./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 16:47:10,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:47:10,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:47:10,326 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:47:10,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:47:10,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:47:10,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:47:10,332 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:47:10,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:47:10,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:47:10,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:47:10,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:47:10,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:47:10,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:47:10,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:47:10,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:47:10,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:47:10,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:47:10,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:47:10,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:47:10,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:47:10,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:47:10,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:47:10,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:47:10,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:47:10,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:47:10,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:47:10,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:47:10,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:47:10,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:47:10,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:47:10,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:47:10,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:47:10,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:47:10,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:47:10,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:47:10,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:47:10,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:47:10,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:47:10,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:47:10,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:47:10,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 16:47:10,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:47:10,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:47:10,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:47:10,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:47:10,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:47:10,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:47:10,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:47:10,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:47:10,405 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:47:10,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:47:10,406 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:47:10,406 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:47:10,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:47:10,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:47:10,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:47:10,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 16:47:10,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:47:10,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 16:47:10,408 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 16:47:10,409 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:47:10,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 16:47:10,409 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:47:10,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 16:47:10,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:47:10,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:47:10,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:47:10,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:47:10,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:47:10,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:47:10,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 16:47:10,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:47:10,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:47:10,414 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 16:47:10,414 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 16:47:10,414 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 16:47:10,415 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00b544e07f34285bd260f481b4b1205a15ed1c83d300c57496244de51f7f3936 [2022-11-21 16:47:10,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:47:10,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:47:10,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:47:10,753 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:47:10,754 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:47:10,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-21 16:47:13,984 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:47:14,325 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:47:14,326 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2022-11-21 16:47:14,334 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/data/c0073f660/d342a575ffd244478b2a3cc9932d7c49/FLAG49b159deb [2022-11-21 16:47:14,353 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/data/c0073f660/d342a575ffd244478b2a3cc9932d7c49 [2022-11-21 16:47:14,356 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:47:14,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:47:14,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:47:14,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:47:14,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:47:14,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168dbe18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14, skipping insertion in model container [2022-11-21 16:47:14,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:47:14,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:47:14,659 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-21 16:47:14,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:47:14,677 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:47:14,704 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c[2681,2694] [2022-11-21 16:47:14,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:47:14,724 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:47:14,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14 WrapperNode [2022-11-21 16:47:14,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:47:14,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:47:14,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:47:14,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:47:14,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,746 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,777 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 201 [2022-11-21 16:47:14,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:47:14,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:47:14,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:47:14,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:47:14,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,804 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,812 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:47:14,818 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:47:14,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:47:14,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:47:14,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (1/1) ... [2022-11-21 16:47:14,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:47:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:14,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:47:14,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:47:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:47:14,915 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-21 16:47:14,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-21 16:47:14,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-21 16:47:14,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-21 16:47:14,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:47:14,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:47:14,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:47:14,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-21 16:47:14,920 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-21 16:47:14,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-21 16:47:14,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:47:14,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:47:14,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:47:14,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:47:14,923 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:47:15,044 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:47:15,047 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:47:15,559 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:47:15,756 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:47:15,757 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-21 16:47:15,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:47:15 BoogieIcfgContainer [2022-11-21 16:47:15,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:47:15,763 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:47:15,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:47:15,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:47:15,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:47:14" (1/3) ... [2022-11-21 16:47:15,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f61ffef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:47:15, skipping insertion in model container [2022-11-21 16:47:15,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:47:14" (2/3) ... [2022-11-21 16:47:15,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f61ffef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:47:15, skipping insertion in model container [2022-11-21 16:47:15,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:47:15" (3/3) ... [2022-11-21 16:47:15,771 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2022-11-21 16:47:15,782 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 16:47:15,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:47:15,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-21 16:47:15,796 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:47:15,874 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:47:15,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 180 transitions, 376 flow [2022-11-21 16:47:16,006 INFO L130 PetriNetUnfolder]: 13/178 cut-off events. [2022-11-21 16:47:16,007 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 16:47:16,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 178 events. 