/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/parallel-min-max-1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-53ca081-m [2022-09-16 11:49:26,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-16 11:49:26,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-16 11:49:26,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-16 11:49:26,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-16 11:49:26,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-16 11:49:26,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-16 11:49:26,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-16 11:49:26,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-16 11:49:26,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-16 11:49:26,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-16 11:49:26,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-16 11:49:26,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-16 11:49:26,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-16 11:49:26,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-16 11:49:26,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-16 11:49:26,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-16 11:49:26,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-16 11:49:26,293 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-16 11:49:26,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-16 11:49:26,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-16 11:49:26,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-16 11:49:26,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-16 11:49:26,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-16 11:49:26,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-16 11:49:26,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-16 11:49:26,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-16 11:49:26,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-16 11:49:26,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-16 11:49:26,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-16 11:49:26,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-16 11:49:26,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-16 11:49:26,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-16 11:49:26,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-16 11:49:26,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-16 11:49:26,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-16 11:49:26,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-16 11:49:26,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-16 11:49:26,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-16 11:49:26,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-16 11:49:26,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-16 11:49:26,308 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 11:49:26,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-16 11:49:26,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-16 11:49:26,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-16 11:49:26,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-16 11:49:26,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-16 11:49:26,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-16 11:49:26,326 INFO L138 SettingsManager]: * Use SBE=true [2022-09-16 11:49:26,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-16 11:49:26,326 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-16 11:49:26,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-16 11:49:26,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-16 11:49:26,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-16 11:49:26,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-16 11:49:26,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-16 11:49:26,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-16 11:49:26,334 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-16 11:49:26,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-16 11:49:26,334 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-16 11:49:26,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-16 11:49:26,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-16 11:49:26,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-16 11:49:26,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-16 11:49:26,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-16 11:49:26,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 11:49:26,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-16 11:49:26,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-16 11:49:26,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-16 11:49:26,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-16 11:49:26,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-16 11:49:26,336 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-16 11:49:26,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-16 11:49:26,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of error function in SV-COMP mode -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2022-09-16 11:49:26,536 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-16 11:49:26,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-16 11:49:26,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-16 11:49:26,554 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-16 11:49:26,556 INFO L275 PluginConnector]: CDTParser initialized [2022-09-16 11:49:26,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2022-09-16 11:49:26,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705bedf82/dd36fb9412c942cc892b5d310681967d/FLAG307959b59 [2022-09-16 11:49:26,987 INFO L306 CDTParser]: Found 1 translation units. [2022-09-16 11:49:26,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-min-max-1.wvr.c [2022-09-16 11:49:26,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705bedf82/dd36fb9412c942cc892b5d310681967d/FLAG307959b59 [2022-09-16 11:49:27,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/705bedf82/dd36fb9412c942cc892b5d310681967d [2022-09-16 11:49:27,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-16 11:49:27,004 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-16 11:49:27,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-16 11:49:27,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-16 11:49:27,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-16 11:49:27,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,008 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7adb7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27, skipping insertion in model container [2022-09-16 11:49:27,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-16 11:49:27,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-16 11:49:27,238 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/parallel-min-max-1.wvr.c[3057,3070] [2022-09-16 11:49:27,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 11:49:27,258 INFO L203 MainTranslator]: Completed pre-run [2022-09-16 11:49:27,295 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/parallel-min-max-1.wvr.c[3057,3070] [2022-09-16 11:49:27,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-16 11:49:27,309 INFO L208 MainTranslator]: Completed translation [2022-09-16 11:49:27,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27 WrapperNode [2022-09-16 11:49:27,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-16 11:49:27,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-16 11:49:27,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-16 11:49:27,312 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-16 11:49:27,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,352 INFO L138 Inliner]: procedures = 25, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 124 [2022-09-16 11:49:27,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-16 11:49:27,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-16 11:49:27,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-16 11:49:27,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-16 11:49:27,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-16 11:49:27,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-16 11:49:27,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-16 11:49:27,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-16 11:49:27,373 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (1/1) ... [2022-09-16 11:49:27,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-16 11:49:27,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:27,401 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 11:49:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-16 11:49:27,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-16 11:49:27,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-09-16 11:49:27,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-09-16 11:49:27,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-09-16 11:49:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-16 11:49:27,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-16 11:49:27,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-16 11:49:27,428 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 11:49:27,423 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 11:49:27,511 INFO L234 CfgBuilder]: Building ICFG [2022-09-16 11:49:27,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-16 11:49:27,771 INFO L275 CfgBuilder]: Performing block encoding [2022-09-16 11:49:27,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-16 11:49:27,816 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-09-16 11:49:27,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 11:49:27 BoogieIcfgContainer [2022-09-16 11:49:27,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-16 11:49:27,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-16 11:49:27,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-16 11:49:27,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-16 11:49:27,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 11:49:27" (1/3) ... [2022-09-16 11:49:27,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a609aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 11:49:27, skipping insertion in model container [2022-09-16 11:49:27,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 11:49:27" (2/3) ... [2022-09-16 11:49:27,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23a609aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 11:49:27, skipping insertion in model container [2022-09-16 11:49:27,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 11:49:27" (3/3) ... [2022-09-16 11:49:27,829 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2022-09-16 11:49:27,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-16 11:49:27,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-09-16 11:49:27,841 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-16 11:49:27,905 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-09-16 11:49:27,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 187 transitions, 398 flow [2022-09-16 11:49:27,995 INFO L130 PetriNetUnfolder]: 12/184 cut-off events. [2022-09-16 11:49:27,995 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-09-16 11:49:28,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 184 events. 