:01,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 11:58:01,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 11:58:01,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 11:58:01,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 11:58:00" (1/3) ... [2022-09-16 11:58:01,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e55390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 11:58:01, skipping insertion in model container [2022-09-16 11:58:01,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:58:00" (2/3) ... [2022-09-16 11:58:01,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e55390 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 11:58:01, skipping insertion in model container [2022-09-16 11:58:01,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 11:58:01" (3/3) ... [2022-09-16 11:58:01,045 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-inc-subseq.wvr.c [2022-09-16 11:58:01,062 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 11:58:01,062 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-09-16 11:58:01,062 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 11:58:01,179 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-09-16 11:58:01,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 202 transitions, 420 flow [2022-09-16 11:58:01,315 INFO L130 PetriNetUnfolder]: 15/200 cut-off events. [2022-09-16 11:58:01,316 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-09-16 11:58:01,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 200 events. 15/200 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 154 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 164. Up to 2 conditions per place. [2022-09-16 11:58:01,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 202 transitions, 420 flow [2022-09-16 11:58:01,331 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 181 transitions, 371 flow [2022-09-16 11:58:01,342 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 11:58:01,348 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2e54faae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 11:58:01,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-09-16 11:58:01,362 INFO L130 PetriNetUnfolder]: 3/73 cut-off events. [2022-09-16 11:58:01,362 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 11:58:01,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:01,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:01,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1028364021, now seen corresponding path program 1 times [2022-09-16 11:58:01,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:01,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762298840] [2022-09-16 11:58:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:01,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:01,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:01,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:01,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762298840] [2022-09-16 11:58:01,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762298840] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:58:01,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:58:01,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:58:01,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430868844] [2022-09-16 11:58:01,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:58:01,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:58:01,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:58:01,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:58:01,787 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 202 [2022-09-16 11:58:01,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 181 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 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) [2022-09-16 11:58:01,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:01,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 202 [2022-09-16 11:58:01,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:02,037 INFO L130 PetriNetUnfolder]: 65/374 cut-off events. [2022-09-16 11:58:02,038 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-09-16 11:58:02,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 374 events. 65/374 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1067 event pairs, 28 based on Foata normal form. 28/326 useless extension candidates. Maximal degree in co-relation 281. Up to 78 conditions per place. [2022-09-16 11:58:02,045 INFO L137 encePairwiseOnDemand]: 178/202 looper letters, 52 selfloop transitions, 9 changer transitions 5/197 dead transitions. [2022-09-16 11:58:02,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 197 transitions, 534 flow [2022-09-16 11:58:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:58:02,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:58:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 853 transitions. [2022-09-16 11:58:02,068 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8445544554455445 [2022-09-16 11:58:02,069 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 853 transitions. [2022-09-16 11:58:02,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 853 transitions. [2022-09-16 11:58:02,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:02,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 853 transitions. [2022-09-16 11:58:02,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 170.6) internal successors, (853), 5 states have internal predecessors, (853), 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) [2022-09-16 11:58:02,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 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) [2022-09-16 11:58:02,091 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 202.0) internal successors, (1212), 6 states have internal predecessors, (1212), 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) [2022-09-16 11:58:02,093 INFO L175 Difference]: Start difference. First operand has 174 places, 181 transitions, 371 flow. Second operand 5 states and 853 transitions. [2022-09-16 11:58:02,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 197 transitions, 534 flow [2022-09-16 11:58:02,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 197 transitions, 524 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-09-16 11:58:02,105 INFO L231 Difference]: Finished difference. Result has 176 places, 172 transitions, 401 flow [2022-09-16 11:58:02,107 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=401, PETRI_PLACES=176, PETRI_TRANSITIONS=172} [2022-09-16 11:58:02,112 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 2 predicate places. [2022-09-16 11:58:02,112 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 172 transitions, 401 flow [2022-09-16 11:58:02,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 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) [2022-09-16 11:58:02,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:02,114 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:02,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-16 11:58:02,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:02,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1880780099, now seen corresponding path program 1 times [2022-09-16 11:58:02,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:02,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792753092] [2022-09-16 11:58:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:02,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:02,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:02,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792753092] [2022-09-16 11:58:02,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792753092] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:58:02,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371655778] [2022-09-16 11:58:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:02,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:02,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:02,285 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) [2022-09-16 