13/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 120 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 140. Up to 2 conditions per place. [2022-11-21 16:47:16,013 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 180 transitions, 376 flow [2022-11-21 16:47:16,019 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 159 transitions, 327 flow [2022-11-21 16:47:16,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:47:16,040 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@350f5cb0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:47:16,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-21 16:47:16,061 INFO L130 PetriNetUnfolder]: 3/66 cut-off events. [2022-11-21 16:47:16,062 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 16:47:16,062 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:16,063 INFO L209 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] [2022-11-21 16:47:16,064 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:16,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash 822045203, now seen corresponding path program 1 times [2022-11-21 16:47:16,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:16,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498153594] [2022-11-21 16:47:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:16,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:16,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:16,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498153594] [2022-11-21 16:47:16,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498153594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:16,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:47:16,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:47:16,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888814889] [2022-11-21 16:47:16,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:16,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:47:16,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:16,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:47:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:47:16,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-21 16:47:16,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 159 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 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) [2022-11-21 16:47:16,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:16,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-21 16:47:16,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:16,991 INFO L130 PetriNetUnfolder]: 23/315 cut-off events. [2022-11-21 16:47:16,991 INFO L131 PetriNetUnfolder]: For 30/32 co-relation queries the response was YES. [2022-11-21 16:47:16,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 315 events. 23/315 cut-off events. For 30/32 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 853 event pairs, 6 based on Foata normal form. 22/291 useless extension candidates. Maximal degree in co-relation 236. Up to 42 conditions per place. [2022-11-21 16:47:16,996 INFO L137 encePairwiseOnDemand]: 159/180 looper letters, 42 selfloop transitions, 9 changer transitions 4/173 dead transitions. [2022-11-21 16:47:16,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 173 transitions, 466 flow [2022-11-21 16:47:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:47:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:47:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 767 transitions. [2022-11-21 16:47:17,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8522222222222222 [2022-11-21 16:47:17,017 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 767 transitions. [2022-11-21 16:47:17,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 767 transitions. [2022-11-21 16:47:17,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:17,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 767 transitions. [2022-11-21 16:47:17,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 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) [2022-11-21 16:47:17,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 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) [2022-11-21 16:47:17,041 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 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) [2022-11-21 16:47:17,043 INFO L175 Difference]: Start difference. First operand has 154 places, 159 transitions, 327 flow. Second operand 5 states and 767 transitions. [2022-11-21 16:47:17,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 173 transitions, 466 flow [2022-11-21 16:47:17,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 173 transitions, 456 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 16:47:17,054 INFO L231 Difference]: Finished difference. Result has 158 places, 154 transitions, 365 flow [2022-11-21 16:47:17,056 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=158, PETRI_TRANSITIONS=154} [2022-11-21 16:47:17,060 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 4 predicate places. [2022-11-21 16:47:17,060 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 154 transitions, 365 flow [2022-11-21 16:47:17,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 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) [2022-11-21 16:47:17,061 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:17,061 INFO L209 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] [2022-11-21 16:47:17,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:47:17,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:17,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:17,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1012410176, now seen corresponding path program 1 times [2022-11-21 16:47:17,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:17,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700361228] [2022-11-21 16:47:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:17,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:17,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700361228] [2022-11-21 16:47:17,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700361228] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:17,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023480023] [2022-11-21 16:47:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:17,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:17,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:47:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:47:17,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:17,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:17,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023480023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:17,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:47:17,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 16:47:17,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743420219] [2022-11-21 16:47:17,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:17,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:47:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:47:17,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:47:17,576 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-21 16:47:17,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 154 transitions, 365 flow. Second operand has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 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) [2022-11-21 16:47:17,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:17,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-21 16:47:17,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:18,254 INFO L130 PetriNetUnfolder]: 56/675 cut-off events. [2022-11-21 16:47:18,255 INFO L131 PetriNetUnfolder]: For 47/52 co-relation queries the response was YES. [2022-11-21 16:47:18,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 675 events. 56/675 cut-off events. For 47/52 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2899 event pairs, 15 based on Foata normal form. 6/586 useless extension candidates. Maximal degree in co-relation 544. Up to 35 conditions per place. [2022-11-21 16:47:18,267 INFO L137 encePairwiseOnDemand]: 165/180 looper letters, 81 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2022-11-21 16:47:18,267 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 239 transitions, 843 flow [2022-11-21 16:47:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:47:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 16:47:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2647 transitions. [2022-11-21 16:47:18,275 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8169753086419753 [2022-11-21 16:47:18,275 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2647 transitions. [2022-11-21 16:47:18,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2647 transitions. [2022-11-21 16:47:18,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:18,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2647 transitions. [2022-11-21 16:47:18,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 147.05555555555554) internal successors, (2647), 18 states have internal predecessors, (2647), 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) [2022-11-21 16:47:18,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 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) [2022-11-21 16:47:18,302 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 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) [2022-11-21 16:47:18,302 INFO L175 Difference]: Start difference. First operand has 158 places, 154 transitions, 365 flow. Second operand 18 states and 2647 transitions. [2022-11-21 16:47:18,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 239 transitions, 843 flow [2022-11-21 16:47:18,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 239 transitions, 838 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:47:18,317 INFO L231 Difference]: Finished difference. Result has 174 places, 181 transitions, 598 flow [2022-11-21 16:47:18,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=598, PETRI_PLACES=174, PETRI_TRANSITIONS=181} [2022-11-21 16:47:18,321 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 20 predicate places. [2022-11-21 16:47:18,321 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 181 transitions, 598 flow [2022-11-21 16:47:18,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 142.66666666666666) internal successors, (1712), 12 states have internal predecessors, (1712), 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) [2022-11-21 16:47:18,324 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:18,324 INFO L209 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] [2022-11-21 16:47:18,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:18,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:18,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1319944917, now seen corresponding path program 1 times [2022-11-21 16:47:18,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:18,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454629956] [2022-11-21 16:47:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:18,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:18,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:18,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454629956] [2022-11-21 16:47:18,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454629956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:18,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716699658] [2022-11-21 16:47:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:18,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:18,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:18,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:18,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:47:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:47:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:18,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:47:18,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716699658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:18,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:47:18,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 16:47:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242884860] [2022-11-21 16:47:18,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:18,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:47:18,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:47:18,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:47:18,907 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-21 16:47:18,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 181 transitions, 598 flow. Second operand has 6 states, 6 states have (on average 142.33333333333334) internal successors, (854), 6 states have internal predecessors, (854), 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) [2022-11-21 16:47:18,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:18,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-21 16:47:18,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:19,188 INFO L130 PetriNetUnfolder]: 56/667 cut-off events. [2022-11-21 16:47:19,188 INFO L131 PetriNetUnfolder]: For 141/146 co-relation queries the response was YES. [2022-11-21 16:47:19,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 667 events. 