12/184 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 146 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 154. Up to 2 conditions per place. [2022-09-16 11:49:28,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 187 transitions, 398 flow [2022-09-16 11:49:28,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 160 transitions, 332 flow [2022-09-16 11:49:28,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-16 11:49:28,026 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;@31b3b075, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-16 11:49:28,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-09-16 11:49:28,039 INFO L130 PetriNetUnfolder]: 4/82 cut-off events. [2022-09-16 11:49:28,040 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-16 11:49:28,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:28,040 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] [2022-09-16 11:49:28,043 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:28,047 INFO L85 PathProgramCache]: Analyzing trace with hash 392499776, now seen corresponding path program 1 times [2022-09-16 11:49:28,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:28,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328208482] [2022-09-16 11:49:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:28,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:28,287 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 11:49:28,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:28,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328208482] [2022-09-16 11:49:28,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328208482] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:28,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:49:28,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:49:28,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028250925] [2022-09-16 11:49:28,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:28,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:49:28,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:28,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:49:28,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:49:28,343 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 187 [2022-09-16 11:49:28,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 160 transitions, 332 flow. Second operand has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 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 11:49:28,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:28,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 187 [2022-09-16 11:49:28,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:28,582 INFO L130 PetriNetUnfolder]: 63/517 cut-off events. [2022-09-16 11:49:28,582 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2022-09-16 11:49:28,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 688 conditions, 517 events. 63/517 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2462 event pairs, 40 based on Foata normal form. 29/458 useless extension candidates. Maximal degree in co-relation 391. Up to 57 conditions per place. [2022-09-16 11:49:28,591 INFO L137 encePairwiseOnDemand]: 174/187 looper letters, 32 selfloop transitions, 4 changer transitions 4/169 dead transitions. [2022-09-16 11:49:28,591 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 169 transitions, 434 flow [2022-09-16 11:49:28,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:49:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:49:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 829 transitions. [2022-09-16 11:49:28,610 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8866310160427807 [2022-09-16 11:49:28,611 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 829 transitions. [2022-09-16 11:49:28,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 829 transitions. [2022-09-16 11:49:28,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:28,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 829 transitions. [2022-09-16 11:49:28,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.8) internal successors, (829), 5 states have internal predecessors, (829), 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 11:49:28,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 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 11:49:28,628 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 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 11:49:28,629 INFO L175 Difference]: Start difference. First operand has 159 places, 160 transitions, 332 flow. Second operand 5 states and 829 transitions. [2022-09-16 11:49:28,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 169 transitions, 434 flow [2022-09-16 11:49:28,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 169 transitions, 422 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-16 11:49:28,636 INFO L231 Difference]: Finished difference. Result has 162 places, 152 transitions, 334 flow [2022-09-16 11:49:28,638 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=162, PETRI_TRANSITIONS=152} [2022-09-16 11:49:28,641 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 3 predicate places. [2022-09-16 11:49:28,641 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 152 transitions, 334 flow [2022-09-16 11:49:28,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.5) internal successors, (630), 4 states have internal predecessors, (630), 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 11:49:28,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:28,642 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, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:49:28,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-16 11:49:28,643 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1027812931, now seen corresponding path program 1 times [2022-09-16 11:49:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:28,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442443954] [2022-09-16 11:49:28,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:28,754 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 11:49:28,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:28,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442443954] [2022-09-16 11:49:28,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442443954] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:28,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624983316] [2022-09-16 11:49:28,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:28,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:28,758 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 11:49:28,759 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 11:49:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:28,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:49:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:28,933 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 11:49:28,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:49:28,993 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 11:49:28,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624983316] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:49:28,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:49:28,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-09-16 11:49:29,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187956822] [2022-09-16 11:49:29,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:49:29,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-09-16 11:49:29,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:29,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-09-16 11:49:29,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-09-16 11:49:29,006 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 187 [2022-09-16 11:49:29,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 152 transitions, 334 flow. Second operand has 12 states, 12 states have (on average 158.66666666666666) internal successors, (1904), 12 states have internal predecessors, (1904), 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 11:49:29,008 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:29,008 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 187 [2022-09-16 11:49:29,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:29,310 INFO L130 PetriNetUnfolder]: 156/1183 cut-off events. [2022-09-16 11:49:29,311 INFO L131 PetriNetUnfolder]: For 26/26 co-relation queries the response was YES. [2022-09-16 11:49:29,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1603 conditions, 1183 events. 156/1183 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 7482 event pairs, 100 based on Foata normal form. 3/985 useless extension candidates. Maximal degree in co-relation 1224. Up to 70 conditions per place. [2022-09-16 11:49:29,319 INFO L137 encePairwiseOnDemand]: 180/187 looper letters, 68 selfloop transitions, 18 changer transitions 0/215 dead transitions. [2022-09-16 11:49:29,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 215 transitions, 678 flow [2022-09-16 11:49:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-09-16 11:49:29,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-09-16 11:49:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2897 transitions. [2022-09-16 11:49:29,323 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8606654783125371 [2022-09-16 11:49:29,323 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2897 transitions. [2022-09-16 11:49:29,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2897 transitions. [2022-09-16 11:49:29,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:29,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2897 transitions. [2022-09-16 11:49:29,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 160.94444444444446) internal successors, (2897), 18 states have internal predecessors, (2897), 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 11:49:29,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 187.0) internal successors, (3553), 19 states have internal predecessors, (3553), 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 11:49:29,335 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 187.0) internal successors, (3553), 19 states have internal predecessors, (3553), 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 11:49:29,335 INFO L175 Difference]: Start difference. First operand has 162 places, 152 transitions, 334 flow. Second operand 18 states and 2897 transitions. [2022-09-16 11:49:29,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 215 transitions, 678 flow [2022-09-16 11:49:29,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 215 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 11:49:29,339 INFO L231 Difference]: Finished difference. Result has 178 places, 164 transitions, 438 flow [2022-09-16 11:49:29,339 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=438, PETRI_PLACES=178, PETRI_TRANSITIONS=164} [2022-09-16 11:49:29,340 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 19 predicate places. [2022-09-16 11:49:29,340 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 164 transitions, 438 flow [2022-09-16 11:49:29,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 158.66666666666666) internal successors, (1904), 12 states have internal predecessors, (1904), 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 11:49:29,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:29,341 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, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:49:29,371 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 11:49:29,559 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 11:49:29,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1797429457, now seen corresponding path program 1 times [2022-09-16 11:49:29,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:29,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134298291] [2022-09-16 11:49:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:29,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:29,626 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 11:49:29,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:29,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134298291] [2022-09-16 11:49:29,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134298291] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:29,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971839271] [2022-09-16 11:49:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:29,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:29,628 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 11:49:29,629 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 11:49:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:29,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:49:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:29,776 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 11:49:29,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:49:29,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971839271] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:29,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:49:29,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 11:49:29,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495997424] [2022-09-16 11:49:29,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:29,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 11:49:29,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 11:49:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 11:49:29,781 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 187 [2022-09-16 11:49:29,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 164 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 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 11:49:29,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:29,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 187 [2022-09-16 11:49:29,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:29,947 INFO L130 PetriNetUnfolder]: 156/1179 cut-off events. [2022-09-16 11:49:29,947 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2022-09-16 11:49:29,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 1179 events. 