11:58:02,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-09-16 11:58:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:02,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:58:02,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:58:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:02,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:58:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:02,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371655778] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:58:02,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:58:02,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-09-16 11:58:02,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888763897] [2022-09-16 11:58:02,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:58:02,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-16 11:58:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-16 11:58:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-09-16 11:58:02,568 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 202 [2022-09-16 11:58:02,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 172 transitions, 401 flow. Second operand has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 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) [2022-09-16 11:58:02,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:02,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 202 [2022-09-16 11:58:02,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:02,987 INFO L130 PetriNetUnfolder]: 161/807 cut-off events. [2022-09-16 11:58:02,987 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2022-09-16 11:58:02,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 807 events. 161/807 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3514 event pairs, 70 based on Foata normal form. 6/648 useless extension candidates. Maximal degree in co-relation 812. Up to 71 conditions per place. [2022-09-16 11:58:02,996 INFO L137 encePairwiseOnDemand]: 187/202 looper letters, 106 selfloop transitions, 40 changer transitions 0/277 dead transitions. [2022-09-16 11:58:02,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 277 transitions, 969 flow [2022-09-16 11:58:02,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-16 11:58:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-16 11:58:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2924 transitions. [2022-09-16 11:58:03,002 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8041804180418042 [2022-09-16 11:58:03,002 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2924 transitions. [2022-09-16 11:58:03,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2924 transitions. [2022-09-16 11:58:03,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:03,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2924 transitions. [2022-09-16 11:58:03,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 162.44444444444446) internal successors, (2924), 18 states have internal predecessors, (2924), 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) [2022-09-16 11:58:03,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 202.0) internal successors, (3838), 19 states have internal predecessors, (3838), 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) [2022-09-16 11:58:03,019 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 202.0) internal successors, (3838), 19 states have internal predecessors, (3838), 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) [2022-09-16 11:58:03,019 INFO L175 Difference]: Start difference. First operand has 176 places, 172 transitions, 401 flow. Second operand 18 states and 2924 transitions. [2022-09-16 11:58:03,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 277 transitions, 969 flow [2022-09-16 11:58:03,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 277 transitions, 964 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 11:58:03,029 INFO L231 Difference]: Finished difference. Result has 191 places, 199 transitions, 634 flow [2022-09-16 11:58:03,030 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=634, PETRI_PLACES=191, PETRI_TRANSITIONS=199} [2022-09-16 11:58:03,031 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 17 predicate places. [2022-09-16 11:58:03,031 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 199 transitions, 634 flow [2022-09-16 11:58:03,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 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) [2022-09-16 11:58:03,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:03,033 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:03,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-09-16 11:58:03,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:03,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1825358548, now seen corresponding path program 1 times [2022-09-16 11:58:03,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:03,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513405808] [2022-09-16 11:58:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:03,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:03,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:03,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:03,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513405808] [2022-09-16 11:58:03,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513405808] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:58:03,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000881907] [2022-09-16 11:58:03,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:03,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:03,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:03,365 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) [2022-09-16 11:58:03,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-09-16 11:58:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:58:03,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:58:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:03,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:58:03,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000881907] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:58:03,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:58:03,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 11:58:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453208211] [2022-09-16 11:58:03,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:58:03,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 11:58:03,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:03,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 11:58:03,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 11:58:03,476 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 202 [2022-09-16 11:58:03,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 199 transitions, 634 flow. Second operand has 6 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 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) [2022-09-16 11:58:03,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:03,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 202 [2022-09-16 11:58:03,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:03,714 INFO L130 PetriNetUnfolder]: 161/799 cut-off events. [2022-09-16 11:58:03,714 INFO L131 PetriNetUnfolder]: For 136/136 co-relation queries the response was YES. [2022-09-16 11:58:03,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1313 conditions, 799 events. 