56/667 cut-off events. For 141/146 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2859 event pairs, 15 based on Foata normal form. 8/580 useless extension candidates. Maximal degree in co-relation 746. Up to 96 conditions per place. [2022-11-21 16:47:19,192 INFO L137 encePairwiseOnDemand]: 169/180 looper letters, 43 selfloop transitions, 27 changer transitions 0/188 dead transitions. [2022-11-21 16:47:19,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 188 transitions, 722 flow [2022-11-21 16:47:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:47:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:47:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1031 transitions. [2022-11-21 16:47:19,196 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8182539682539682 [2022-11-21 16:47:19,196 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1031 transitions. [2022-11-21 16:47:19,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1031 transitions. [2022-11-21 16:47:19,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:19,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1031 transitions. [2022-11-21 16:47:19,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 147.28571428571428) internal successors, (1031), 7 states have internal predecessors, (1031), 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) [2022-11-21 16:47:19,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 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) [2022-11-21 16:47:19,202 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 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) [2022-11-21 16:47:19,202 INFO L175 Difference]: Start difference. First operand has 174 places, 181 transitions, 598 flow. Second operand 7 states and 1031 transitions. [2022-11-21 16:47:19,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 188 transitions, 722 flow [2022-11-21 16:47:19,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 188 transitions, 648 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-21 16:47:19,209 INFO L231 Difference]: Finished difference. Result has 169 places, 173 transitions, 524 flow [2022-11-21 16:47:19,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=524, PETRI_PLACES=169, PETRI_TRANSITIONS=173} [2022-11-21 16:47:19,210 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 15 predicate places. [2022-11-21 16:47:19,211 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 173 transitions, 524 flow [2022-11-21 16:47:19,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 142.33333333333334) internal successors, (854), 6 states have internal predecessors, (854), 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) [2022-11-21 16:47:19,211 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:19,211 INFO L209 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] [2022-11-21 16:47:19,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:19,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-21 16:47:19,427 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:19,427 INFO L85 PathProgramCache]: Analyzing trace with hash 465409555, now seen corresponding path program 1 times [2022-11-21 16:47:19,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:19,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292262610] [2022-11-21 16:47:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:19,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:19,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:19,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292262610] [2022-11-21 16:47:19,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292262610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:19,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:47:19,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:47:19,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442345046] [2022-11-21 16:47:19,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:19,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:47:19,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:47:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:47:19,636 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-21 16:47:19,637 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 173 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:47:19,638 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:19,638 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-21 16:47:19,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:19,949 INFO L130 PetriNetUnfolder]: 276/1147 cut-off events. [2022-11-21 16:47:19,949 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-11-21 16:47:19,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 1147 events. 276/1147 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 6807 event pairs, 70 based on Foata normal form. 0/957 useless extension candidates. Maximal degree in co-relation 1587. Up to 351 conditions per place. [2022-11-21 16:47:19,960 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 26 selfloop transitions, 4 changer transitions 0/188 dead transitions. [2022-11-21 16:47:19,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 188 transitions, 621 flow [2022-11-21 16:47:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:47:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:47:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 802 transitions. [2022-11-21 16:47:19,964 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8911111111111111 [2022-11-21 16:47:19,999 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 802 transitions. [2022-11-21 16:47:19,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 802 transitions. [2022-11-21 16:47:19,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:20,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 802 transitions. [2022-11-21 16:47:20,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 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) [2022-11-21 16:47:20,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 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) [2022-11-21 16:47:20,005 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 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) [2022-11-21 16:47:20,005 INFO L175 Difference]: Start difference. First operand has 169 places, 173 transitions, 524 flow. Second operand 5 states and 802 transitions. [2022-11-21 16:47:20,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 188 transitions, 621 flow [2022-11-21 16:47:20,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 188 transitions, 587 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:47:20,012 INFO L231 Difference]: Finished difference. Result has 171 places, 176 transitions, 520 flow [2022-11-21 16:47:20,012 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=171, PETRI_TRANSITIONS=176} [2022-11-21 16:47:20,013 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 17 predicate places. [2022-11-21 16:47:20,013 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 176 transitions, 520 flow [2022-11-21 16:47:20,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.5) internal successors, (622), 4 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:47:20,014 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:20,014 INFO L209 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] [2022-11-21 16:47:20,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:47:20,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:20,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1195702445, now seen corresponding path program 2 times [2022-11-21 16:47:20,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:20,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012632989] [2022-11-21 16:47:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:20,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:20,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:20,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012632989] [2022-11-21 16:47:20,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012632989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:20,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462399052] [2022-11-21 16:47:20,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:47:20,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:20,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:20,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:20,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:47:20,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:47:20,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:47:20,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 16:47:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 16:47:20,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:20,788 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-21 16:47:20,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462399052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:20,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:47:20,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-21 16:47:20,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197498674] [2022-11-21 16:47:20,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:20,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 16:47:20,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:20,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 16:47:20,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-21 16:47:20,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 180 [2022-11-21 16:47:20,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 176 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 128.61111111111111) internal successors, (2315), 18 states have internal predecessors, (2315), 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) [2022-11-21 16:47:20,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:20,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 180 [2022-11-21 16:47:20,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:22,343 INFO L130 PetriNetUnfolder]: 85/1088 cut-off events. [2022-11-21 16:47:22,343 INFO L131 PetriNetUnfolder]: For 196/203 co-relation queries the response was YES. [2022-11-21 16:47:22,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 1088 events. 