156/1179 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 7490 event pairs, 100 based on Foata normal form. 4/982 useless extension candidates. Maximal degree in co-relation 1284. Up to 192 conditions per place. [2022-09-16 11:49:29,955 INFO L137 encePairwiseOnDemand]: 182/187 looper letters, 33 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2022-09-16 11:49:29,956 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 173 transitions, 533 flow [2022-09-16 11:49:29,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 11:49:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 11:49:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1128 transitions. [2022-09-16 11:49:29,958 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8617265087853323 [2022-09-16 11:49:29,958 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1128 transitions. [2022-09-16 11:49:29,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1128 transitions. [2022-09-16 11:49:29,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:29,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1128 transitions. [2022-09-16 11:49:29,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 161.14285714285714) internal successors, (1128), 7 states have internal predecessors, (1128), 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 11:49:29,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 187.0) internal successors, (1496), 8 states have internal predecessors, (1496), 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 11:49:29,962 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 187.0) internal successors, (1496), 8 states have internal predecessors, (1496), 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 11:49:29,962 INFO L175 Difference]: Start difference. First operand has 178 places, 164 transitions, 438 flow. Second operand 7 states and 1128 transitions. [2022-09-16 11:49:29,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 173 transitions, 533 flow [2022-09-16 11:49:29,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 173 transitions, 501 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-09-16 11:49:29,968 INFO L231 Difference]: Finished difference. Result has 174 places, 160 transitions, 401 flow [2022-09-16 11:49:29,968 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=401, PETRI_PLACES=174, PETRI_TRANSITIONS=160} [2022-09-16 11:49:29,970 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 15 predicate places. [2022-09-16 11:49:29,970 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 160 transitions, 401 flow [2022-09-16 11:49:29,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.33333333333334) internal successors, (950), 6 states have internal predecessors, (950), 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 11:49:29,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:29,971 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] [2022-09-16 11:49:29,990 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 11:49:30,183 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 11:49:30,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:30,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1925412711, now seen corresponding path program 1 times [2022-09-16 11:49:30,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:30,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449814856] [2022-09-16 11:49:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:30,254 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 11:49:30,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:30,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449814856] [2022-09-16 11:49:30,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449814856] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:30,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:49:30,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:49:30,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959001495] [2022-09-16 11:49:30,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:30,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:49:30,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:49:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:49:30,259 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 187 [2022-09-16 11:49:30,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 160 transitions, 401 flow. Second operand has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 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 11:49:30,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:30,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 187 [2022-09-16 11:49:30,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:30,580 INFO L130 PetriNetUnfolder]: 901/3304 cut-off events. [2022-09-16 11:49:30,580 INFO L131 PetriNetUnfolder]: For 52/87 co-relation queries the response was YES. [2022-09-16 11:49:30,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5713 conditions, 3304 events. 901/3304 cut-off events. For 52/87 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 28414 event pairs, 525 based on Foata normal form. 5/2819 useless extension candidates. Maximal degree in co-relation 4564. Up to 931 conditions per place. [2022-09-16 11:49:30,602 INFO L137 encePairwiseOnDemand]: 181/187 looper letters, 35 selfloop transitions, 4 changer transitions 0/181 dead transitions. [2022-09-16 11:49:30,602 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 181 transitions, 534 flow [2022-09-16 11:49:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:49:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:49:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 831 transitions. [2022-09-16 11:49:30,604 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8887700534759359 [2022-09-16 11:49:30,604 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 831 transitions. [2022-09-16 11:49:30,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 831 transitions. [2022-09-16 11:49:30,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:30,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 831 transitions. [2022-09-16 11:49:30,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.2) internal successors, (831), 5 states have internal predecessors, (831), 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 11:49:30,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 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 11:49:30,607 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 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 11:49:30,607 INFO L175 Difference]: Start difference. First operand has 174 places, 160 transitions, 401 flow. Second operand 5 states and 831 transitions. [2022-09-16 11:49:30,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 181 transitions, 534 flow [2022-09-16 11:49:30,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 181 transitions, 520 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-09-16 11:49:30,612 INFO L231 Difference]: Finished difference. Result has 176 places, 163 transitions, 417 flow [2022-09-16 11:49:30,612 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=417, PETRI_PLACES=176, PETRI_TRANSITIONS=163} [2022-09-16 11:49:30,613 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 17 predicate places. [2022-09-16 11:49:30,613 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 163 transitions, 417 flow [2022-09-16 11:49:30,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.75) internal successors, (639), 4 states have internal predecessors, (639), 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 11:49:30,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:30,614 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] [2022-09-16 11:49:30,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-09-16 11:49:30,614 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:30,614 INFO L85 PathProgramCache]: Analyzing trace with hash 884461943, now seen corresponding path program 1 times [2022-09-16 11:49:30,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:30,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720027496] [2022-09-16 11:49:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:30,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:30,682 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 11:49:30,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:30,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720027496] [2022-09-16 11:49:30,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720027496] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:30,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-16 11:49:30,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-16 11:49:30,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182183492] [2022-09-16 11:49:30,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:30,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-09-16 11:49:30,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-09-16 11:49:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-09-16 11:49:30,684 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 187 [2022-09-16 11:49:30,684 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 163 transitions, 417 flow. Second operand has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 11:49:30,684 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:30,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 187 [2022-09-16 11:49:30,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:31,111 INFO L130 PetriNetUnfolder]: 1241/3519 cut-off events. [2022-09-16 11:49:31,111 INFO L131 PetriNetUnfolder]: For 262/262 co-relation queries the response was YES. [2022-09-16 11:49:31,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6829 conditions, 3519 events. 