161/799 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3473 event pairs, 70 based on Foata normal form. 8/642 useless extension candidates. Maximal degree in co-relation 1021. Up to 240 conditions per place. [2022-09-16 11:58:03,722 INFO L137 encePairwiseOnDemand]: 191/202 looper letters, 53 selfloop transitions, 27 changer transitions 0/211 dead transitions. [2022-09-16 11:58:03,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 211 transitions, 788 flow [2022-09-16 11:58:03,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 11:58:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 11:58:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1139 transitions. [2022-09-16 11:58:03,725 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8055162659123055 [2022-09-16 11:58:03,725 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1139 transitions. [2022-09-16 11:58:03,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1139 transitions. [2022-09-16 11:58:03,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:03,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1139 transitions. [2022-09-16 11:58:03,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 162.71428571428572) internal successors, (1139), 7 states have internal predecessors, (1139), 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) [2022-09-16 11:58:03,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 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) [2022-09-16 11:58:03,731 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 202.0) internal successors, (1616), 8 states have internal predecessors, (1616), 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) [2022-09-16 11:58:03,731 INFO L175 Difference]: Start difference. First operand has 191 places, 199 transitions, 634 flow. Second operand 7 states and 1139 transitions. [2022-09-16 11:58:03,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 211 transitions, 788 flow [2022-09-16 11:58:03,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 211 transitions, 714 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-09-16 11:58:03,740 INFO L231 Difference]: Finished difference. Result has 186 places, 191 transitions, 560 flow [2022-09-16 11:58:03,741 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=186, PETRI_TRANSITIONS=191} [2022-09-16 11:58:03,742 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 12 predicate places. [2022-09-16 11:58:03,742 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 191 transitions, 560 flow [2022-09-16 11:58:03,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 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) [2022-09-16 11:58:03,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:03,743 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:03,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-09-16 11:58:03,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-09-16 11:58:03,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash 648881931, now seen corresponding path program 2 times [2022-09-16 11:58:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:03,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983736265] [2022-09-16 11:58:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:03,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:04,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983736265] [2022-09-16 11:58:04,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983736265] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:58:04,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617934194] [2022-09-16 11:58:04,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:58:04,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:04,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:04,099 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) [2022-09-16 11:58:04,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-09-16 11:58:04,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:58:04,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:58:04,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 11:58:04,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:58:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-09-16 11:58:04,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:58:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-09-16 11:58:04,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617934194] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:58:04,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:58:04,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-09-16 11:58:04,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942304653] [2022-09-16 11:58:04,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:58:04,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 11:58:04,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:04,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 11:58:04,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-09-16 11:58:04,475 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 202 [2022-09-16 11:58:04,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 191 transitions, 560 flow. Second operand has 18 states, 18 states have (on average 142.61111111111111) internal successors, (2567), 18 states have internal predecessors, (2567), 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) [2022-09-16 11:58:04,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:04,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 202 [2022-09-16 11:58:04,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:05,580 INFO L130 PetriNetUnfolder]: 141/913 cut-off events. [2022-09-16 11:58:05,581 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2022-09-16 11:58:05,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1453 conditions, 913 events. 141/913 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4038 event pairs, 49 based on Foata normal form. 4/798 useless extension candidates. Maximal degree in co-relation 942. Up to 51 conditions per place. [2022-09-16 11:58:05,586 INFO L137 encePairwiseOnDemand]: 180/202 looper letters, 128 selfloop transitions, 65 changer transitions 2/309 dead transitions. [2022-09-16 11:58:05,586 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 309 transitions, 1265 flow [2022-09-16 11:58:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-09-16 11:58:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-09-16 11:58:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 7022 transitions. [2022-09-16 11:58:05,599 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7094362497474237 [2022-09-16 11:58:05,600 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 7022 transitions. [2022-09-16 11:58:05,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 7022 transitions. [2022-09-16 11:58:05,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:05,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 7022 transitions. [2022-09-16 11:58:05,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 143.30612244897958) internal successors, (7022), 49 states have internal predecessors, (7022), 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) [2022-09-16 11:58:05,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 202.0) internal successors, (10100), 50 states have internal predecessors, (10100), 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) [2022-09-16 11:58:05,636 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 202.0) internal successors, (10100), 50 states have internal predecessors, (10100), 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) [2022-09-16 11:58:05,636 INFO L175 Difference]: Start difference. First operand has 186 places, 191 transitions, 560 flow. Second operand 49 states and 7022 transitions. [2022-09-16 11:58:05,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 309 transitions, 1265 flow [2022-09-16 11:58:05,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 309 transitions, 1222 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-16 11:58:05,642 INFO L231 Difference]: Finished difference. Result has 230 places, 212 transitions, 767 flow [2022-09-16 11:58:05,643 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=767, PETRI_PLACES=230, PETRI_TRANSITIONS=212} [2022-09-16 11:58:05,643 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 56 predicate places. [2022-09-16 11:58:05,644 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 212 transitions, 767 flow [2022-09-16 11:58:05,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 142.61111111111111) internal successors, (2567), 18 states have internal predecessors, (2567), 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) [2022-09-16 11:58:05,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:05,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:05,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-09-16 