85/1088 cut-off events. For 196/203 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 6105 event pairs, 42 based on Foata normal form. 4/994 useless extension candidates. Maximal degree in co-relation 1218. Up to 85 conditions per place. [2022-11-21 16:47:22,352 INFO L137 encePairwiseOnDemand]: 160/180 looper letters, 107 selfloop transitions, 65 changer transitions 0/278 dead transitions. [2022-11-21 16:47:22,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 278 transitions, 1142 flow [2022-11-21 16:47:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-21 16:47:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-21 16:47:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6301 transitions. [2022-11-21 16:47:22,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7143990929705215 [2022-11-21 16:47:22,368 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6301 transitions. [2022-11-21 16:47:22,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6301 transitions. [2022-11-21 16:47:22,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:22,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6301 transitions. [2022-11-21 16:47:22,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 128.59183673469389) internal successors, (6301), 49 states have internal predecessors, (6301), 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) [2022-11-21 16:47:22,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 180.0) internal successors, (9000), 50 states have internal predecessors, (9000), 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) [2022-11-21 16:47:22,412 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 180.0) internal successors, (9000), 50 states have internal predecessors, (9000), 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) [2022-11-21 16:47:22,412 INFO L175 Difference]: Start difference. First operand has 171 places, 176 transitions, 520 flow. Second operand 49 states and 6301 transitions. [2022-11-21 16:47:22,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 278 transitions, 1142 flow [2022-11-21 16:47:22,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 278 transitions, 1140 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:47:22,421 INFO L231 Difference]: Finished difference. Result has 221 places, 201 transitions, 767 flow [2022-11-21 16:47:22,422 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=767, PETRI_PLACES=221, PETRI_TRANSITIONS=201} [2022-11-21 16:47:22,423 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 67 predicate places. [2022-11-21 16:47:22,423 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 201 transitions, 767 flow [2022-11-21 16:47:22,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 128.61111111111111) internal successors, (2315), 18 states have internal predecessors, (2315), 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) [2022-11-21 16:47:22,424 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:22,425 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:22,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:22,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:22,631 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:22,632 INFO L85 PathProgramCache]: Analyzing trace with hash -463800145, now seen corresponding path program 1 times [2022-11-21 16:47:22,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:22,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970036200] [2022-11-21 16:47:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:22,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:22,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:22,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970036200] [2022-11-21 16:47:22,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970036200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:22,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:47:22,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 16:47:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125518319] [2022-11-21 16:47:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:22,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 16:47:22,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 16:47:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 16:47:22,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-21 16:47:22,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 201 transitions, 767 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 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) [2022-11-21 16:47:22,774 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:22,774 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-21 16:47:22,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:23,348 INFO L130 PetriNetUnfolder]: 575/2068 cut-off events. [2022-11-21 16:47:23,348 INFO L131 PetriNetUnfolder]: For 446/453 co-relation queries the response was YES. [2022-11-21 16:47:23,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3696 conditions, 2068 events. 575/2068 cut-off events. For 446/453 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 16617 event pairs, 196 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 3424. Up to 736 conditions per place. [2022-11-21 16:47:23,368 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 25 selfloop transitions, 4 changer transitions 0/215 dead transitions. [2022-11-21 16:47:23,368 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 215 transitions, 856 flow [2022-11-21 16:47:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:47:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 16:47:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 801 transitions. [2022-11-21 16:47:23,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.89 [2022-11-21 16:47:23,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 801 transitions. [2022-11-21 16:47:23,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 801 transitions. [2022-11-21 16:47:23,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:23,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 801 transitions. [2022-11-21 16:47:23,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.2) internal successors, (801), 5 states have internal predecessors, (801), 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) [2022-11-21 16:47:23,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 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) [2022-11-21 16:47:23,378 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 180.0) internal successors, (1080), 6 states have internal predecessors, (1080), 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) [2022-11-21 16:47:23,378 INFO L175 Difference]: Start difference. First operand has 221 places, 201 transitions, 767 flow. Second operand 5 states and 801 transitions. [2022-11-21 16:47:23,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 215 transitions, 856 flow [2022-11-21 16:47:23,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 215 transitions, 773 flow, removed 9 selfloop flow, removed 15 redundant places. [2022-11-21 16:47:23,387 INFO L231 Difference]: Finished difference. Result has 213 places, 204 transitions, 714 flow [2022-11-21 16:47:23,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=714, PETRI_PLACES=213, PETRI_TRANSITIONS=204} [2022-11-21 16:47:23,389 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 59 predicate places. [2022-11-21 16:47:23,389 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 204 transitions, 714 flow [2022-11-21 16:47:23,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 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) [2022-11-21 16:47:23,389 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:23,390 INFO L209 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] [2022-11-21 16:47:23,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:47:23,390 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:23,391 INFO L85 PathProgramCache]: Analyzing trace with hash 114987223, now seen corresponding path program 1 times [2022-11-21 16:47:23,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:23,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217973112] [2022-11-21 16:47:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:23,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:23,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217973112] [2022-11-21 16:47:23,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217973112] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:23,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816980746] [2022-11-21 16:47:23,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:23,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:23,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:23,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:23,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 16:47:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:23,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:47:23,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:24,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:47:24,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816980746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:24,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:47:24,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-21 16:47:24,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286621890] [2022-11-21 16:47:24,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:24,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:47:24,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:24,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:47:24,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:47:24,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 180 [2022-11-21 16:47:24,126 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 204 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 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) [2022-11-21 16:47:24,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:24,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 180 [2022-11-21 16:47:24,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:24,640 INFO L130 PetriNetUnfolder]: 120/1672 cut-off events. [2022-11-21 16:47:24,640 INFO L131 PetriNetUnfolder]: For 392/399 co-relation queries the response was YES. [2022-11-21 16:47:24,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2782 conditions, 1672 events. 120/1672 cut-off events. For 392/399 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 11382 event pairs, 70 based on Foata normal form. 28/1609 useless extension candidates. Maximal degree in co-relation 2378. Up to 244 conditions per place. [2022-11-21 16:47:24,656 INFO L137 encePairwiseOnDemand]: 168/180 looper letters, 75 selfloop transitions, 22 changer transitions 10/238 dead transitions. [2022-11-21 16:47:24,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 238 transitions, 1072 flow [2022-11-21 16:47:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 16:47:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-21 16:47:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1414 transitions. [2022-11-21 16:47:24,662 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7855555555555556 [2022-11-21 16:47:24,662 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1414 transitions. [2022-11-21 16:47:24,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1414 transitions. [2022-11-21 16:47:24,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:24,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1414 transitions. [2022-11-21 16:47:24,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 141.4) internal successors, (1414), 10 states have internal predecessors, (1414), 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) [2022-11-21 16:47:24,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 180.0) internal successors, (1980), 11 states have internal predecessors, (1980), 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) [2022-11-21 16:47:24,673 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 180.0) internal successors, (1980), 11 states have internal predecessors, (1980), 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) [2022-11-21 16:47:24,673 INFO L175 Difference]: Start difference. First operand has 213 places, 204 transitions, 714 flow. Second operand 10 states and 1414 transitions. [2022-11-21 16:47:24,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 238 transitions, 1072 flow [2022-11-21 16:47:24,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 238 transitions, 1070 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 16:47:24,685 INFO L231 Difference]: Finished difference. Result has 223 places, 205 transitions, 770 flow [2022-11-21 16:47:24,685 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=770, PETRI_PLACES=223, PETRI_TRANSITIONS=205} [2022-11-21 16:47:24,686 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 69 predicate places. [2022-11-21 16:47:24,686 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 205 transitions, 770 flow [2022-11-21 16:47:24,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.14285714285714) internal successors, (974), 7 states have internal predecessors, (974), 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) [2022-11-21 16:47:24,687 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:24,687 INFO L209 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] [2022-11-21 16:47:24,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:24,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:24,893 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:24,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:24,894 INFO L85 PathProgramCache]: Analyzing trace