1241/3519 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 30707 event pairs, 570 based on Foata normal form. 0/3154 useless extension candidates. Maximal degree in co-relation 5455. Up to 1361 conditions per place. [2022-09-16 11:49:31,135 INFO L137 encePairwiseOnDemand]: 181/187 looper letters, 34 selfloop transitions, 4 changer transitions 0/183 dead transitions. [2022-09-16 11:49:31,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 183 transitions, 542 flow [2022-09-16 11:49:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-09-16 11:49:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-09-16 11:49:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 830 transitions. [2022-09-16 11:49:31,138 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8877005347593583 [2022-09-16 11:49:31,138 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 830 transitions. [2022-09-16 11:49:31,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 830 transitions. [2022-09-16 11:49:31,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:31,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 830 transitions. [2022-09-16 11:49:31,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.0) internal successors, (830), 5 states have internal predecessors, (830), 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 11:49:31,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 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 11:49:31,141 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 187.0) internal successors, (1122), 6 states have internal predecessors, (1122), 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 11:49:31,141 INFO L175 Difference]: Start difference. First operand has 176 places, 163 transitions, 417 flow. Second operand 5 states and 830 transitions. [2022-09-16 11:49:31,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 183 transitions, 542 flow [2022-09-16 11:49:31,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 183 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 11:49:31,146 INFO L231 Difference]: Finished difference. Result has 182 places, 166 transitions, 445 flow [2022-09-16 11:49:31,146 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=445, PETRI_PLACES=182, PETRI_TRANSITIONS=166} [2022-09-16 11:49:31,148 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 23 predicate places. [2022-09-16 11:49:31,148 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 166 transitions, 445 flow [2022-09-16 11:49:31,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 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 11:49:31,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:31,148 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-09-16 11:49:31,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-09-16 11:49:31,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1930627857, now seen corresponding path program 1 times [2022-09-16 11:49:31,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:31,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522165512] [2022-09-16 11:49:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:31,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:31,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:31,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522165512] [2022-09-16 11:49:31,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522165512] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:31,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385820659] [2022-09-16 11:49:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:31,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:31,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:31,212 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 11:49:31,231 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 11:49:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-16 11:49:31,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-09-16 11:49:31,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:49:31,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385820659] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:31,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:49:31,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-09-16 11:49:31,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145000249] [2022-09-16 11:49:31,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:31,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 11:49:31,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 11:49:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-09-16 11:49:31,413 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 187 [2022-09-16 11:49:31,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 166 transitions, 445 flow. Second operand has 7 states, 7 states have (on average 148.71428571428572) internal successors, (1041), 7 states have internal predecessors, (1041), 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 11:49:31,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:31,414 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 187 [2022-09-16 11:49:31,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:32,028 INFO L130 PetriNetUnfolder]: 1501/5011 cut-off events. [2022-09-16 11:49:32,028 INFO L131 PetriNetUnfolder]: For 1001/1001 co-relation queries the response was YES. [2022-09-16 11:49:32,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10423 conditions, 5011 events. 1501/5011 cut-off events. For 1001/1001 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 46159 event pairs, 1218 based on Foata normal form. 0/4441 useless extension candidates. Maximal degree in co-relation 9692. Up to 2273 conditions per place. [2022-09-16 11:49:32,062 INFO L137 encePairwiseOnDemand]: 178/187 looper letters, 50 selfloop transitions, 8 changer transitions 2/186 dead transitions. [2022-09-16 11:49:32,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 186 transitions, 617 flow [2022-09-16 11:49:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-16 11:49:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-16 11:49:32,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1221 transitions. [2022-09-16 11:49:32,065 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8161764705882353 [2022-09-16 11:49:32,065 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1221 transitions. [2022-09-16 11:49:32,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1221 transitions. [2022-09-16 11:49:32,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:32,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1221 transitions. [2022-09-16 11:49:32,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 152.625) internal successors, (1221), 8 states have internal predecessors, (1221), 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 11:49:32,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 187.0) internal successors, (1683), 9 states have internal predecessors, (1683), 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 11:49:32,070 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 187.0) internal successors, (1683), 9 states have internal predecessors, (1683), 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 11:49:32,070 INFO L175 Difference]: Start difference. First operand has 182 places, 166 transitions, 445 flow. Second operand 8 states and 1221 transitions. [2022-09-16 11:49:32,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 186 transitions, 617 flow [2022-09-16 11:49:32,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 186 transitions, 615 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-16 11:49:32,086 INFO L231 Difference]: Finished difference. Result has 191 places, 168 transitions, 477 flow [2022-09-16 11:49:32,086 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=191, PETRI_TRANSITIONS=168} [2022-09-16 11:49:32,089 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 32 predicate places. [2022-09-16 11:49:32,089 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 168 transitions, 477 flow [2022-09-16 11:49:32,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.71428571428572) internal successors, (1041), 7 states have internal predecessors, (1041), 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 11:49:32,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:32,090 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-09-16 11:49:32,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-09-16 11:49:32,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:32,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1337321091, now seen corresponding path program 1 times [2022-09-16 11:49:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:32,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622418541] [2022-09-16 11:49:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:32,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622418541] [2022-09-16 11:49:32,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622418541] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:32,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29265298] [2022-09-16 11:49:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:32,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:32,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:32,343 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 11:49:32,344 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 11:49:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 6 conjunts are in the unsatisfiable core [2022-09-16 11:49:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-09-16 11:49:32,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:49:32,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29265298] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:32,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:49:32,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-09-16 11:49:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740920110] [2022-09-16 11:49:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-09-16 11:49:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-09-16 11:49:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-09-16 11:49:32,503 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 187 [2022-09-16 11:49:32,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 168 transitions, 477 flow. Second operand has 7 states, 7 states have (on average 148.85714285714286) internal successors, (1042), 7 states have internal predecessors, (1042), 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 11:49:32,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:32,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 187 [2022-09-16 11:49:32,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:33,028 INFO L130 PetriNetUnfolder]: 1326/3761 cut-off events. [2022-09-16 11:49:33,028 INFO L131 PetriNetUnfolder]: For 858/862 co-relation queries the response was YES. [2022-09-16 11:49:33,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8194 conditions, 3761 events. 1326/3761 cut-off events. For 858/862 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 31727 event pairs, 1224 based on Foata normal form. 4/3439 useless extension candidates. Maximal degree in co-relation 7813. Up to 2201 conditions per place. [2022-09-16 11:49:33,049 INFO L137 encePairwiseOnDemand]: 178/187 looper letters, 36 selfloop transitions, 6 changer transitions 15/183 dead transitions. [2022-09-16 11:49:33,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 183 transitions, 630 flow [2022-09-16 11:49:33,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-09-16 11:49:33,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-09-16 11:49:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1217 transitions. [2022-09-16 11:49:33,052 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8135026737967914 [2022-09-16 11:49:33,052 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1217 transitions. [2022-09-16 11:49:33,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1217 transitions. [2022-09-16 11:49:33,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:33,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1217 transitions. [2022-09-16 11:49:33,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 152.125) internal successors, (1217), 8 states have internal predecessors, (1217), 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 11:49:33,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 187.0) internal successors, (1683), 9 states have internal predecessors, (1683), 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 11:49:33,057 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 187.0) internal successors, (1683), 9 states have internal predecessors, (1683), 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 11:49:33,057 INFO L175 Difference]: Start difference. First operand has 191 places, 168 transitions, 477 flow. Second operand 8 states and 1217 transitions. [2022-09-16 11:49:33,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 183 transitions, 630 flow [2022-09-16 11:49:33,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 183 transitions, 620 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-09-16 11:49:33,064 INFO L231 Difference]: Finished difference. Result has 196 places, 166 transitions, 469 flow [2022-09-16 11:49:33,065 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=469, PETRI_PLACES=196, PETRI_TRANSITIONS=166} [2022-09-16 11:49:33,065 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 37 predicate places. [2022-09-16 11:49:33,065 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 166 transitions, 469 flow [2022-09-16 11:49:33,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.85714285714286) internal successors, (1042), 7 states have internal predecessors, (1042), 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 11:49:33,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:33,066 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, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:49:33,091 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 11:49:33,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:33,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 739861376, now seen corresponding path program 2 times [2022-09-16 11:49:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:33,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081469516] [2022-09-16 11:49:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:33,342 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 11:49:33,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081469516] [2022-09-16 11:49:33,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081469516] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:33,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762296563] [2022-09-16 11:49:33,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:49:33,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:33,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:33,344 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 11:49:33,345 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 11:49:33,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:49:33,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:49:33,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-09-16 11:49:33,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:33,511 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 11:49:33,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:49:33,611 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 11:49:33,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762296563] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:49:33,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:49:33,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-09-16 11:49:33,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442336771] [2022-09-16 11:49:33,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:49:33,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-09-16 11:49:33,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-09-16 11:49:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-09-16 11:49:33,614 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 187 [2022-09-16 11:49:33,615 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 166 transitions, 469 flow. Second operand has 18 states, 18 states have (on average 144.72222222222223) internal successors, (2605), 18 states have internal predecessors, (2605), 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 11:49:33,615 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:33,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 187 [2022-09-16 11:49:33,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:34,503 INFO L130 PetriNetUnfolder]: 1225/4643 cut-off events. [2022-09-16 11:49:34,504 INFO L131 PetriNetUnfolder]: For 944/944 co-relation queries the response was YES. [2022-09-16 11:49:34,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9582 conditions, 4643 events. 1225/4643 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 42689 event pairs, 1092 based on Foata normal form. 2/4450 useless extension candidates. Maximal degree in co-relation 9458. Up to 433 conditions per place. [2022-09-16 11:49:34,587 INFO L137 encePairwiseOnDemand]: 176/187 looper letters, 109 selfloop transitions, 25 changer transitions 0/254 dead transitions. [2022-09-16 11:49:34,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 254 transitions, 987 flow [2022-09-16 11:49:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-09-16 11:49:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-09-16 11:49:34,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3520 transitions. [2022-09-16 11:49:34,609 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7843137254901961 [2022-09-16 11:49:34,609 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3520 transitions. [2022-09-16 11:49:34,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3520 transitions. [2022-09-16 11:49:34,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:34,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3520 transitions. [2022-09-16 11:49:34,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 146.66666666666666) internal successors, (3520), 24 states have internal predecessors, (3520), 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 11:49:34,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 187.0) internal successors, (4675), 25 states have internal predecessors, (4675), 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 11:49:34,625 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 187.0) internal successors, (4675), 25 states have internal predecessors, (4675), 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 11:49:34,626 INFO L175 Difference]: Start difference. First operand has 196 places, 166 transitions, 469 flow. Second operand 24 states and 3520 transitions. [2022-09-16 11:49:34,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 254 transitions, 987 flow [2022-09-16 11:49:34,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 254 transitions, 937 flow, removed 14 selfloop flow, removed 14 redundant places. [2022-09-16 11:49:34,659 INFO L231 Difference]: Finished difference. Result has 201 places, 170 transitions, 508 flow [2022-09-16 11:49:34,659 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=508, PETRI_PLACES=201, PETRI_TRANSITIONS=170} [2022-09-16 11:49:34,661 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 42 predicate places. [2022-09-16 11:49:34,661 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 170 transitions, 508 flow [2022-09-16 11:49:34,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 144.72222222222223) internal successors, (2605), 18 states have internal predecessors, (2605), 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 11:49:34,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:34,662 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-09-16 11:49:34,682 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 11:49:34,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:34,875 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:34,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 224976142, now seen corresponding path program 1 times [2022-09-16 11:49:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:34,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387302165] [2022-09-16 11:49:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 11:49:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387302165] [2022-09-16 11:49:34,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387302165] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607264901] [2022-09-16 11:49:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:34,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:34,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:34,924 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 11:49:34,925 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 11:49:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:34,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2022-09-16 11:49:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:35,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:49:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:35,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607264901] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:49:35,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:49:35,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 23 [2022-09-16 11:49:35,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885203229] [2022-09-16 11:49:35,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:49:35,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-16 11:49:35,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-16 11:49:35,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-09-16 11:49:35,348 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 187 [2022-09-16 11:49:35,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 170 transitions, 508 flow. Second operand has 23 states, 23 states have (on average 139.69565217391303) internal successors, (3213), 23 states have internal predecessors, (3213), 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 11:49:35,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:35,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 187 [2022-09-16 11:49:35,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:36,914 INFO L130 PetriNetUnfolder]: 3760/8351 cut-off events. [2022-09-16 11:49:36,914 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2022-09-16 11:49:36,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19603 conditions, 8351 events. 3760/8351 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 74165 event pairs, 1100 based on Foata normal form. 85/7337 useless extension candidates. Maximal degree in co-relation 12309. Up to 2024 conditions per place. [2022-09-16 11:49:36,956 INFO L137 encePairwiseOnDemand]: 169/187 looper letters, 146 selfloop transitions, 32 changer transitions 9/299 dead transitions. [2022-09-16 11:49:36,957 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 299 transitions, 1235 flow [2022-09-16 11:49:36,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-09-16 11:49:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-09-16 11:49:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3577 transitions. [2022-09-16 11:49:36,962 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7651336898395722 [2022-09-16 11:49:36,962 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3577 transitions. [2022-09-16 11:49:36,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3577 transitions. [2022-09-16 11:49:36,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:36,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3577 transitions. [2022-09-16 11:49:36,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 143.08) internal successors, (3577), 25 states have internal predecessors, (3577), 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 11:49:36,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 187.0) internal successors, (4862), 26 states have internal predecessors, (4862), 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 11:49:36,989 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 187.0) internal successors, (4862), 26 states have internal predecessors, (4862), 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 11:49:36,990 INFO L175 Difference]: Start difference. First operand has 201 places, 170 transitions, 508 flow. Second operand 25 states and 3577 transitions. [2022-09-16 11:49:36,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 299 transitions, 1235 flow [2022-09-16 11:49:36,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 299 transitions, 1177 flow, removed 2 selfloop flow, removed 