11:58:05,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:05,859 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:05,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:05,860 INFO L85 PathProgramCache]: Analyzing trace with hash -200794340, now seen corresponding path program 1 times [2022-09-16 11:58:05,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:05,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758448069] [2022-09-16 11:58:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:05,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:05,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:05,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758448069] [2022-09-16 11:58:05,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758448069] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:58:05,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:58:05,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-16 11:58:05,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732828114] [2022-09-16 11:58:05,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:58:05,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-16 11:58:05,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:05,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-16 11:58:05,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-16 11:58:05,946 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 202 [2022-09-16 11:58:05,947 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 212 transitions, 767 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2022-09-16 11:58:05,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:05,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 202 [2022-09-16 11:58:05,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:06,213 INFO L130 PetriNetUnfolder]: 491/1956 cut-off events. [2022-09-16 11:58:06,213 INFO L131 PetriNetUnfolder]: For 194/243 co-relation queries the response was YES. [2022-09-16 11:58:06,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3225 conditions, 1956 events. 491/1956 cut-off events. For 194/243 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 12106 event pairs, 119 based on Foata normal form. 0/1711 useless extension candidates. Maximal degree in co-relation 2948. Up to 519 conditions per place. [2022-09-16 11:58:06,227 INFO L137 encePairwiseOnDemand]: 198/202 looper letters, 20 selfloop transitions, 2 changer transitions 6/223 dead transitions. [2022-09-16 11:58:06,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 223 transitions, 844 flow [2022-09-16 11:58:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-16 11:58:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-16 11:58:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2022-09-16 11:58:06,229 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8927392739273927 [2022-09-16 11:58:06,229 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2022-09-16 11:58:06,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2022-09-16 11:58:06,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:06,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2022-09-16 11:58:06,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 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) [2022-09-16 11:58:06,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2022-09-16 11:58:06,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 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) [2022-09-16 11:58:06,233 INFO L175 Difference]: Start difference. First operand has 230 places, 212 transitions, 767 flow. Second operand 3 states and 541 transitions. [2022-09-16 11:58:06,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 223 transitions, 844 flow [2022-09-16 11:58:06,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 223 transitions, 761 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-09-16 11:58:06,239 INFO L231 Difference]: Finished difference. Result has 216 places, 209 transitions, 689 flow [2022-09-16 11:58:06,239 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=689, PETRI_PLACES=216, PETRI_TRANSITIONS=209} [2022-09-16 11:58:06,240 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 42 predicate places. [2022-09-16 11:58:06,240 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 209 transitions, 689 flow [2022-09-16 11:58:06,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 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) [2022-09-16 11:58:06,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:06,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:06,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-16 11:58:06,241 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:06,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:06,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1961196920, now seen corresponding path program 1 times [2022-09-16 11:58:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50855310] [2022-09-16 11:58:06,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:06,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:06,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:06,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50855310] [2022-09-16 11:58:06,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50855310] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:58:06,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513369658] [2022-09-16 11:58:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:06,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:06,298 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) [2022-09-16 11:58:06,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-09-16 11:58:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:06,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-16 11:58:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:58:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-09-16 11:58:06,561 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:58:06,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513369658] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:58:06,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:58:06,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3] total 9 [2022-09-16 11:58:06,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053541383] [2022-09-16 11:58:06,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:58:06,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 11:58:06,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 11:58:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-09-16 11:58:06,564 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 202 [2022-09-16 11:58:06,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 209 transitions, 689 flow. Second operand has 7 states, 7 states have (on average 147.71428571428572) internal successors, (1034), 7 states have internal predecessors, (1034), 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) [2022-09-16 11:58:06,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:06,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 202 [2022-09-16 11:58:06,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:06,821 INFO L130 PetriNetUnfolder]: 303/1536 cut-off events. [2022-09-16 11:58:06,821 INFO L131 PetriNetUnfolder]: For 227/227 co-relation queries the response was YES. [2022-09-16 11:58:06,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 1536 events. 