with hash 568080778, now seen corresponding path program 1 times [2022-11-21 16:47:24,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:24,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010093480] [2022-11-21 16:47:24,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:24,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:47:25,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010093480] [2022-11-21 16:47:25,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010093480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:25,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158894296] [2022-11-21 16:47:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:25,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:25,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:25,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:25,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 16:47:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:47:25,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:47:25,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:47:25,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158894296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:25,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:47:25,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 16:47:25,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923451414] [2022-11-21 16:47:25,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:25,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:47:25,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:25,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:47:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:47:25,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-21 16:47:25,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 205 transitions, 770 flow. Second operand has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:47:25,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:25,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-21 16:47:25,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:26,788 INFO L130 PetriNetUnfolder]: 1072/4094 cut-off events. [2022-11-21 16:47:26,789 INFO L131 PetriNetUnfolder]: For 1057/1253 co-relation queries the response was YES. [2022-11-21 16:47:26,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9231 conditions, 4094 events. 1072/4094 cut-off events. For 1057/1253 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 36219 event pairs, 175 based on Foata normal form. 91/3849 useless extension candidates. Maximal degree in co-relation 8306. Up to 842 conditions per place. [2022-11-21 16:47:26,830 INFO L137 encePairwiseOnDemand]: 173/180 looper letters, 67 selfloop transitions, 18 changer transitions 0/272 dead transitions. [2022-11-21 16:47:26,830 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 272 transitions, 1172 flow [2022-11-21 16:47:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:47:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 16:47:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2860 transitions. [2022-11-21 16:47:26,841 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8827160493827161 [2022-11-21 16:47:26,841 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2860 transitions. [2022-11-21 16:47:26,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2860 transitions. [2022-11-21 16:47:26,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:26,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2860 transitions. [2022-11-21 16:47:26,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.88888888888889) internal successors, (2860), 18 states have internal predecessors, (2860), 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) [2022-11-21 16:47:26,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 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) [2022-11-21 16:47:26,864 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 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) [2022-11-21 16:47:26,864 INFO L175 Difference]: Start difference. First operand has 223 places, 205 transitions, 770 flow. Second operand 18 states and 2860 transitions. [2022-11-21 16:47:26,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 272 transitions, 1172 flow [2022-11-21 16:47:26,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 272 transitions, 1144 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-21 16:47:26,876 INFO L231 Difference]: Finished difference. Result has 238 places, 217 transitions, 848 flow [2022-11-21 16:47:26,877 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=848, PETRI_PLACES=238, PETRI_TRANSITIONS=217} [2022-11-21 16:47:26,880 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 84 predicate places. [2022-11-21 16:47:26,880 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 217 transitions, 848 flow [2022-11-21 16:47:26,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.66666666666666) internal successors, (1880), 12 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:47:26,881 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:26,882 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:26,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:27,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:27,096 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash 430635579, now seen corresponding path program 1 times [2022-11-21 16:47:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016348229] [2022-11-21 16:47:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:47:27,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:27,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016348229] [2022-11-21 16:47:27,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016348229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:27,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576624114] [2022-11-21 16:47:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:27,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:27,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:27,268 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:27,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 16:47:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:47:27,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:47:27,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:47:27,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576624114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:27,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:47:27,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 16:47:27,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007290036] [2022-11-21 16:47:27,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:27,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:47:27,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:47:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:47:27,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-21 16:47:27,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 217 transitions, 848 flow. Second operand has 6 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:47:27,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:27,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-21 16:47:27,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:28,614 INFO L130 PetriNetUnfolder]: 981/3786 cut-off events. [2022-11-21 16:47:28,614 INFO L131 PetriNetUnfolder]: For 1817/1950 co-relation queries the response was YES. [2022-11-21 16:47:28,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9232 conditions, 3786 events. 981/3786 cut-off events. For 1817/1950 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 33258 event pairs, 91 based on Foata normal form. 119/3618 useless extension candidates. Maximal degree in co-relation 8289. Up to 924 conditions per place. [2022-11-21 16:47:28,662 INFO L137 encePairwiseOnDemand]: 175/180 looper letters, 31 selfloop transitions, 11 changer transitions 0/229 dead transitions. [2022-11-21 16:47:28,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 229 transitions, 962 flow [2022-11-21 16:47:28,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:47:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:47:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1112 transitions. [2022-11-21 16:47:28,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8825396825396825 [2022-11-21 16:47:28,666 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1112 transitions. [2022-11-21 16:47:28,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1112 transitions. [2022-11-21 16:47:28,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:28,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1112 transitions. [2022-11-21 16:47:28,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 158.85714285714286) internal successors, (1112), 7 states have internal predecessors, (1112), 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) [2022-11-21 16:47:28,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 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) [2022-11-21 16:47:28,673 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 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) [2022-11-21 16:47:28,673 INFO L175 Difference]: Start difference. First operand has 238 places, 217 transitions, 848 flow. Second operand 7 states and 1112 transitions. [2022-11-21 16:47:28,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 229 transitions, 962 flow [2022-11-21 16:47:28,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 229 transitions, 930 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-21 16:47:28,693 INFO L231 Difference]: Finished difference. Result has 234 places, 213 transitions, 811 flow [2022-11-21 16:47:28,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=789, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=811, PETRI_PLACES=234, PETRI_TRANSITIONS=213} [2022-11-21 16:47:28,694 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 80 predicate places. [2022-11-21 16:47:28,695 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 213 transitions, 811 flow [2022-11-21 16:47:28,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 156.33333333333334) internal successors, (938), 6 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:47:28,695 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:28,696 INFO L209 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, 1] [2022-11-21 16:47:28,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:28,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:28,914 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1801998332, now seen corresponding path program 1 times [2022-11-21 16:47:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:28,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225437252] [2022-11-21 16:47:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 16:47:29,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:29,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225437252] [2022-11-21 16:47:29,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225437252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826571718] [2022-11-21 16:47:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:29,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:29,082 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:29,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 16:47:29,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 16:47:29,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-21 16:47:29,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:47:29,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826571718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:29,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:47:29,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-21 16:47:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760047260] [2022-11-21 16:47:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 16:47:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 16:47:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-11-21 16:47:29,593 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 180 [2022-11-21 16:47:29,594 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 213 transitions, 811 flow. Second operand has 7 states, 7 states have (on average 139.85714285714286) internal successors, (979), 7 states have internal predecessors, (979), 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) [2022-11-21 16:47:29,594 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:29,594 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 180 [2022-11-21 16:47:29,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:30,394 INFO L130 PetriNetUnfolder]: 194/2469 cut-off events. [2022-11-21 16:47:30,395 INFO L131 PetriNetUnfolder]: For 1119/1137 co-relation queries the response was YES. [2022-11-21 16:47:30,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4699 conditions, 2469 events. 