17 redundant places. [2022-09-16 11:49:37,000 INFO L231 Difference]: Finished difference. Result has 214 places, 184 transitions, 609 flow [2022-09-16 11:49:37,001 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=609, PETRI_PLACES=214, PETRI_TRANSITIONS=184} [2022-09-16 11:49:37,001 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 55 predicate places. [2022-09-16 11:49:37,001 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 184 transitions, 609 flow [2022-09-16 11:49:37,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 139.69565217391303) internal successors, (3213), 23 states have internal predecessors, (3213), 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 11:49:37,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:37,002 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2022-09-16 11:49:37,032 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 11:49:37,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:37,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1412662976, now seen corresponding path program 1 times [2022-09-16 11:49:37,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:37,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037363004] [2022-09-16 11:49:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:37,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-09-16 11:49:37,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037363004] [2022-09-16 11:49:37,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037363004] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7751562] [2022-09-16 11:49:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:37,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:37,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:37,257 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 11:49:37,258 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 11:49:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:37,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-09-16 11:49:37,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:37,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:49:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:37,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7751562] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:49:37,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:49:37,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 23 [2022-09-16 11:49:37,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059814450] [2022-09-16 11:49:37,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:49:37,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-09-16 11:49:37,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:37,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-09-16 11:49:37,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-09-16 11:49:37,688 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 187 [2022-09-16 11:49:37,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 184 transitions, 609 flow. Second operand has 23 states, 23 states have (on average 139.7826086956522) internal successors, (3215), 23 states have internal predecessors, (3215), 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 11:49:37,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:37,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 187 [2022-09-16 11:49:37,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:39,465 INFO L130 PetriNetUnfolder]: 5215/10796 cut-off events. [2022-09-16 11:49:39,465 INFO L131 PetriNetUnfolder]: For 2978/3756 co-relation queries the response was YES. [2022-09-16 11:49:39,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28380 conditions, 10796 events. 5215/10796 cut-off events. For 2978/3756 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 98571 event pairs, 1658 based on Foata normal form. 903/11098 useless extension candidates. Maximal degree in co-relation 20387. Up to 3079 conditions per place. [2022-09-16 11:49:39,542 INFO L137 encePairwiseOnDemand]: 169/187 looper letters, 116 selfloop transitions, 26 changer transitions 72/330 dead transitions. [2022-09-16 11:49:39,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 330 transitions, 1519 flow [2022-09-16 11:49:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-09-16 11:49:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-09-16 11:49:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3574 transitions. [2022-09-16 11:49:39,546 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7644919786096257 [2022-09-16 11:49:39,546 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3574 transitions. [2022-09-16 11:49:39,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3574 transitions. [2022-09-16 11:49:39,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:39,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3574 transitions. [2022-09-16 11:49:39,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 142.96) internal successors, (3574), 25 states have internal predecessors, (3574), 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 11:49:39,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 187.0) internal successors, (4862), 26 states have internal predecessors, (4862), 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 11:49:39,556 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 187.0) internal successors, (4862), 26 states have internal predecessors, (4862), 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 11:49:39,556 INFO L175 Difference]: Start difference. First operand has 214 places, 184 transitions, 609 flow. Second operand 25 states and 3574 transitions. [2022-09-16 11:49:39,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 330 transitions, 1519 flow [2022-09-16 11:49:39,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 330 transitions, 1482 flow, removed 3 selfloop flow, removed 10 redundant places. [2022-09-16 11:49:39,575 INFO L231 Difference]: Finished difference. Result has 233 places, 183 transitions, 641 flow [2022-09-16 11:49:39,575 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=641, PETRI_PLACES=233, PETRI_TRANSITIONS=183} [2022-09-16 11:49:39,576 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 74 predicate places. [2022-09-16 11:49:39,576 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 183 transitions, 641 flow [2022-09-16 11:49:39,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 139.7826086956522) internal successors, (3215), 23 states have internal predecessors, (3215), 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 11:49:39,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:39,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:39,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-09-16 11:49:39,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:39,791 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:39,792 INFO L85 PathProgramCache]: Analyzing trace with hash -272891788, now seen corresponding path program 1 times [2022-09-16 11:49:39,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:39,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461606015] [2022-09-16 11:49:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:39,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 11:49:39,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461606015] [2022-09-16 11:49:39,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461606015] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:39,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013964611] [2022-09-16 11:49:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:39,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:39,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:39,836 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 11:49:39,837 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 11:49:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:39,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:49:39,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 11:49:39,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:49:39,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013964611] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:39,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:49:39,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 11:49:39,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089110499] [2022-09-16 11:49:39,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:39,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 11:49:39,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 11:49:39,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 11:49:39,935 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 187 [2022-09-16 11:49:39,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 183 transitions, 641 flow. Second operand has 6 states, 6 states have (on average 160.5) internal successors, (963), 6 states have internal predecessors, (963), 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 11:49:39,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:39,936 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 187 [2022-09-16 11:49:39,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:40,888 INFO L130 PetriNetUnfolder]: 2026/6664 cut-off events. [2022-09-16 11:49:40,888 INFO L131 PetriNetUnfolder]: For 2730/2760 co-relation queries the response was YES. [2022-09-16 11:49:40,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16286 conditions, 6664 events. 2026/6664 cut-off events. For 2730/2760 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 66927 event pairs, 390 based on Foata normal form. 110/6624 useless extension candidates. Maximal degree in co-relation 11978. Up to 1145 conditions per place. [2022-09-16 11:49:40,930 INFO L137 encePairwiseOnDemand]: 182/187 looper letters, 42 selfloop transitions, 8 changer transitions 0/206 dead transitions. [2022-09-16 11:49:40,931 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 206 transitions, 800 flow [2022-09-16 11:49:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 11:49:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 11:49:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1153 transitions. [2022-09-16 11:49:40,932 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8808250572956455 [2022-09-16 11:49:40,932 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1153 transitions. [2022-09-16 11:49:40,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1153 transitions. [2022-09-16 11:49:40,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:40,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1153 transitions. [2022-09-16 11:49:40,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 164.71428571428572) internal successors, (1153), 7 states have internal predecessors, (1153), 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 11:49:40,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 187.0) internal successors, (1496), 8 states have internal predecessors, (1496), 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 11:49:40,936 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 187.0) internal successors, (1496), 8 states have internal predecessors, (1496), 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 11:49:40,936 INFO L175 Difference]: Start difference. First operand has 233 places, 183 transitions, 641 flow. Second operand 7 states and 1153 transitions. [2022-09-16 11:49:40,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 206 transitions, 800 flow [2022-09-16 11:49:40,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 206 transitions, 759 flow, removed 6 selfloop flow, removed 14 redundant places. [2022-09-16 11:49:40,955 INFO L231 Difference]: Finished difference. Result has 212 places, 181 transitions, 604 flow [2022-09-16 11:49:40,956 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=212, PETRI_TRANSITIONS=181} [2022-09-16 11:49:40,957 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 53 predicate places. [2022-09-16 11:49:40,957 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 181 transitions, 604 flow [2022-09-16 11:49:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.5) internal successors, (963), 6 states have internal predecessors, (963), 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 11:49:40,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:40,957 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:40,976 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 11:49:41,163 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,SelfDestructingSolverStorable10 [2022-09-16 11:49:41,163 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1132596999, now seen corresponding path program 2 times [2022-09-16 11:49:41,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:41,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875680925] [2022-09-16 11:49:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:41,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:41,295 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:41,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:41,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875680925] [2022-09-16 11:49:41,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875680925] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:41,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165761628] [2022-09-16 11:49:41,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:49:41,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:41,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:41,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:49:41,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-09-16 11:49:41,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:49:41,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:49:41,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:49:41,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-09-16 11:49:41,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:49:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-09-16 11:49:41,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165761628] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:49:41,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:49:41,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 19 [2022-09-16 11:49:41,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336226858] [2022-09-16 11:49:41,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:49:41,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-16 11:49:41,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:41,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-16 11:49:41,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-09-16 11:49:41,584 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 187 [2022-09-16 11:49:41,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 181 transitions, 604 flow. Second operand has 19 states, 19 states have (on average 137.31578947368422) internal successors, (2609), 19 states have internal predecessors, (2609), 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 11:49:41,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:41,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 187 [2022-09-16 11:49:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:43,294 INFO L130 PetriNetUnfolder]: 4160/10448 cut-off events. [2022-09-16 11:49:43,294 INFO L131 PetriNetUnfolder]: For 4722/5479 co-relation queries the response was YES. [2022-09-16 11:49:43,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27142 conditions, 10448 events. 4160/10448 cut-off events. For 4722/5479 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 102397 event pairs, 760 based on Foata normal form. 754/10987 useless extension candidates. Maximal degree in co-relation 19149. Up to 1980 conditions per place. [2022-09-16 11:49:43,363 INFO L137 encePairwiseOnDemand]: 169/187 looper letters, 138 selfloop transitions, 38 changer transitions 50/337 dead transitions. [2022-09-16 11:49:43,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 337 transitions, 1613 flow [2022-09-16 11:49:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-09-16 11:49:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-09-16 11:49:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4168 transitions. [2022-09-16 11:49:43,367 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7429590017825312 [2022-09-16 11:49:43,367 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4168 transitions. [2022-09-16 11:49:43,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4168 transitions. [2022-09-16 11:49:43,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:43,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4168 transitions. [2022-09-16 11:49:43,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 138.93333333333334) internal successors, (4168), 30 states have internal predecessors, (4168), 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 11:49:43,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 187.0) internal successors, (5797), 31 states have internal predecessors, (5797), 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 11:49:43,377 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 187.0) internal successors, (5797), 31 states have internal predecessors, (5797), 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 11:49:43,377 INFO L175 Difference]: Start difference. First operand has 212 places, 181 transitions, 604 flow. Second operand 30 states and 4168 transitions. [2022-09-16 11:49:43,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 337 transitions, 1613 flow [2022-09-16 11:49:43,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 337 transitions, 1587 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-09-16 11:49:43,407 INFO L231 Difference]: Finished difference. Result has 237 places, 187 transitions, 728 flow [2022-09-16 11:49:43,407 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=728, PETRI_PLACES=237, PETRI_TRANSITIONS=187} [2022-09-16 11:49:43,407 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 78 predicate places. [2022-09-16 11:49:43,407 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 187 transitions, 728 flow [2022-09-16 11:49:43,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.31578947368422) internal successors, (2609), 19 states have internal predecessors, (2609), 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 11:49:43,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:43,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:43,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-09-16 11:49:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:43,623 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash -391017646, now seen corresponding path program 1 times [2022-09-16 11:49:43,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:43,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239577688] [2022-09-16 11:49:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 11:49:43,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:43,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239577688] [2022-09-16 11:49:43,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239577688] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:43,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381924320] [2022-09-16 11:49:43,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:43,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:43,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:43,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:49:43,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-09-16 11:49:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:43,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:49:43,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-09-16 11:49:43,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-09-16 11:49:43,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381924320] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-16 11:49:43,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-09-16 11:49:43,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-09-16 11:49:43,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695974820] [2022-09-16 11:49:43,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-16 11:49:43,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-09-16 11:49:43,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:43,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-09-16 11:49:43,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-09-16 11:49:43,773 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 187 [2022-09-16 11:49:43,774 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 187 transitions, 728 flow. Second operand has 6 states, 6 states have (on average 160.66666666666666) internal successors, (964), 6 states have internal predecessors, (964), 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 11:49:43,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:43,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 187 [2022-09-16 11:49:43,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:44,331 INFO L130 PetriNetUnfolder]: 1890/4227 cut-off events. [2022-09-16 11:49:44,332 INFO L131 PetriNetUnfolder]: For 1899/1899 co-relation queries the response was YES. [2022-09-16 11:49:44,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11087 conditions, 4227 events. 1890/4227 cut-off events. For 1899/1899 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 36495 event pairs, 115 based on Foata normal form. 126/4189 useless extension candidates. Maximal degree in co-relation 8646. Up to 1260 conditions per place. [2022-09-16 11:49:44,360 INFO L137 encePairwiseOnDemand]: 182/187 looper letters, 38 selfloop transitions, 8 changer transitions 0/209 dead transitions. [2022-09-16 11:49:44,360 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 209 transitions, 869 flow [2022-09-16 11:49:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-09-16 11:49:44,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-09-16 11:49:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1150 transitions. [2022-09-16 11:49:44,362 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.878533231474408 [2022-09-16 11:49:44,362 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1150 transitions. [2022-09-16 11:49:44,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1150 transitions. [2022-09-16 11:49:44,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:44,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1150 transitions. [2022-09-16 11:49:44,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 164.28571428571428) internal successors, (1150), 7 states have internal predecessors, (1150), 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 11:49:44,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 187.0) internal successors, (1496), 8 states have internal predecessors, (1496), 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 11:49:44,365 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 187.0) internal successors, (1496), 8 states have internal predecessors, (1496), 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 11:49:44,365 INFO L175 Difference]: Start difference. First operand has 237 places, 187 transitions, 728 flow. Second operand 7 states and 1150 transitions. [2022-09-16 11:49:44,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 209 transitions, 869 flow [2022-09-16 11:49:44,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 209 transitions, 819 flow, removed 3 selfloop flow, removed 14 redundant places. [2022-09-16 11:49:44,377 INFO L231 Difference]: Finished difference. Result has 222 places, 185 transitions, 680 flow [2022-09-16 11:49:44,377 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=680, PETRI_PLACES=222, PETRI_TRANSITIONS=185} [2022-09-16 11:49:44,378 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 63 predicate places. [2022-09-16 11:49:44,378 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 185 transitions, 680 flow [2022-09-16 11:49:44,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 160.66666666666666) internal successors, (964), 6 states have internal predecessors, (964), 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 11:49:44,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-16 11:49:44,378 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:49:44,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-09-16 11:49:44,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-09-16 11:49:44,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2022-09-16 11:49:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-16 11:49:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2122194089, now seen corresponding path program 2 times [2022-09-16 11:49:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-16 11:49:44,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538448533] [2022-09-16 11:49:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-16 11:49:44,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-16 11:49:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-16 11:49:44,722 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-16 11:49:44,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-16 11:49:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538448533] [2022-09-16 11:49:44,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538448533] provided 0 perfect and 1 imperfect interpolant sequences [2022-09-16 11:49:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580686786] [2022-09-16 11:49:44,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-09-16 11:49:44,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-09-16 11:49:44,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-16 11:49:44,724 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-09-16 11:49:44,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-09-16 11:49:44,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-09-16 11:49:44,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-09-16 11:49:44,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2022-09-16 11:49:44,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-09-16 11:49:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-09-16 11:49:44,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-09-16 11:49:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-09-16 11:49:45,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580686786] provided 0 perfect and 2 imperfect interpolant sequences [2022-09-16 11:49:45,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-09-16 11:49:45,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 5, 5] total 19 [2022-09-16 11:49:45,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344352957] [2022-09-16 11:49:45,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-09-16 11:49:45,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-09-16 11:49:45,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-16 11:49:45,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-09-16 11:49:45,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-09-16 11:49:45,044 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 187 [2022-09-16 11:49:45,046 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 185 transitions, 680 flow. Second operand has 19 states, 19 states have (on average 137.42105263157896) internal successors, (2611), 19 states have internal predecessors, (2611), 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 11:49:45,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-16 11:49:45,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 187 [2022-09-16 11:49:45,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-16 11:49:46,589 INFO L130 PetriNetUnfolder]: 3654/7952 cut-off events. [2022-09-16 11:49:46,589 INFO L131 PetriNetUnfolder]: For 7480/8892 co-relation queries the response was YES. [2022-09-16 11:49:46,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23835 conditions, 7952 events. 3654/7952 cut-off events. For 7480/8892 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 70397 event pairs, 720 based on Foata normal form. 1533/9306 useless extension candidates. Maximal degree in co-relation 17141. Up to 2124 conditions per place. [2022-09-16 11:49:46,644 INFO L137 encePairwiseOnDemand]: 170/187 looper letters, 0 selfloop transitions, 0 changer transitions 302/302 dead transitions. [2022-09-16 11:49:46,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 302 transitions, 1572 flow [2022-09-16 11:49:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-09-16 11:49:46,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-09-16 11:49:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3604 transitions. [2022-09-16 11:49:46,648 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7412587412587412 [2022-09-16 11:49:46,648 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3604 transitions. [2022-09-16 11:49:46,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3604 transitions. [2022-09-16 11:49:46,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-16 11:49:46,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3604 transitions. [2022-09-16 11:49:46,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 138.6153846153846) internal successors, (3604), 26 states have internal predecessors, (3604), 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 11:49:46,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 187.0) internal successors, (5049), 27 states have internal predecessors, (5049), 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 11:49:46,657 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 187.0) internal successors, (5049), 27 states have internal predecessors, (5049), 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 11:49:46,658 INFO L175 Difference]: Start difference. First operand has 222 places, 185 transitions, 680 flow. Second operand 26 states and 3604 transitions. [2022-09-16 11:49:46,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 302 transitions, 1572 flow [2022-09-16 11:49:46,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 302 transitions, 1546 flow, removed 2 selfloop flow, removed 6 redundant places. [2022-09-16 11:49:46,695 INFO L231 Difference]: Finished difference. Result has 240 places, 0 transitions, 0 flow [2022-09-16 11:49:46,696 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=187, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=0, PETRI_PLACES=240, PETRI_TRANSITIONS=0} [2022-09-16 11:49:46,696 INFO L287 CegarLoopForPetriNet]: 159 programPoint places, 81 predicate places. [2022-09-16 11:49:46,696 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 0 transitions, 0 flow [2022-09-16 11:49:46,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.42105263157896) internal successors, (2611), 19 states have internal predecessors, (2611), 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 11:49:46,699 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 13 remaining) [2022-09-16 11:49:46,699 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 13 remaining) [2022-09-16 11:49:46,699 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 13 remaining) [2022-09-16 11:49:46,700 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 13 remaining) [2022-09-16 11:49:46,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-09-16 11:49:46,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-09-16 11:49:46,906 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-09-16 11:49:46,910 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-16 11:49:46,910 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-16 11:49:46,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 11:49:46 BasicIcfg [2022-09-16 11:49:46,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-16 11:49:46,914 INFO L158 Benchmark]: Toolchain (without parser) took 19910.12ms. Allocated memory was 200.3MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 143.8MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-09-16 11:49:46,914 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 200.3MB. Free memory was 160.4MB in the beginning and 160.3MB in the end (delta: 150.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-16 11:49:46,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.77ms. Allocated memory is still 200.3MB. Free memory was 143.6MB in the beginning and 174.8MB in the end (delta: -31.1MB). Peak memory consumption was 15.0MB. Max. memory is 8.0GB. [2022-09-16 11:49:46,914 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.51ms. Allocated memory is still 200.3MB. Free memory was 174.8MB in the beginning and 173.1MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-16 11:49:46,914 INFO L158 Benchmark]: Boogie Preprocessor took 18.58ms. Allocated memory is still 200.3MB. Free memory was 173.1MB in the beginning and 171.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-16 11:49:46,914 INFO L158 Benchmark]: RCFGBuilder took 445.47ms. Allocated memory is still 200.3MB. Free memory was 171.2MB in the beginning and 150.7MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2022-09-16 11:49:46,915 INFO L158 Benchmark]: TraceAbstraction took 19094.44ms. Allocated memory was 200.3MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 150.0MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-09-16 11:49:46,916 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 200.3MB. Free memory was 160.4MB in the beginning and 160.3MB in the end (delta: 150.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 306.77ms. Allocated memory is still 200.3MB. Free memory was 143.6MB in the beginning and 174.8MB in the end (delta: -31.1MB). Peak memory consumption was 15.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.51ms. Allocated memory is still 200.3MB. Free memory was 174.8MB in the beginning and 173.1MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.58ms. Allocated memory is still 200.3MB. Free memory was 173.1MB in the beginning and 171.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 445.47ms. Allocated memory is still 200.3MB. Free memory was 171.2MB in the beginning and 150.7MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 19094.44ms. Allocated memory was 200.3MB in the beginning and 2.8GB in the end (delta: 2.6GB). Free memory was 150.0MB in the beginning and 1.5GB in the end (delta: -1.4GB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 56]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 56]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 74]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 74]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 125]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 125]: 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 7 procedures, 213 locations, 13 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: 19.0s, OverallIterations: 14, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 12.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2833 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2833 mSDsluCounter, 478 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1706 mSDsCounter, 212 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3853 IncrementalHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 212 mSolverCounterUnsat, 94 mSDtfsCounter, 3853 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2055 GetRequests, 1757 SyntacticMatches, 13 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=728occurred in iteration=12, InterpolantAutomatonStates: 200, 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, 2.6s InterpolantComputationTime, 2616 NumberOfCodeBlocks, 2516 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 3242 ConstructedInterpolants, 0 QuantifiedInterpolants, 6448 SizeOfPredicates, 54 NumberOfNonLiveVariables, 2346 ConjunctsInSsa, 69 ConjunctsInUnsatCore, 31 InterpolantComputations, 8 PerfectInterpolantSequences, 299/532 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 6 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-09-16 11:49:46,944 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...