303/1536 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 8800 event pairs, 180 based on Foata normal form. 4/1389 useless extension candidates. Maximal degree in co-relation 2261. Up to 575 conditions per place. [2022-09-16 11:58:06,831 INFO L137 encePairwiseOnDemand]: 192/202 looper letters, 69 selfloop transitions, 13 changer transitions 7/216 dead transitions. [2022-09-16 11:58:06,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 216 transitions, 882 flow [2022-09-16 11:58:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-16 11:58:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-16 11:58:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1204 transitions. [2022-09-16 11:58:06,834 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.745049504950495 [2022-09-16 11:58:06,834 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1204 transitions. [2022-09-16 11:58:06,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1204 transitions. [2022-09-16 11:58:06,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:06,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1204 transitions. [2022-09-16 11:58:06,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 150.5) internal successors, (1204), 8 states have internal predecessors, (1204), 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) [2022-09-16 11:58:06,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 202.0) internal successors, (1818), 9 states have internal predecessors, (1818), 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) [2022-09-16 11:58:06,840 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 202.0) internal successors, (1818), 9 states have internal predecessors, (1818), 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) [2022-09-16 11:58:06,840 INFO L175 Difference]: Start difference. First operand has 216 places, 209 transitions, 689 flow. Second operand 8 states and 1204 transitions. [2022-09-16 11:58:06,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 216 transitions, 882 flow [2022-09-16 11:58:06,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 216 transitions, 880 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 11:58:06,845 INFO L231 Difference]: Finished difference. Result has 218 places, 207 transitions, 707 flow [2022-09-16 11:58:06,846 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=707, PETRI_PLACES=218, PETRI_TRANSITIONS=207} [2022-09-16 11:58:06,846 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 44 predicate places. [2022-09-16 11:58:06,847 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 207 transitions, 707 flow [2022-09-16 11:58:06,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 147.71428571428572) internal successors, (1034), 7 states have internal predecessors, (1034), 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) [2022-09-16 11:58:06,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:06,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:06,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-09-16 11:58:07,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:07,060 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:07,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1232119876, now seen corresponding path program 1 times [2022-09-16 11:58:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:07,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527076135] [2022-09-16 11:58:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 11:58:07,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527076135] [2022-09-16 11:58:07,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527076135] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:58:07,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235038846] [2022-09-16 11:58:07,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:07,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:07,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:07,147 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) [2022-09-16 11:58:07,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-09-16 11:58:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:07,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 9 conjunts are in the unsatisfiable core [2022-09-16 11:58:07,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:58:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:07,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:58:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:07,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235038846] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:58:07,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:58:07,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 10, 10] total 19 [2022-09-16 11:58:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205679540] [2022-09-16 11:58:07,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:58:07,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-16 11:58:07,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:07,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-16 11:58:07,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-09-16 11:58:07,815 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 202 [2022-09-16 11:58:07,830 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 207 transitions, 707 flow. Second operand has 19 states, 19 states have (on average 138.68421052631578) internal successors, (2635), 19 states have internal predecessors, (2635), 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) [2022-09-16 11:58:07,831 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:07,831 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 202 [2022-09-16 11:58:07,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:08,348 INFO L130 PetriNetUnfolder]: 406/1606 cut-off events. [2022-09-16 11:58:08,348 INFO L131 PetriNetUnfolder]: For 258/258 co-relation queries the response was YES. [2022-09-16 11:58:08,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 1606 events. 406/1606 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 8888 event pairs, 72 based on Foata normal form. 4/1484 useless extension candidates. Maximal degree in co-relation 2593. Up to 260 conditions per place. [2022-09-16 11:58:08,361 INFO L137 encePairwiseOnDemand]: 186/202 looper letters, 92 selfloop transitions, 32 changer transitions 16/247 dead transitions. [2022-09-16 11:58:08,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 247 transitions, 1090 flow [2022-09-16 11:58:08,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-09-16 11:58:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-09-16 11:58:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2239 transitions. [2022-09-16 11:58:08,369 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.692759900990099 [2022-09-16 11:58:08,369 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2239 transitions. [2022-09-16 11:58:08,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2239 transitions. [2022-09-16 11:58:08,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:08,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2239 transitions. [2022-09-16 11:58:08,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 139.9375) internal successors, (2239), 16 states have internal predecessors, (2239), 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) [2022-09-16 11:58:08,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 202.0) internal successors, (3434), 17 states have internal predecessors, (3434), 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) [2022-09-16 11:58:08,383 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 202.0) internal successors, (3434), 17 states have internal predecessors, (3434), 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) [2022-09-16 11:58:08,383 INFO L175 Difference]: Start difference. First operand has 218 places, 207 transitions, 707 flow. Second operand 16 states and 2239 transitions. [2022-09-16 11:58:08,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 247 transitions, 1090 flow [2022-09-16 11:58:08,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 247 transitions, 1056 flow, removed 4 selfloop flow, removed 7 redundant places. [2022-09-16 11:58:08,393 INFO L231 Difference]: Finished difference. Result has 228 places, 208 transitions, 765 flow [2022-09-16 11:58:08,393 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=765, PETRI_PLACES=228, PETRI_TRANSITIONS=208} [2022-09-16 11:58:08,395 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 54 predicate places. [2022-09-16 11:58:08,395 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 208 transitions, 765 flow [2022-09-16 11:58:08,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 138.68421052631578) internal successors, (2635), 19 states have internal predecessors, (2635), 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) [2022-09-16 11:58:08,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:08,396 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:08,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-09-16 11:58:08,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:08,612 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:08,613 INFO L85 PathProgramCache]: Analyzing trace with hash -976529380, now seen corresponding path program 2 times [2022-09-16 11:58:08,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:08,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513245651] [2022-09-16 11:58:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:08,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 11:58:08,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:08,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513245651] [2022-09-16 11:58:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513245651] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:58:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409881478] [2022-09-16 11:58:08,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:58:08,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:08,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:08,696 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) [2022-09-16 11:58:08,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-09-16 11:58:08,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:58:08,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:58:08,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:58:08,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:58:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-09-16 11:58:08,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:58:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-09-16 11:58:09,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409881478] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:58:09,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:58:09,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-09-16 11:58:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908112265] [2022-09-16 11:58:09,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:58:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-09-16 11:58:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-09-16 11:58:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-09-16 11:58:09,071 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 202 [2022-09-16 11:58:09,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 208 transitions, 765 flow. Second operand has 8 states, 8 states have (on average 168.125) internal successors, (1345), 8 states have internal predecessors, (1345), 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) [2022-09-16 11:58:09,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:09,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 202 [2022-09-16 11:58:09,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:09,365 INFO L130 PetriNetUnfolder]: 503/1812 cut-off events. [2022-09-16 11:58:09,366 INFO L131 PetriNetUnfolder]: For 464/464 co-relation queries the response was YES. [2022-09-16 11:58:09,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3391 conditions, 1812 events. 503/1812 cut-off events. For 464/464 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 10670 event pairs, 60 based on Foata normal form. 0/1697 useless extension candidates. Maximal degree in co-relation 3100. Up to 220 conditions per place. [2022-09-16 11:58:09,376 INFO L137 encePairwiseOnDemand]: 195/202 looper letters, 9 selfloop transitions, 4 changer transitions 85/237 dead transitions. [2022-09-16 11:58:09,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 237 transitions, 951 flow [2022-09-16 11:58:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-09-16 11:58:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-09-16 11:58:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1528 transitions. [2022-09-16 11:58:09,379 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8404840484048405 [2022-09-16 11:58:09,379 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1528 transitions. [2022-09-16 11:58:09,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1528 transitions. [2022-09-16 11:58:09,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:09,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1528 transitions. [2022-09-16 11:58:09,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 169.77777777777777) internal successors, (1528), 9 states have internal predecessors, (1528), 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) [2022-09-16 11:58:09,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 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) [2022-09-16 11:58:09,385 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 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) [2022-09-16 11:58:09,385 INFO L175 Difference]: Start difference. First operand has 228 places, 208 transitions, 765 flow. Second operand 9 states and 1528 transitions. [2022-09-16 11:58:09,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 237 transitions, 951 flow [2022-09-16 11:58:09,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 237 transitions, 892 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-09-16 11:58:09,392 INFO L231 Difference]: Finished difference. Result has 222 places, 152 transitions, 581 flow [2022-09-16 11:58:09,393 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=581, PETRI_PLACES=222, PETRI_TRANSITIONS=152} [2022-09-16 11:58:09,394 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 48 predicate places. [2022-09-16 11:58:09,394 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 152 transitions, 581 flow [2022-09-16 11:58:09,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 168.125) internal successors, (1345), 8 states have internal predecessors, (1345), 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) [2022-09-16 11:58:09,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:09,395 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:09,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-09-16 11:58:09,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:09,612 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:09,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:09,612 INFO L85 PathProgramCache]: Analyzing trace with hash -387241114, now seen corresponding path program 1 times [2022-09-16 11:58:09,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:09,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735591737] [2022-09-16 11:58:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:09,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:09,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735591737] [2022-09-16 11:58:09,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735591737] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:58:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711224777] [2022-09-16 11:58:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:09,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:09,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:09,768 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) [2022-09-16 11:58:09,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-09-16 11:58:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:09,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2022-09-16 11:58:09,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:58:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:09,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:58:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:10,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711224777] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:58:10,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:58:10,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-09-16 11:58:10,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106283470] [2022-09-16 11:58:10,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:58:10,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-09-16 11:58:10,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:10,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-09-16 11:58:10,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-09-16 11:58:10,203 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 202 [2022-09-16 11:58:10,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 152 transitions, 581 flow. Second operand has 32 states, 32 states have (on average 157.28125) internal successors, (5033), 32 states have internal predecessors, (5033), 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) [2022-09-16 11:58:10,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:10,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 202 [2022-09-16 11:58:10,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:10,981 INFO L130 PetriNetUnfolder]: 16/493 cut-off events. [2022-09-16 11:58:10,982 INFO L131 PetriNetUnfolder]: For 454/454 co-relation queries the response was YES. [2022-09-16 11:58:10,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1102 conditions, 493 events. 16/493 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 795 event pairs, 0 based on Foata normal form. 8/501 useless extension candidates. Maximal degree in co-relation 1087. Up to 37 conditions per place. [2022-09-16 11:58:10,984 INFO L137 encePairwiseOnDemand]: 190/202 looper letters, 140 selfloop transitions, 102 changer transitions 0/331 dead transitions. [2022-09-16 11:58:10,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 331 transitions, 1844 flow [2022-09-16 11:58:10,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-09-16 11:58:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-09-16 11:58:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 7026 transitions. [2022-09-16 11:58:10,994 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7905040504050405 [2022-09-16 11:58:10,994 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 7026 transitions. [2022-09-16 11:58:10,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 7026 transitions. [2022-09-16 11:58:10,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:10,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 7026 transitions. [2022-09-16 11:58:11,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 159.6818181818182) internal successors, (7026), 44 states have internal predecessors, (7026), 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) [2022-09-16 11:58:11,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 202.0) internal successors, (9090), 45 states have internal predecessors, (9090), 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) [2022-09-16 11:58:11,023 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 202.0) internal successors, (9090), 45 states have internal predecessors, (9090), 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) [2022-09-16 11:58:11,023 INFO L175 Difference]: Start difference. First operand has 222 places, 152 transitions, 581 flow. Second operand 44 states and 7026 transitions. [2022-09-16 11:58:11,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 331 transitions, 1844 flow [2022-09-16 11:58:11,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 331 transitions, 1835 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-16 11:58:11,032 INFO L231 Difference]: Finished difference. Result has 214 places, 212 transitions, 1241 flow [2022-09-16 11:58:11,033 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1241, PETRI_PLACES=214, PETRI_TRANSITIONS=212} [2022-09-16 11:58:11,033 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 40 predicate places. [2022-09-16 11:58:11,033 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 212 transitions, 1241 flow [2022-09-16 11:58:11,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 157.28125) internal successors, (5033), 32 states have internal predecessors, (5033), 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) [2022-09-16 11:58:11,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:58:11,035 INFO L208 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:58:11,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-09-16 11:58:11,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:11,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2022-09-16 11:58:11,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:58:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1952033434, now seen corresponding path program 2 times [2022-09-16 11:58:11,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:58:11,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799406586] [2022-09-16 11:58:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:58:11,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:58:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:58:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:58:11,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:58:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799406586] [2022-09-16 11:58:11,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799406586] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:58:11,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423402767] [2022-09-16 11:58:11,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:58:11,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:58:11,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:58:11,687 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) [2022-09-16 11:58:11,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-09-16 11:58:11,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:58:11,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:58:11,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 11:58:11,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:58:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2022-09-16 11:58:12,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:58:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 833 trivial. 0 not checked. [2022-09-16 11:58:12,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423402767] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:58:12,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:58:12,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 7, 7] total 37 [2022-09-16 11:58:12,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129045266] [2022-09-16 11:58:12,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:58:12,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-09-16 11:58:12,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:58:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-09-16 11:58:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2022-09-16 11:58:12,353 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 202 [2022-09-16 11:58:12,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 212 transitions, 1241 flow. Second operand has 38 states, 38 states have (on average 137.97368421052633) internal successors, (5243), 38 states have internal predecessors, (5243), 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) [2022-09-16 11:58:12,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:58:12,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 202 [2022-09-16 11:58:12,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:58:15,165 INFO L130 PetriNetUnfolder]: 18/541 cut-off events. [2022-09-16 11:58:15,165 INFO L131 PetriNetUnfolder]: For 984/984 co-relation queries the response was YES. [2022-09-16 11:58:15,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1408 conditions, 541 events. 18/541 cut-off events. For 984/984 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 905 event pairs, 0 based on Foata normal form. 2/543 useless extension candidates. Maximal degree in co-relation 1386. Up to 42 conditions per place. [2022-09-16 11:58:15,167 INFO L137 encePairwiseOnDemand]: 184/202 looper letters, 0 selfloop transitions, 0 changer transitions 367/367 dead transitions. [2022-09-16 11:58:15,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 367 transitions, 2456 flow [2022-09-16 11:58:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-09-16 11:58:15,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2022-09-16 11:58:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 16113 transitions. [2022-09-16 11:58:15,197 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.6759942943446887 [2022-09-16 11:58:15,198 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 16113 transitions. [2022-09-16 11:58:15,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 16113 transitions. [2022-09-16 11:58:15,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:58:15,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 16113 transitions. [2022-09-16 11:58:15,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 119 states, 118 states have (on average 136.55084745762713) internal successors, (16113), 118 states have internal predecessors, (16113), 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) [2022-09-16 11:58:15,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 119 states, 119 states have (on average 202.0) internal successors, (24038), 119 states have internal predecessors, (24038), 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) [2022-09-16 11:58:15,291 INFO L81 ComplementDD]: Finished complementDD. Result has 119 states, 119 states have (on average 202.0) internal successors, (24038), 119 states have internal predecessors, (24038), 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) [2022-09-16 11:58:15,291 INFO L175 Difference]: Start difference. First operand has 214 places, 212 transitions, 1241 flow. Second operand 118 states and 16113 transitions. [2022-09-16 11:58:15,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 367 transitions, 2456 flow [2022-09-16 11:58:15,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 367 transitions, 2333 flow, removed 3 selfloop flow, removed 29 redundant places. [2022-09-16 11:58:15,302 INFO L231 Difference]: Finished difference. Result has 301 places, 0 transitions, 0 flow [2022-09-16 11:58:15,303 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=0, PETRI_PLACES=301, PETRI_TRANSITIONS=0} [2022-09-16 11:58:15,304 INFO L287 CegarLoopForPetriNet]: 174 programPoint places, 127 predicate places. [2022-09-16 11:58:15,304 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 0 transitions, 0 flow [2022-09-16 11:58:15,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 137.97368421052633) internal successors, (5243), 38 states have internal predecessors, (5243), 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) [2022-09-16 11:58:15,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 18 remaining) [2022-09-16 11:58:15,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2022-09-16 11:58:15,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2022-09-16 11:58:15,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2022-09-16 11:58:15,309 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2022-09-16 11:58:15,310 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2022-09-16 11:58:15,311 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2022-09-16 11:58:15,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-09-16 11:58:15,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-09-16 11:58:15,520 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1] [2022-09-16 11:58:15,525 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-16 11:58:15,525 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-16 11:58:15,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 11:58:15 BasicIcfg [2022-09-16 11:58:15,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-16 11:58:15,536 INFO L158 Benchmark]: Toolchain (without parser) took 15505.86ms. Allocated memory was 174.1MB in the beginning and 251.7MB in the end (delta: 77.6MB). Free memory was 117.8MB in the beginning and 127.0MB in the end (delta: -9.2MB). Peak memory consumption was 68.6MB. Max. memory is 8.0GB. [2022-09-16 11:58:15,536 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 174.1MB. Free memory is still 134.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-16 11:58:15,536 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.88ms. Allocated memory is still 174.1MB. Free memory was 117.6MB in the beginning and 148.0MB in the end (delta: -30.4MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2022-09-16 11:58:15,536 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.21ms. Allocated memory is still 174.1MB. Free memory was 148.0MB in the beginning and 145.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-16 11:58:15,537 INFO L158 Benchmark]: Boogie Preprocessor took 26.78ms. Allocated memory is still 174.1MB. Free memory was 145.7MB in the beginning and 144.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-16 11:58:15,537 INFO L158 Benchmark]: RCFGBuilder took 562.44ms. Allocated memory is still 174.1MB. Free memory was 144.1MB in the beginning and 117.4MB in the end (delta: 26.7MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. [2022-09-16 11:58:15,537 INFO L158 Benchmark]: TraceAbstraction took 14496.46ms. Allocated memory was 174.1MB in the beginning and 251.7MB in the end (delta: 77.6MB). Free memory was 116.6MB in the beginning and 127.0MB in the end (delta: -10.5MB). Peak memory consumption was 67.9MB. Max. memory is 8.0GB. [2022-09-16 11:58:15,539 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 174.1MB. Free memory is still 134.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 369.88ms. Allocated memory is still 174.1MB. Free memory was 117.6MB in the beginning and 148.0MB in the end (delta: -30.4MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 41.21ms. Allocated memory is still 174.1MB. Free memory was 148.0MB in the beginning and 145.7MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.78ms. Allocated memory is still 174.1MB. Free memory was 145.7MB in the beginning and 144.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 562.44ms. Allocated memory is still 174.1MB. Free memory was 144.1MB in the beginning and 117.4MB in the end (delta: 26.7MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. * TraceAbstraction took 14496.46ms. Allocated memory was 174.1MB in the beginning and 251.7MB in the end (delta: 77.6MB). Free memory was 116.6MB in the beginning and 127.0MB in the end (delta: -10.5MB). Peak memory consumption was 67.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 53]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 53]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 58]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 73]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 73]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 117]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 117]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 117]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 117]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 218 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 14.3s, OverallIterations: 10, TraceHistogramMax: 15, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 7.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2550 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2550 mSDsluCounter, 519 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 636 mSDsCounter, 637 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2028 IncrementalHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 637 mSolverCounterUnsat, 111 mSDtfsCounter, 2028 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2080 GetRequests, 1712 SyntacticMatches, 14 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10300 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1241occurred in iteration=9, InterpolantAutomatonStates: 277, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 2128 NumberOfCodeBlocks, 1938 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 2895 ConstructedInterpolants, 0 QuantifiedInterpolants, 7387 SizeOfPredicates, 47 NumberOfNonLiveVariables, 1740 ConjunctsInSsa, 59 ConjunctsInUnsatCore, 24 InterpolantComputations, 4 PerfectInterpolantSequences, 1852/3594 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 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-09-16 11:58:15,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...