194/2469 cut-off events. For 1119/1137 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 19462 event pairs, 150 based on Foata normal form. 4/2319 useless extension candidates. Maximal degree in co-relation 3939. Up to 472 conditions per place. [2022-11-21 16:47:30,434 INFO L137 encePairwiseOnDemand]: 170/180 looper letters, 62 selfloop transitions, 13 changer transitions 4/218 dead transitions. [2022-11-21 16:47:30,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 218 transitions, 983 flow [2022-11-21 16:47:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 16:47:30,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 16:47:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1130 transitions. [2022-11-21 16:47:30,438 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7847222222222222 [2022-11-21 16:47:30,438 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1130 transitions. [2022-11-21 16:47:30,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1130 transitions. [2022-11-21 16:47:30,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:30,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1130 transitions. [2022-11-21 16:47:30,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 141.25) internal successors, (1130), 8 states have internal predecessors, (1130), 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) [2022-11-21 16:47:30,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 180.0) internal successors, (1620), 9 states have internal predecessors, (1620), 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) [2022-11-21 16:47:30,447 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 180.0) internal successors, (1620), 9 states have internal predecessors, (1620), 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) [2022-11-21 16:47:30,448 INFO L175 Difference]: Start difference. First operand has 234 places, 213 transitions, 811 flow. Second operand 8 states and 1130 transitions. [2022-11-21 16:47:30,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 218 transitions, 983 flow [2022-11-21 16:47:30,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 218 transitions, 969 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:47:30,462 INFO L231 Difference]: Finished difference. Result has 237 places, 212 transitions, 824 flow [2022-11-21 16:47:30,463 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=824, PETRI_PLACES=237, PETRI_TRANSITIONS=212} [2022-11-21 16:47:30,464 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 83 predicate places. [2022-11-21 16:47:30,464 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 212 transitions, 824 flow [2022-11-21 16:47:30,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.85714285714286) internal successors, (979), 7 states have internal predecessors, (979), 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) [2022-11-21 16:47:30,465 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:30,465 INFO L209 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:30,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:30,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 16:47:30,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:30,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1014863807, now seen corresponding path program 1 times [2022-11-21 16:47:30,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:30,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302074921] [2022-11-21 16:47:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:30,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:30,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302074921] [2022-11-21 16:47:30,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302074921] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:30,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258811520] [2022-11-21 16:47:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:30,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:30,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:30,813 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:30,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 16:47:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:47:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:31,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:31,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258811520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:31,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:47:31,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 16:47:31,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116756236] [2022-11-21 16:47:31,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:31,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 16:47:31,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:31,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 16:47:31,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 16:47:31,067 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-21 16:47:31,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 212 transitions, 824 flow. Second operand has 12 states, 12 states have (on average 156.75) internal successors, (1881), 12 states have internal predecessors, (1881), 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) [2022-11-21 16:47:31,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:31,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-21 16:47:31,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:33,125 INFO L130 PetriNetUnfolder]: 2780/7979 cut-off events. [2022-11-21 16:47:33,125 INFO L131 PetriNetUnfolder]: For 6207/6981 co-relation queries the response was YES. [2022-11-21 16:47:33,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19634 conditions, 7979 events. 2780/7979 cut-off events. For 6207/6981 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 85906 event pairs, 312 based on Foata normal form. 198/7211 useless extension candidates. Maximal degree in co-relation 18852. Up to 1712 conditions per place. [2022-11-21 16:47:33,195 INFO L137 encePairwiseOnDemand]: 173/180 looper letters, 63 selfloop transitions, 18 changer transitions 0/275 dead transitions. [2022-11-21 16:47:33,195 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 275 transitions, 1230 flow [2022-11-21 16:47:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 16:47:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 16:47:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2856 transitions. [2022-11-21 16:47:33,201 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8814814814814815 [2022-11-21 16:47:33,201 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2856 transitions. [2022-11-21 16:47:33,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2856 transitions. [2022-11-21 16:47:33,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:33,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2856 transitions. [2022-11-21 16:47:33,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 158.66666666666666) internal successors, (2856), 18 states have internal predecessors, (2856), 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) [2022-11-21 16:47:33,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 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) [2022-11-21 16:47:33,293 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 180.0) internal successors, (3420), 19 states have internal predecessors, (3420), 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) [2022-11-21 16:47:33,294 INFO L175 Difference]: Start difference. First operand has 237 places, 212 transitions, 824 flow. Second operand 18 states and 2856 transitions. [2022-11-21 16:47:33,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 275 transitions, 1230 flow [2022-11-21 16:47:33,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 275 transitions, 1160 flow, removed 22 selfloop flow, removed 7 redundant places. [2022-11-21 16:47:33,317 INFO L231 Difference]: Finished difference. Result has 250 places, 224 transitions, 900 flow [2022-11-21 16:47:33,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=900, PETRI_PLACES=250, PETRI_TRANSITIONS=224} [2022-11-21 16:47:33,318 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 96 predicate places. [2022-11-21 16:47:33,319 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 224 transitions, 900 flow [2022-11-21 16:47:33,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 156.75) internal successors, (1881), 12 states have internal predecessors, (1881), 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) [2022-11-21 16:47:33,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:33,320 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:33,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:33,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:47:33,526 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:33,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1396006286, now seen corresponding path program 1 times [2022-11-21 16:47:33,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:33,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717728930] [2022-11-21 16:47:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:33,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:33,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:33,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717728930] [2022-11-21 16:47:33,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717728930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:33,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389125647] [2022-11-21 16:47:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:33,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:33,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:33,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:33,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 16:47:33,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:33,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:47:33,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:33,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 16:47:33,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389125647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:47:33,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 16:47:33,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 16:47:33,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377143709] [2022-11-21 16:47:33,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:47:33,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 16:47:33,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:33,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 16:47:33,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:47:33,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-21 16:47:33,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 224 transitions, 900 flow. Second operand has 6 states, 6 states have (on average 156.5) internal successors, (939), 6 states have internal predecessors, (939), 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) [2022-11-21 16:47:33,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:33,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-21 16:47:33,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:35,961 INFO L130 PetriNetUnfolder]: 2534/7157 cut-off events. [2022-11-21 16:47:35,962 INFO L131 PetriNetUnfolder]: For 4933/5107 co-relation queries the response was YES. [2022-11-21 16:47:36,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17880 conditions, 7157 events. 2534/7157 cut-off events. For 4933/5107 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 76874 event pairs, 30 based on Foata normal form. 264/6767 useless extension candidates. Maximal degree in co-relation 17096. Up to 2082 conditions per place. [2022-11-21 16:47:36,034 INFO L137 encePairwiseOnDemand]: 175/180 looper letters, 30 selfloop transitions, 11 changer transitions 0/235 dead transitions. [2022-11-21 16:47:36,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 235 transitions, 1004 flow [2022-11-21 16:47:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 16:47:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 16:47:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1111 transitions. [2022-11-21 16:47:36,037 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8817460317460317 [2022-11-21 16:47:36,037 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1111 transitions. [2022-11-21 16:47:36,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1111 transitions. [2022-11-21 16:47:36,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:36,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1111 transitions. [2022-11-21 16:47:36,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 158.71428571428572) internal successors, (1111), 7 states have internal predecessors, (1111), 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) [2022-11-21 16:47:36,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 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) [2022-11-21 16:47:36,044 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 180.0) internal successors, (1440), 8 states have internal predecessors, (1440), 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) [2022-11-21 16:47:36,044 INFO L175 Difference]: Start difference. First operand has 250 places, 224 transitions, 900 flow. Second operand 7 states and 1111 transitions. [2022-11-21 16:47:36,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 235 transitions, 1004 flow [2022-11-21 16:47:36,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 235 transitions, 972 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-21 16:47:36,088 INFO L231 Difference]: Finished difference. Result has 246 places, 220 transitions, 863 flow [2022-11-21 16:47:36,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=246, PETRI_TRANSITIONS=220} [2022-11-21 16:47:36,089 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 92 predicate places. [2022-11-21 16:47:36,090 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 220 transitions, 863 flow [2022-11-21 16:47:36,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 156.5) internal successors, (939), 6 states have internal predecessors, (939), 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) [2022-11-21 16:47:36,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:36,091 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:36,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:36,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:36,298 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1671571543, now seen corresponding path program 1 times [2022-11-21 16:47:36,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:36,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140423161] [2022-11-21 16:47:36,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:36,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:36,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:36,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140423161] [2022-11-21 16:47:36,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140423161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:36,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230509813] [2022-11-21 16:47:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:36,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:36,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:36,738 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:36,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 16:47:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:36,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 16:47:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:37,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:47:37,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230509813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:37,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:47:37,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-21 16:47:37,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071700032] [2022-11-21 16:47:37,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:37,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-21 16:47:37,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:37,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-21 16:47:37,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-11-21 16:47:37,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2022-11-21 16:47:37,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 220 transitions, 863 flow. Second operand has 32 states, 32 states have (on average 143.28125) internal successors, (4585), 32 states have internal predecessors, (4585), 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) [2022-11-21 16:47:37,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:37,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2022-11-21 16:47:37,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:40,757 INFO L130 PetriNetUnfolder]: 912/9108 cut-off events. [2022-11-21 16:47:40,757 INFO L131 PetriNetUnfolder]: For 4314/4440 co-relation queries the response was YES. [2022-11-21 16:47:40,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17650 conditions, 9108 events. 912/9108 cut-off events. For 4314/4440 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 95509 event pairs, 770 based on Foata normal form. 16/8480 useless extension candidates. Maximal degree in co-relation 15968. Up to 1262 conditions per place. [2022-11-21 16:47:40,912 INFO L137 encePairwiseOnDemand]: 168/180 looper letters, 224 selfloop transitions, 102 changer transitions 0/472 dead transitions. [2022-11-21 16:47:40,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 472 transitions, 2532 flow [2022-11-21 16:47:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 16:47:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-21 16:47:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 6494 transitions. [2022-11-21 16:47:40,924 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.819949494949495 [2022-11-21 16:47:40,925 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 6494 transitions. [2022-11-21 16:47:40,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 6494 transitions. [2022-11-21 16:47:40,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:40,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 6494 transitions. [2022-11-21 16:47:40,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 147.5909090909091) internal successors, (6494), 44 states have internal predecessors, (6494), 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) [2022-11-21 16:47:40,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 180.0) internal successors, (8100), 45 states have internal predecessors, (8100), 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) [2022-11-21 16:47:40,953 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 180.0) internal successors, (8100), 45 states have internal predecessors, (8100), 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) [2022-11-21 16:47:40,953 INFO L175 Difference]: Start difference. First operand has 246 places, 220 transitions, 863 flow. Second operand 44 states and 6494 transitions. [2022-11-21 16:47:40,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 472 transitions, 2532 flow [2022-11-21 16:47:41,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 472 transitions, 2518 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-21 16:47:41,015 INFO L231 Difference]: Finished difference. Result has 293 places, 280 transitions, 1502 flow [2022-11-21 16:47:41,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1502, PETRI_PLACES=293, PETRI_TRANSITIONS=280} [2022-11-21 16:47:41,017 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 139 predicate places. [2022-11-21 16:47:41,017 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 280 transitions, 1502 flow [2022-11-21 16:47:41,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 143.28125) internal successors, (4585), 32 states have internal predecessors, (4585), 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) [2022-11-21 16:47:41,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:41,019 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:41,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 16:47:41,226 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1589000027, now seen corresponding path program 1 times [2022-11-21 16:47:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:41,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793258823] [2022-11-21 16:47:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:41,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:41,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:41,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793258823] [2022-11-21 16:47:41,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793258823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:41,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16082347] [2022-11-21 16:47:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:41,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:41,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:41,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:41,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 16:47:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 16:47:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:41,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:41,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16082347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:41,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:47:41,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-21 16:47:41,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672291010] [2022-11-21 16:47:41,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:41,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 16:47:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 16:47:41,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-21 16:47:41,976 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 180 [2022-11-21 16:47:41,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 280 transitions, 1502 flow. Second operand has 24 states, 24 states have (on average 157.08333333333334) internal successors, (3770), 24 states have internal predecessors, (3770), 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) [2022-11-21 16:47:41,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:41,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 180 [2022-11-21 16:47:41,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:47:49,695 INFO L130 PetriNetUnfolder]: 8332/23990 cut-off events. [2022-11-21 16:47:49,695 INFO L131 PetriNetUnfolder]: For 14196/14644 co-relation queries the response was YES. [2022-11-21 16:47:49,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60949 conditions, 23990 events. 8332/23990 cut-off events. For 14196/14644 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 272818 event pairs, 574 based on Foata normal form. 588/23010 useless extension candidates. Maximal degree in co-relation 59022. Up to 8080 conditions per place. [2022-11-21 16:47:49,987 INFO L137 encePairwiseOnDemand]: 174/180 looper letters, 131 selfloop transitions, 32 changer transitions 0/417 dead transitions. [2022-11-21 16:47:49,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 417 transitions, 2330 flow [2022-11-21 16:47:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 16:47:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-21 16:47:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 5097 transitions. [2022-11-21 16:47:49,995 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8848958333333333 [2022-11-21 16:47:49,995 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 5097 transitions. [2022-11-21 16:47:49,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 5097 transitions. [2022-11-21 16:47:49,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:47:49,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 5097 transitions. [2022-11-21 16:47:50,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 159.28125) internal successors, (5097), 32 states have internal predecessors, (5097), 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) [2022-11-21 16:47:50,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 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) [2022-11-21 16:47:50,016 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 180.0) internal successors, (5940), 33 states have internal predecessors, (5940), 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) [2022-11-21 16:47:50,016 INFO L175 Difference]: Start difference. First operand has 293 places, 280 transitions, 1502 flow. Second operand 32 states and 5097 transitions. [2022-11-21 16:47:50,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 417 transitions, 2330 flow [2022-11-21 16:47:50,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 417 transitions, 2263 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-11-21 16:47:50,108 INFO L231 Difference]: Finished difference. Result has 316 places, 299 transitions, 1627 flow [2022-11-21 16:47:50,109 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1627, PETRI_PLACES=316, PETRI_TRANSITIONS=299} [2022-11-21 16:47:50,109 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 162 predicate places. [2022-11-21 16:47:50,110 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 299 transitions, 1627 flow [2022-11-21 16:47:50,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 157.08333333333334) internal successors, (3770), 24 states have internal predecessors, (3770), 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) [2022-11-21 16:47:50,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:47:50,111 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:47:50,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 16:47:50,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 16:47:50,319 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:47:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:47:50,319 INFO L85 PathProgramCache]: Analyzing trace with hash 80890487, now seen corresponding path program 2 times [2022-11-21 16:47:50,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:47:50,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516134384] [2022-11-21 16:47:50,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:47:50,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:47:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:47:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:47:50,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:47:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516134384] [2022-11-21 16:47:50,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516134384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:47:50,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172505415] [2022-11-21 16:47:50,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:47:50,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:47:50,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:47:50,627 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:47:50,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 16:47:50,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:47:50,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:47:50,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:47:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:47:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-21 16:47:51,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:47:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-21 16:47:51,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172505415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:47:51,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:47:51,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2022-11-21 16:47:51,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584723038] [2022-11-21 16:47:51,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:47:51,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 16:47:51,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:47:51,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 16:47:51,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-21 16:47:51,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 180 [2022-11-21 16:47:51,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 299 transitions, 1627 flow. Second operand has 16 states, 16 states have (on average 150.5625) internal successors, (2409), 16 states have internal predecessors, (2409), 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) [2022-11-21 16:47:51,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:47:51,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 180 [2022-11-21 16:47:51,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 16:48:13,519 INFO L130 PetriNetUnfolder]: 32104/78870 cut-off events. [2022-11-21 16:48:13,519 INFO L131 PetriNetUnfolder]: For 36030/36030 co-relation queries the response was YES. [2022-11-21 16:48:14,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186565 conditions, 78870 events. 32104/78870 cut-off events. For 36030/36030 co-relation queries the response was YES. Maximal size of possible extension queue 1235. Compared 958608 event pairs, 1722 based on Foata normal form. 1260/66676 useless extension candidates. Maximal degree in co-relation 184038. Up to 11790 conditions per place. [2022-11-21 16:48:14,474 INFO L137 encePairwiseOnDemand]: 171/180 looper letters, 73 selfloop transitions, 23 changer transitions 42/400 dead transitions. [2022-11-21 16:48:14,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 400 transitions, 2175 flow [2022-11-21 16:48:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 16:48:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-21 16:48:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3370 transitions. [2022-11-21 16:48:14,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.851010101010101 [2022-11-21 16:48:14,481 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3370 transitions. [2022-11-21 16:48:14,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3370 transitions. [2022-11-21 16:48:14,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 16:48:14,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3370 transitions. [2022-11-21 16:48:14,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 153.1818181818182) internal successors, (3370), 22 states have internal predecessors, (3370), 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) [2022-11-21 16:48:14,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 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) [2022-11-21 16:48:14,496 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 180.0) internal successors, (4140), 23 states have internal predecessors, (4140), 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) [2022-11-21 16:48:14,496 INFO L175 Difference]: Start difference. First operand has 316 places, 299 transitions, 1627 flow. Second operand 22 states and 3370 transitions. [2022-11-21 16:48:14,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 400 transitions, 2175 flow [2022-11-21 16:48:15,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 400 transitions, 2129 flow, removed 8 selfloop flow, removed 15 redundant places. [2022-11-21 16:48:15,884 INFO L231 Difference]: Finished difference. Result has 322 places, 297 transitions, 1635 flow [2022-11-21 16:48:15,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=1571, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1635, PETRI_PLACES=322, PETRI_TRANSITIONS=297} [2022-11-21 16:48:15,885 INFO L288 CegarLoopForPetriNet]: 154 programPoint places, 168 predicate places. [2022-11-21 16:48:15,885 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 297 transitions, 1635 flow [2022-11-21 16:48:15,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 150.5625) internal successors, (2409), 16 states have internal predecessors, (2409), 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) [2022-11-21 16:48:15,886 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 16:48:15,887 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 16:48:15,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 16:48:16,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:48:16,092 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 11 more)] === [2022-11-21 16:48:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:48:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1034227675, now seen corresponding path program 2 times [2022-11-21 16:48:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:48:16,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266306707] [2022-11-21 16:48:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:48:16,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:48:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:48:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 16:48:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:48:16,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266306707] [2022-11-21 16:48:16,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266306707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:48:16,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093564163] [2022-11-21 16:48:16,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 16:48:16,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:48:16,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:48:16,890 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:48:16,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad169c7e-78c7-465a-97d5-2915a78bb0dd/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 16:48:17,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 16:48:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 16:48:17,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 16:48:17,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:48:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-21 16:48:17,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:48:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2022-11-21 16:48:17,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093564163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:48:17,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:48:17,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 5, 5] total 27 [2022-11-21 16:48:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560934054] [2022-11-21 16:48:17,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:48:17,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 16:48:17,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:48:17,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 16:48:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2022-11-21 16:48:17,663 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 180 [2022-11-21 16:48:17,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 297 transitions, 1635 flow. Second operand has 28 states, 28 states have (on average 150.46428571428572) internal successors, (4213), 28 states have internal predecessors, (4213), 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) [2022-11-21 16:48:17,667 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 16:48:17,667 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 180 [2022-11-21 16:48:17,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand