./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b 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_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN --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 0bf2f5f336333cdf96c271b32cdeb9b70ee932e1c07acf27a63b4425ec902f3e --- 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-6b4ec56 [2022-11-20 09:28:19,496 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:28:19,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:28:19,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:28:19,538 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:28:19,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:28:19,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:28:19,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:28:19,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:28:19,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:28:19,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:28:19,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:28:19,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:28:19,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:28:19,553 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:28:19,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:28:19,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:28:19,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:28:19,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:28:19,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:28:19,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:28:19,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:28:19,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:28:19,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:28:19,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:28:19,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:28:19,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:28:19,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:28:19,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:28:19,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:28:19,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:28:19,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:28:19,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:28:19,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:28:19,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:28:19,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:28:19,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:28:19,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:28:19,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:28:19,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:28:19,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:28:19,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 09:28:19,618 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:28:19,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:28:19,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:28:19,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:28:19,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:28:19,620 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:28:19,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:28:19,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:28:19,622 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:28:19,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:28:19,622 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:28:19,623 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 09:28:19,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:28:19,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:28:19,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:28:19,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:28:19,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:28:19,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:28:19,625 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 09:28:19,625 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:28:19,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:28:19,625 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:28:19,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:28:19,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:28:19,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:28:19,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:28:19,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:28:19,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:28:19,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:28:19,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:28:19,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:28:19,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:28:19,629 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:28:19,629 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:28:19,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:28:19,630 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_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bf2f5f336333cdf96c271b32cdeb9b70ee932e1c07acf27a63b4425ec902f3e [2022-11-20 09:28:19,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:28:19,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:28:19,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:28:19,947 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:28:19,948 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:28:19,950 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i [2022-11-20 09:28:23,187 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:28:23,564 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:28:23,565 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/sv-benchmarks/c/goblint-regression/04-mutex_36-trylock_nr.i [2022-11-20 09:28:23,596 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/data/b6efcec4f/1b6257c579244dd08d2dc29c9551961c/FLAG21d140e2f [2022-11-20 09:28:23,619 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/data/b6efcec4f/1b6257c579244dd08d2dc29c9551961c [2022-11-20 09:28:23,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:28:23,627 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:28:23,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:28:23,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:28:23,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:28:23,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:23" (1/1) ... [2022-11-20 09:28:23,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c03aa2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:23, skipping insertion in model container [2022-11-20 09:28:23,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:23" (1/1) ... [2022-11-20 09:28:23,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:28:23,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:28:24,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:28:24,752 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:28:24,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:28:25,051 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:28:25,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25 WrapperNode [2022-11-20 09:28:25,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:28:25,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:28:25,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:28:25,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:28:25,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,117 INFO L138 Inliner]: procedures = 524, calls = 61, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 125 [2022-11-20 09:28:25,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:28:25,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:28:25,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:28:25,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:28:25,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,180 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,184 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:28:25,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:28:25,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:28:25,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:28:25,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (1/1) ... [2022-11-20 09:28:25,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:28:25,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:25,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:28:25,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:28:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure counter_thread [2022-11-20 09:28:25,301 INFO L138 BoogieDeclarations]: Found implementation of procedure counter_thread [2022-11-20 09:28:25,301 INFO L130 BoogieDeclarations]: Found specification of procedure sleep [2022-11-20 09:28:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure monitor_thread [2022-11-20 09:28:25,302 INFO L138 BoogieDeclarations]: Found implementation of procedure monitor_thread [2022-11-20 09:28:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2022-11-20 09:28:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 09:28:25,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 09:28:25,303 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 09:28:25,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:28:25,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:28:25,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:28:25,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 09:28:25,304 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-11-20 09:28:25,304 INFO L130 BoogieDeclarations]: Found specification of procedure time [2022-11-20 09:28:25,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 09:28:25,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:28:25,306 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 09:28:25,680 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:28:25,682 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:28:26,025 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:28:26,035 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:28:26,036 INFO L300 CfgBuilder]: Removed 19 assume(true) statements. [2022-11-20 09:28:26,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:28:26 BoogieIcfgContainer [2022-11-20 09:28:26,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:28:26,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:28:26,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:28:26,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:28:26,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:28:23" (1/3) ... [2022-11-20 09:28:26,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea8d0a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:28:26, skipping insertion in model container [2022-11-20 09:28:26,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25" (2/3) ... [2022-11-20 09:28:26,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea8d0a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:28:26, skipping insertion in model container [2022-11-20 09:28:26,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:28:26" (3/3) ... [2022-11-20 09:28:26,049 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_36-trylock_nr.i [2022-11-20 09:28:26,058 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 09:28:26,069 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:28:26,069 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-20 09:28:26,069 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 09:28:26,156 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 09:28:26,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 238 transitions, 492 flow [2022-11-20 09:28:26,301 INFO L130 PetriNetUnfolder]: 32/236 cut-off events. [2022-11-20 09:28:26,302 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 09:28:26,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 236 events. 32/236 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 493 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 142. Up to 5 conditions per place. [2022-11-20 09:28:26,310 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 238 transitions, 492 flow [2022-11-20 09:28:26,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 189 places, 210 transitions, 429 flow [2022-11-20 09:28:26,327 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:28:26,334 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;@5918f0b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:28:26,334 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-20 09:28:26,348 INFO L130 PetriNetUnfolder]: 0/52 cut-off events. [2022-11-20 09:28:26,348 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 09:28:26,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:26,349 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] [2022-11-20 09:28:26,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:26,356 INFO L85 PathProgramCache]: Analyzing trace with hash 929933902, now seen corresponding path program 1 times [2022-11-20 09:28:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:26,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789687140] [2022-11-20 09:28:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:26,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:26,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:26,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789687140] [2022-11-20 09:28:26,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789687140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:26,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:26,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:28:26,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64747744] [2022-11-20 09:28:26,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:26,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 09:28:26,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 09:28:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 09:28:27,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 238 [2022-11-20 09:28:27,022 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 210 transitions, 429 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,022 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:27,022 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 238 [2022-11-20 09:28:27,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:27,121 INFO L130 PetriNetUnfolder]: 4/178 cut-off events. [2022-11-20 09:28:27,122 INFO L131 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2022-11-20 09:28:27,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 178 events. 4/178 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 368 event pairs, 0 based on Foata normal form. 20/178 useless extension candidates. Maximal degree in co-relation 126. Up to 8 conditions per place. [2022-11-20 09:28:27,130 INFO L137 encePairwiseOnDemand]: 219/238 looper letters, 9 selfloop transitions, 1 changer transitions 0/178 dead transitions. [2022-11-20 09:28:27,130 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 178 transitions, 385 flow [2022-11-20 09:28:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 09:28:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-20 09:28:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 622 transitions. [2022-11-20 09:28:27,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8711484593837535 [2022-11-20 09:28:27,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 622 transitions. [2022-11-20 09:28:27,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 622 transitions. [2022-11-20 09:28:27,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:27,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 622 transitions. [2022-11-20 09:28:27,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.33333333333334) internal successors, (622), 3 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) [2022-11-20 09:28:27,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,183 INFO L175 Difference]: Start difference. First operand has 189 places, 210 transitions, 429 flow. Second operand 3 states and 622 transitions. [2022-11-20 09:28:27,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 178 transitions, 385 flow [2022-11-20 09:28:27,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 178 transitions, 380 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 09:28:27,196 INFO L231 Difference]: Finished difference. Result has 180 places, 178 transitions, 362 flow [2022-11-20 09:28:27,198 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=362, PETRI_PLACES=180, PETRI_TRANSITIONS=178} [2022-11-20 09:28:27,207 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -9 predicate places. [2022-11-20 09:28:27,207 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 178 transitions, 362 flow [2022-11-20 09:28:27,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,208 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:27,208 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] [2022-11-20 09:28:27,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 09:28:27,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:27,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:27,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1236819630, now seen corresponding path program 1 times [2022-11-20 09:28:27,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:27,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747713438] [2022-11-20 09:28:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:27,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:27,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:27,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747713438] [2022-11-20 09:28:27,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747713438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:27,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:27,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:27,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407501604] [2022-11-20 09:28:27,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:27,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:27,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:27,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:27,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:27,431 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 238 [2022-11-20 09:28:27,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 178 transitions, 362 flow. Second operand has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:27,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 238 [2022-11-20 09:28:27,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:27,497 INFO L130 PetriNetUnfolder]: 4/177 cut-off events. [2022-11-20 09:28:27,498 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 09:28:27,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 177 events. 4/177 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 367 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2022-11-20 09:28:27,500 INFO L137 encePairwiseOnDemand]: 234/238 looper letters, 9 selfloop transitions, 3 changer transitions 0/177 dead transitions. [2022-11-20 09:28:27,500 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 177 transitions, 384 flow [2022-11-20 09:28:27,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:28:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:28:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 988 transitions. [2022-11-20 09:28:27,504 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8302521008403362 [2022-11-20 09:28:27,504 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 988 transitions. [2022-11-20 09:28:27,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 988 transitions. [2022-11-20 09:28:27,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:27,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 988 transitions. [2022-11-20 09:28:27,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 197.6) internal successors, (988), 5 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,514 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,514 INFO L175 Difference]: Start difference. First operand has 180 places, 178 transitions, 362 flow. Second operand 5 states and 988 transitions. [2022-11-20 09:28:27,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 177 transitions, 384 flow [2022-11-20 09:28:27,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 177 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:27,520 INFO L231 Difference]: Finished difference. Result has 182 places, 177 transitions, 365 flow [2022-11-20 09:28:27,520 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=365, PETRI_PLACES=182, PETRI_TRANSITIONS=177} [2022-11-20 09:28:27,521 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -7 predicate places. [2022-11-20 09:28:27,521 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 177 transitions, 365 flow [2022-11-20 09:28:27,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:27,524 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] [2022-11-20 09:28:27,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 09:28:27,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:27,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1141237926, now seen corresponding path program 1 times [2022-11-20 09:28:27,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:27,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713018910] [2022-11-20 09:28:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:27,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713018910] [2022-11-20 09:28:27,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713018910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:27,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:27,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:27,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304280521] [2022-11-20 09:28:27,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:27,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:27,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:27,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 238 [2022-11-20 09:28:27,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 177 transitions, 365 flow. Second operand has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:27,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:27,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 238 [2022-11-20 09:28:27,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:28,137 INFO L130 PetriNetUnfolder]: 70/582 cut-off events. [2022-11-20 09:28:28,138 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-20 09:28:28,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 747 conditions, 582 events. 70/582 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3163 event pairs, 2 based on Foata normal form. 0/488 useless extension candidates. Maximal degree in co-relation 689. Up to 93 conditions per place. [2022-11-20 09:28:28,143 INFO L137 encePairwiseOnDemand]: 230/238 looper letters, 28 selfloop transitions, 4 changer transitions 0/194 dead transitions. [2022-11-20 09:28:28,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 194 transitions, 470 flow [2022-11-20 09:28:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:28:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:28:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1013 transitions. [2022-11-20 09:28:28,149 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8512605042016806 [2022-11-20 09:28:28,149 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1013 transitions. [2022-11-20 09:28:28,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1013 transitions. [2022-11-20 09:28:28,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:28,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1013 transitions. [2022-11-20 09:28:28,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 202.6) internal successors, (1013), 5 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,157 INFO L175 Difference]: Start difference. First operand has 182 places, 177 transitions, 365 flow. Second operand 5 states and 1013 transitions. [2022-11-20 09:28:28,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 194 transitions, 470 flow [2022-11-20 09:28:28,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 194 transitions, 465 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 09:28:28,167 INFO L231 Difference]: Finished difference. Result has 186 places, 180 transitions, 398 flow [2022-11-20 09:28:28,167 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=186, PETRI_TRANSITIONS=180} [2022-11-20 09:28:28,170 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, -3 predicate places. [2022-11-20 09:28:28,170 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 180 transitions, 398 flow [2022-11-20 09:28:28,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 196.0) internal successors, (784), 4 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,172 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:28,172 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] [2022-11-20 09:28:28,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 09:28:28,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:28,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1302082530, now seen corresponding path program 1 times [2022-11-20 09:28:28,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:28,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28099531] [2022-11-20 09:28:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:28,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:28,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28099531] [2022-11-20 09:28:28,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28099531] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:28,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:28,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:28,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108714908] [2022-11-20 09:28:28,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:28,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:28,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:28,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:28,478 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 238 [2022-11-20 09:28:28,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 180 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 197.5) internal successors, (790), 4 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:28,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 238 [2022-11-20 09:28:28,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:28,649 INFO L130 PetriNetUnfolder]: 40/351 cut-off events. [2022-11-20 09:28:28,649 INFO L131 PetriNetUnfolder]: For 25/27 co-relation queries the response was YES. [2022-11-20 09:28:28,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 351 events. 40/351 cut-off events. For 25/27 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1602 event pairs, 26 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 484. Up to 45 conditions per place. [2022-11-20 09:28:28,654 INFO L137 encePairwiseOnDemand]: 231/238 looper letters, 19 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2022-11-20 09:28:28,654 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 189 transitions, 468 flow [2022-11-20 09:28:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:28:28,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:28:28,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1006 transitions. [2022-11-20 09:28:28,657 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8453781512605042 [2022-11-20 09:28:28,657 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1006 transitions. [2022-11-20 09:28:28,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1006 transitions. [2022-11-20 09:28:28,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:28,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1006 transitions. [2022-11-20 09:28:28,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.2) internal successors, (1006), 5 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,668 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,668 INFO L175 Difference]: Start difference. First operand has 186 places, 180 transitions, 398 flow. Second operand 5 states and 1006 transitions. [2022-11-20 09:28:28,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 189 transitions, 468 flow [2022-11-20 09:28:28,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 189 transitions, 466 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:28,673 INFO L231 Difference]: Finished difference. Result has 192 places, 183 transitions, 428 flow [2022-11-20 09:28:28,679 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=428, PETRI_PLACES=192, PETRI_TRANSITIONS=183} [2022-11-20 09:28:28,681 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 3 predicate places. [2022-11-20 09:28:28,681 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 183 transitions, 428 flow [2022-11-20 09:28:28,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.5) internal successors, (790), 4 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:28,682 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:28,682 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] [2022-11-20 09:28:28,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 09:28:28,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:28,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1179614466, now seen corresponding path program 1 times [2022-11-20 09:28:28,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:28,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510436636] [2022-11-20 09:28:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:28,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:28,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510436636] [2022-11-20 09:28:28,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510436636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:28,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:28,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066411784] [2022-11-20 09:28:28,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:28,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:28,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 238 [2022-11-20 09:28:28,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 183 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 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) [2022-11-20 09:28:28,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:28,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 238 [2022-11-20 09:28:28,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:29,128 INFO L130 PetriNetUnfolder]: 73/586 cut-off events. [2022-11-20 09:28:29,128 INFO L131 PetriNetUnfolder]: For 76/89 co-relation queries the response was YES. [2022-11-20 09:28:29,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 831 conditions, 586 events. 73/586 cut-off events. For 76/89 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3692 event pairs, 46 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 769. Up to 72 conditions per place. [2022-11-20 09:28:29,136 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 15 selfloop transitions, 4 changer transitions 0/191 dead transitions. [2022-11-20 09:28:29,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 191 transitions, 485 flow [2022-11-20 09:28:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:28:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:28:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1016 transitions. [2022-11-20 09:28:29,140 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.853781512605042 [2022-11-20 09:28:29,140 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1016 transitions. [2022-11-20 09:28:29,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1016 transitions. [2022-11-20 09:28:29,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:29,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1016 transitions. [2022-11-20 09:28:29,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.2) internal successors, (1016), 5 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:29,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:29,147 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:29,148 INFO L175 Difference]: Start difference. First operand has 192 places, 183 transitions, 428 flow. Second operand 5 states and 1016 transitions. [2022-11-20 09:28:29,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 191 transitions, 485 flow [2022-11-20 09:28:29,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 191 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:29,154 INFO L231 Difference]: Finished difference. Result has 198 places, 186 transitions, 456 flow [2022-11-20 09:28:29,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=426, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=456, PETRI_PLACES=198, PETRI_TRANSITIONS=186} [2022-11-20 09:28:29,155 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 9 predicate places. [2022-11-20 09:28:29,156 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 186 transitions, 456 flow [2022-11-20 09:28:29,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.25) internal successors, (801), 4 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) [2022-11-20 09:28:29,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:29,157 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-20 09:28:29,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 09:28:29,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -608750972, now seen corresponding path program 1 times [2022-11-20 09:28:29,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:29,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007009860] [2022-11-20 09:28:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:29,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:29,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:29,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007009860] [2022-11-20 09:28:29,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007009860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:29,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612110908] [2022-11-20 09:28:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:29,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:29,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:29,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:29,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:28:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:29,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:29,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:29,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:30,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:30,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612110908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:30,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:30,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 09:28:30,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302747569] [2022-11-20 09:28:30,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:30,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:28:30,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:30,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:28:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:28:30,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 238 [2022-11-20 09:28:30,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 186 transitions, 456 flow. Second operand has 12 states, 12 states have (on average 197.0) internal successors, (2364), 12 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:30,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:30,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 238 [2022-11-20 09:28:30,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:31,395 INFO L130 PetriNetUnfolder]: 620/3204 cut-off events. [2022-11-20 09:28:31,396 INFO L131 PetriNetUnfolder]: For 905/1033 co-relation queries the response was YES. [2022-11-20 09:28:31,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5592 conditions, 3204 events. 620/3204 cut-off events. For 905/1033 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 29054 event pairs, 24 based on Foata normal form. 183/3137 useless extension candidates. Maximal degree in co-relation 5526. Up to 363 conditions per place. [2022-11-20 09:28:31,431 INFO L137 encePairwiseOnDemand]: 229/238 looper letters, 83 selfloop transitions, 47 changer transitions 0/298 dead transitions. [2022-11-20 09:28:31,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 298 transitions, 1093 flow [2022-11-20 09:28:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 09:28:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-20 09:28:31,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4829 transitions. [2022-11-20 09:28:31,442 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8454131652661064 [2022-11-20 09:28:31,442 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4829 transitions. [2022-11-20 09:28:31,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4829 transitions. [2022-11-20 09:28:31,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:31,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4829 transitions. [2022-11-20 09:28:31,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 201.20833333333334) internal successors, (4829), 24 states have internal predecessors, (4829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 238.0) internal successors, (5950), 25 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,538 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 238.0) internal successors, (5950), 25 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,538 INFO L175 Difference]: Start difference. First operand has 198 places, 186 transitions, 456 flow. Second operand 24 states and 4829 transitions. [2022-11-20 09:28:31,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 298 transitions, 1093 flow [2022-11-20 09:28:31,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 298 transitions, 1091 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-20 09:28:31,548 INFO L231 Difference]: Finished difference. Result has 238 places, 227 transitions, 864 flow [2022-11-20 09:28:31,548 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=864, PETRI_PLACES=238, PETRI_TRANSITIONS=227} [2022-11-20 09:28:31,549 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 49 predicate places. [2022-11-20 09:28:31,549 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 227 transitions, 864 flow [2022-11-20 09:28:31,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 197.0) internal successors, (2364), 12 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:31,551 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:31,551 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] [2022-11-20 09:28:31,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:31,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:31,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting counter_threadErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:31,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1691410226, now seen corresponding path program 1 times [2022-11-20 09:28:31,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:31,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764171308] [2022-11-20 09:28:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:32,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:32,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764171308] [2022-11-20 09:28:32,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764171308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:32,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612874422] [2022-11-20 09:28:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:32,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:32,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:32,154 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:32,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:28:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:32,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:32,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:32,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:32,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612874422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:32,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:28:32,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 09:28:32,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030653333] [2022-11-20 09:28:32,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:32,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:32,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:32,477 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 238 [2022-11-20 09:28:32,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 227 transitions, 864 flow. Second operand has 6 states, 6 states have (on average 196.66666666666666) internal successors, (1180), 6 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:32,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:32,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 238 [2022-11-20 09:28:32,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:33,245 INFO L130 PetriNetUnfolder]: 300/2056 cut-off events. [2022-11-20 09:28:33,246 INFO L131 PetriNetUnfolder]: For 4416/4492 co-relation queries the response was YES. [2022-11-20 09:28:33,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4120 conditions, 2056 events. 300/2056 cut-off events. For 4416/4492 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 17794 event pairs, 21 based on Foata normal form. 147/2020 useless extension candidates. Maximal degree in co-relation 4035. Up to 404 conditions per place. [2022-11-20 09:28:33,274 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 30 selfloop transitions, 11 changer transitions 0/209 dead transitions. [2022-11-20 09:28:33,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 209 transitions, 728 flow [2022-11-20 09:28:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:28:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1401 transitions. [2022-11-20 09:28:33,279 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.84093637454982 [2022-11-20 09:28:33,280 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1401 transitions. [2022-11-20 09:28:33,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1401 transitions. [2022-11-20 09:28:33,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:33,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1401 transitions. [2022-11-20 09:28:33,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 200.14285714285714) internal successors, (1401), 7 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,291 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,291 INFO L175 Difference]: Start difference. First operand has 238 places, 227 transitions, 864 flow. Second operand 7 states and 1401 transitions. [2022-11-20 09:28:33,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 209 transitions, 728 flow [2022-11-20 09:28:33,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 209 transitions, 678 flow, removed 21 selfloop flow, removed 12 redundant places. [2022-11-20 09:28:33,312 INFO L231 Difference]: Finished difference. Result has 220 places, 193 transitions, 553 flow [2022-11-20 09:28:33,313 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=553, PETRI_PLACES=220, PETRI_TRANSITIONS=193} [2022-11-20 09:28:33,314 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 31 predicate places. [2022-11-20 09:28:33,314 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 193 transitions, 553 flow [2022-11-20 09:28:33,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.66666666666666) internal successors, (1180), 6 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:33,315 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:33,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:33,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 09:28:33,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting counter_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:33,523 INFO L85 PathProgramCache]: Analyzing trace with hash 994777908, now seen corresponding path program 1 times [2022-11-20 09:28:33,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:33,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676044514] [2022-11-20 09:28:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:33,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 09:28:33,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:33,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676044514] [2022-11-20 09:28:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676044514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:33,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:28:33,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97380694] [2022-11-20 09:28:33,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:33,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:28:33,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:33,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:28:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:28:33,677 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 238 [2022-11-20 09:28:33,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 193 transitions, 553 flow. Second operand has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:33,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 238 [2022-11-20 09:28:33,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:33,905 INFO L130 PetriNetUnfolder]: 79/718 cut-off events. [2022-11-20 09:28:33,905 INFO L131 PetriNetUnfolder]: For 799/811 co-relation queries the response was YES. [2022-11-20 09:28:33,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1459 conditions, 718 events. 79/718 cut-off events. For 799/811 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4085 event pairs, 17 based on Foata normal form. 8/674 useless extension candidates. Maximal degree in co-relation 1383. Up to 72 conditions per place. [2022-11-20 09:28:33,917 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 12 selfloop transitions, 8 changer transitions 0/196 dead transitions. [2022-11-20 09:28:33,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 196 transitions, 603 flow [2022-11-20 09:28:33,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:28:33,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-20 09:28:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 998 transitions. [2022-11-20 09:28:33,920 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.838655462184874 [2022-11-20 09:28:33,921 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 998 transitions. [2022-11-20 09:28:33,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 998 transitions. [2022-11-20 09:28:33,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:33,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 998 transitions. [2022-11-20 09:28:33,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 199.6) internal successors, (998), 5 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,928 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 238.0) internal successors, (1428), 6 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,929 INFO L175 Difference]: Start difference. First operand has 220 places, 193 transitions, 553 flow. Second operand 5 states and 998 transitions. [2022-11-20 09:28:33,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 196 transitions, 603 flow [2022-11-20 09:28:33,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 196 transitions, 589 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:33,937 INFO L231 Difference]: Finished difference. Result has 219 places, 193 transitions, 559 flow [2022-11-20 09:28:33,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=219, PETRI_TRANSITIONS=193} [2022-11-20 09:28:33,943 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 30 predicate places. [2022-11-20 09:28:33,943 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 193 transitions, 559 flow [2022-11-20 09:28:33,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:33,944 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:33,945 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:33,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 09:28:33,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting counter_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:33,946 INFO L85 PathProgramCache]: Analyzing trace with hash 773344814, now seen corresponding path program 1 times [2022-11-20 09:28:33,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:33,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892696091] [2022-11-20 09:28:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:33,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:34,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:34,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892696091] [2022-11-20 09:28:34,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892696091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:34,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140868905] [2022-11-20 09:28:34,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:34,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:34,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:34,161 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:34,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:28:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:34,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:34,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:34,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140868905] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:34,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:28:34,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 09:28:34,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607589142] [2022-11-20 09:28:34,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:34,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:34,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:34,417 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 238 [2022-11-20 09:28:34,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 193 transitions, 559 flow. Second operand has 6 states, 6 states have (on average 198.16666666666666) internal successors, (1189), 6 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:34,419 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:34,419 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 238 [2022-11-20 09:28:34,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:34,700 INFO L130 PetriNetUnfolder]: 76/709 cut-off events. [2022-11-20 09:28:34,700 INFO L131 PetriNetUnfolder]: For 861/873 co-relation queries the response was YES. [2022-11-20 09:28:34,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1492 conditions, 709 events. 76/709 cut-off events. For 861/873 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3987 event pairs, 9 based on Foata normal form. 8/665 useless extension candidates. Maximal degree in co-relation 1417. Up to 52 conditions per place. [2022-11-20 09:28:34,711 INFO L137 encePairwiseOnDemand]: 233/238 looper letters, 18 selfloop transitions, 7 changer transitions 0/201 dead transitions. [2022-11-20 09:28:34,712 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 201 transitions, 639 flow [2022-11-20 09:28:34,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:28:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1398 transitions. [2022-11-20 09:28:34,716 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8391356542617047 [2022-11-20 09:28:34,716 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1398 transitions. [2022-11-20 09:28:34,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1398 transitions. [2022-11-20 09:28:34,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:34,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1398 transitions. [2022-11-20 09:28:34,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 199.71428571428572) internal successors, (1398), 7 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:34,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:34,738 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:34,738 INFO L175 Difference]: Start difference. First operand has 219 places, 193 transitions, 559 flow. Second operand 7 states and 1398 transitions. [2022-11-20 09:28:34,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 201 transitions, 639 flow [2022-11-20 09:28:34,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 201 transitions, 626 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-20 09:28:34,746 INFO L231 Difference]: Finished difference. Result has 221 places, 193 transitions, 563 flow [2022-11-20 09:28:34,747 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=221, PETRI_TRANSITIONS=193} [2022-11-20 09:28:34,748 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 32 predicate places. [2022-11-20 09:28:34,748 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 193 transitions, 563 flow [2022-11-20 09:28:34,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.16666666666666) internal successors, (1189), 6 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:34,749 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:34,749 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:34,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:34,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:34,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:34,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1727538537, now seen corresponding path program 1 times [2022-11-20 09:28:34,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:34,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835771219] [2022-11-20 09:28:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:34,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:35,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835771219] [2022-11-20 09:28:35,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835771219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:35,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255511832] [2022-11-20 09:28:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:35,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:35,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:35,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:35,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:28:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:35,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:35,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:35,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:35,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255511832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:35,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:35,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-20 09:28:35,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822488891] [2022-11-20 09:28:35,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:35,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:28:35,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:35,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:28:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:28:35,531 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 238 [2022-11-20 09:28:35,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 193 transitions, 563 flow. Second operand has 12 states, 12 states have (on average 200.91666666666666) internal successors, (2411), 12 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:35,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:35,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 238 [2022-11-20 09:28:35,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:36,233 INFO L130 PetriNetUnfolder]: 216/1670 cut-off events. [2022-11-20 09:28:36,234 INFO L131 PetriNetUnfolder]: For 3074/3500 co-relation queries the response was YES. [2022-11-20 09:28:36,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 1670 events. 216/1670 cut-off events. For 3074/3500 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 14593 event pairs, 35 based on Foata normal form. 20/1444 useless extension candidates. Maximal degree in co-relation 2714. Up to 150 conditions per place. [2022-11-20 09:28:36,257 INFO L137 encePairwiseOnDemand]: 231/238 looper letters, 31 selfloop transitions, 18 changer transitions 0/228 dead transitions. [2022-11-20 09:28:36,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 228 transitions, 769 flow [2022-11-20 09:28:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 09:28:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-20 09:28:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3634 transitions. [2022-11-20 09:28:36,269 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8482726423902894 [2022-11-20 09:28:36,270 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3634 transitions. [2022-11-20 09:28:36,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3634 transitions. [2022-11-20 09:28:36,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:36,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3634 transitions. [2022-11-20 09:28:36,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 201.88888888888889) internal successors, (3634), 18 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:36,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:36,293 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 238.0) internal successors, (4522), 19 states have internal predecessors, (4522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:36,294 INFO L175 Difference]: Start difference. First operand has 221 places, 193 transitions, 563 flow. Second operand 18 states and 3634 transitions. [2022-11-20 09:28:36,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 228 transitions, 769 flow [2022-11-20 09:28:36,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 228 transitions, 758 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-20 09:28:36,304 INFO L231 Difference]: Finished difference. Result has 238 places, 205 transitions, 658 flow [2022-11-20 09:28:36,306 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=658, PETRI_PLACES=238, PETRI_TRANSITIONS=205} [2022-11-20 09:28:36,307 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 49 predicate places. [2022-11-20 09:28:36,307 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 205 transitions, 658 flow [2022-11-20 09:28:36,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 200.91666666666666) internal successors, (2411), 12 states have internal predecessors, (2411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:36,308 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:36,309 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:36,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:36,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 09:28:36,517 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:36,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2014087761, now seen corresponding path program 1 times [2022-11-20 09:28:36,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:36,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047277171] [2022-11-20 09:28:36,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:36,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:36,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:36,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:36,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047277171] [2022-11-20 09:28:36,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047277171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:36,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485404332] [2022-11-20 09:28:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:36,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:36,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:36,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:36,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:28:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:37,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:37,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:37,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485404332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:37,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:28:37,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-20 09:28:37,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291513660] [2022-11-20 09:28:37,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:37,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 09:28:37,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:37,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 09:28:37,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 09:28:37,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 238 [2022-11-20 09:28:37,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 205 transitions, 658 flow. Second operand has 6 states, 6 states have (on average 200.83333333333334) internal successors, (1205), 6 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:37,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:37,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 238 [2022-11-20 09:28:37,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:37,676 INFO L130 PetriNetUnfolder]: 191/1510 cut-off events. [2022-11-20 09:28:37,676 INFO L131 PetriNetUnfolder]: For 3201/3627 co-relation queries the response was YES. [2022-11-20 09:28:37,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2702 conditions, 1510 events. 191/1510 cut-off events. For 3201/3627 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12767 event pairs, 20 based on Foata normal form. 26/1303 useless extension candidates. Maximal degree in co-relation 2623. Up to 182 conditions per place. [2022-11-20 09:28:37,697 INFO L137 encePairwiseOnDemand]: 233/238 looper letters, 18 selfloop transitions, 11 changer transitions 0/208 dead transitions. [2022-11-20 09:28:37,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 208 transitions, 710 flow [2022-11-20 09:28:37,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:28:37,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-20 09:28:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1414 transitions. [2022-11-20 09:28:37,702 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8487394957983193 [2022-11-20 09:28:37,702 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1414 transitions. [2022-11-20 09:28:37,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1414 transitions. [2022-11-20 09:28:37,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:37,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1414 transitions. [2022-11-20 09:28:37,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.0) internal successors, (1414), 7 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) [2022-11-20 09:28:37,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:37,710 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:37,711 INFO L175 Difference]: Start difference. First operand has 238 places, 205 transitions, 658 flow. Second operand 7 states and 1414 transitions. [2022-11-20 09:28:37,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 208 transitions, 710 flow [2022-11-20 09:28:37,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 208 transitions, 678 flow, removed 11 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:37,722 INFO L231 Difference]: Finished difference. Result has 234 places, 201 transitions, 621 flow [2022-11-20 09:28:37,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=621, PETRI_PLACES=234, PETRI_TRANSITIONS=201} [2022-11-20 09:28:37,723 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 45 predicate places. [2022-11-20 09:28:37,723 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 201 transitions, 621 flow [2022-11-20 09:28:37,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 200.83333333333334) internal successors, (1205), 6 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:37,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:37,724 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 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] [2022-11-20 09:28:37,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:37,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 09:28:37,932 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:37,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:37,932 INFO L85 PathProgramCache]: Analyzing trace with hash -880620838, now seen corresponding path program 2 times [2022-11-20 09:28:37,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:37,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943027370] [2022-11-20 09:28:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:37,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:38,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:38,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943027370] [2022-11-20 09:28:38,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943027370] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:38,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630117716] [2022-11-20 09:28:38,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:38,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:38,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:38,325 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:38,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:28:38,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:38,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:38,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 09:28:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:38,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:38,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630117716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:38,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:38,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-20 09:28:38,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064126855] [2022-11-20 09:28:38,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:38,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:28:38,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:38,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:28:38,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:28:38,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 238 [2022-11-20 09:28:38,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 201 transitions, 621 flow. Second operand has 24 states, 24 states have (on average 197.25) internal successors, (4734), 24 states have internal predecessors, (4734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:38,969 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:38,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 238 [2022-11-20 09:28:38,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:42,771 INFO L130 PetriNetUnfolder]: 2106/10136 cut-off events. [2022-11-20 09:28:42,771 INFO L131 PetriNetUnfolder]: For 53594/58214 co-relation queries the response was YES. [2022-11-20 09:28:42,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19501 conditions, 10136 events. 2106/10136 cut-off events. For 53594/58214 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 111290 event pairs, 66 based on Foata normal form. 395/9029 useless extension candidates. Maximal degree in co-relation 19422. Up to 1145 conditions per place. [2022-11-20 09:28:42,954 INFO L137 encePairwiseOnDemand]: 231/238 looper letters, 131 selfloop transitions, 32 changer transitions 0/339 dead transitions. [2022-11-20 09:28:42,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 339 transitions, 1417 flow [2022-11-20 09:28:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 09:28:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 09:28:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6427 transitions. [2022-11-20 09:28:42,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8438813025210085 [2022-11-20 09:28:42,969 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6427 transitions. [2022-11-20 09:28:42,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6427 transitions. [2022-11-20 09:28:42,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:42,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6427 transitions. [2022-11-20 09:28:42,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 200.84375) internal successors, (6427), 32 states have internal predecessors, (6427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:43,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 238.0) internal successors, (7854), 33 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:43,008 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 238.0) internal successors, (7854), 33 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:43,009 INFO L175 Difference]: Start difference. First operand has 234 places, 201 transitions, 621 flow. Second operand 32 states and 6427 transitions. [2022-11-20 09:28:43,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 339 transitions, 1417 flow [2022-11-20 09:28:43,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 339 transitions, 1403 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-20 09:28:43,037 INFO L231 Difference]: Finished difference. Result has 279 places, 220 transitions, 883 flow [2022-11-20 09:28:43,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=883, PETRI_PLACES=279, PETRI_TRANSITIONS=220} [2022-11-20 09:28:43,040 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 90 predicate places. [2022-11-20 09:28:43,040 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 220 transitions, 883 flow [2022-11-20 09:28:43,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 197.25) internal successors, (4734), 24 states have internal predecessors, (4734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:43,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:43,043 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:43,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:43,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:43,251 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:43,252 INFO L85 PathProgramCache]: Analyzing trace with hash -122138814, now seen corresponding path program 2 times [2022-11-20 09:28:43,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:43,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574255098] [2022-11-20 09:28:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:43,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:43,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:43,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574255098] [2022-11-20 09:28:43,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574255098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:43,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190851193] [2022-11-20 09:28:43,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:28:43,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:43,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:43,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:28:43,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:28:43,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 09:28:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:44,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:44,464 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:44,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190851193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:44,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:44,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-20 09:28:44,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847784263] [2022-11-20 09:28:44,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:44,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 09:28:44,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 09:28:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-20 09:28:44,474 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 238 [2022-11-20 09:28:44,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 220 transitions, 883 flow. Second operand has 24 states, 24 states have (on average 201.20833333333334) internal successors, (4829), 24 states have internal predecessors, (4829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:44,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:44,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 238 [2022-11-20 09:28:44,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:28:48,114 INFO L130 PetriNetUnfolder]: 826/6218 cut-off events. [2022-11-20 09:28:48,115 INFO L131 PetriNetUnfolder]: For 78956/88047 co-relation queries the response was YES. [2022-11-20 09:28:48,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11465 conditions, 6218 events. 826/6218 cut-off events. For 78956/88047 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 71309 event pairs, 77 based on Foata normal form. 79/5252 useless extension candidates. Maximal degree in co-relation 11367. Up to 616 conditions per place. [2022-11-20 09:28:48,227 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 57 selfloop transitions, 32 changer transitions 0/287 dead transitions. [2022-11-20 09:28:48,228 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 287 transitions, 1303 flow [2022-11-20 09:28:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 09:28:48,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-20 09:28:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 6463 transitions. [2022-11-20 09:28:48,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.848608193277311 [2022-11-20 09:28:48,239 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 6463 transitions. [2022-11-20 09:28:48,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 6463 transitions. [2022-11-20 09:28:48,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:28:48,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 6463 transitions. [2022-11-20 09:28:48,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 201.96875) internal successors, (6463), 32 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 238.0) internal successors, (7854), 33 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,273 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 238.0) internal successors, (7854), 33 states have internal predecessors, (7854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,273 INFO L175 Difference]: Start difference. First operand has 279 places, 220 transitions, 883 flow. Second operand 32 states and 6463 transitions. [2022-11-20 09:28:48,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 287 transitions, 1303 flow [2022-11-20 09:28:48,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 287 transitions, 1241 flow, removed 20 selfloop flow, removed 11 redundant places. [2022-11-20 09:28:48,517 INFO L231 Difference]: Finished difference. Result has 306 places, 239 transitions, 1013 flow [2022-11-20 09:28:48,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1013, PETRI_PLACES=306, PETRI_TRANSITIONS=239} [2022-11-20 09:28:48,520 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 117 predicate places. [2022-11-20 09:28:48,520 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 239 transitions, 1013 flow [2022-11-20 09:28:48,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 201.20833333333334) internal successors, (4829), 24 states have internal predecessors, (4829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:48,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:28:48,523 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 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] [2022-11-20 09:28:48,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:48,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 09:28:48,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:28:48,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:48,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1413791718, now seen corresponding path program 3 times [2022-11-20 09:28:48,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:48,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641478199] [2022-11-20 09:28:48,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:48,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641478199] [2022-11-20 09:28:50,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641478199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:28:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862430653] [2022-11-20 09:28:50,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:28:50,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:50,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:50,080 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:50,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:28:50,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 09:28:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:50,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:28:50,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:50,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:28:51,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862430653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:51,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:28:51,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-11-20 09:28:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414208182] [2022-11-20 09:28:51,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:51,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 09:28:51,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:51,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 09:28:51,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 09:28:51,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 238 [2022-11-20 09:28:51,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 239 transitions, 1013 flow. Second operand has 48 states, 48 states have (on average 197.375) internal successors, (9474), 48 states have internal predecessors, (9474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:28:51,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:28:51,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 238 [2022-11-20 09:28:51,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:29:10,306 INFO L130 PetriNetUnfolder]: 6375/37868 cut-off events. [2022-11-20 09:29:10,306 INFO L131 PetriNetUnfolder]: For 778284/802498 co-relation queries the response was YES. [2022-11-20 09:29:10,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75665 conditions, 37868 events. 6375/37868 cut-off events. For 778284/802498 co-relation queries the response was YES. Maximal size of possible extension queue 1212. Compared 526245 event pairs, 76 based on Foata normal form. 958/34233 useless extension candidates. Maximal degree in co-relation 75560. Up to 2728 conditions per place. [2022-11-20 09:29:10,897 INFO L137 encePairwiseOnDemand]: 231/238 looper letters, 275 selfloop transitions, 68 changer transitions 0/538 dead transitions. [2022-11-20 09:29:10,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 538 transitions, 2804 flow [2022-11-20 09:29:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 09:29:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-20 09:29:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 13651 transitions. [2022-11-20 09:29:10,919 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8434873949579832 [2022-11-20 09:29:10,919 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 13651 transitions. [2022-11-20 09:29:10,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 13651 transitions. [2022-11-20 09:29:10,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:29:10,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 13651 transitions. [2022-11-20 09:29:10,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 200.75) internal successors, (13651), 68 states have internal predecessors, (13651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:10,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 238.0) internal successors, (16422), 69 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:10,975 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 238.0) internal successors, (16422), 69 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:10,976 INFO L175 Difference]: Start difference. First operand has 306 places, 239 transitions, 1013 flow. Second operand 68 states and 13651 transitions. [2022-11-20 09:29:10,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 538 transitions, 2804 flow [2022-11-20 09:29:11,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 538 transitions, 2766 flow, removed 8 selfloop flow, removed 11 redundant places. [2022-11-20 09:29:11,139 INFO L231 Difference]: Finished difference. Result has 399 places, 276 transitions, 1560 flow [2022-11-20 09:29:11,139 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=1560, PETRI_PLACES=399, PETRI_TRANSITIONS=276} [2022-11-20 09:29:11,140 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 210 predicate places. [2022-11-20 09:29:11,140 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 276 transitions, 1560 flow [2022-11-20 09:29:11,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 197.375) internal successors, (9474), 48 states have internal predecessors, (9474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:11,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:29:11,144 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 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] [2022-11-20 09:29:11,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:11,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 09:29:11,351 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:29:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1186113186, now seen corresponding path program 3 times [2022-11-20 09:29:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:11,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131691666] [2022-11-20 09:29:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:11,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:12,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131691666] [2022-11-20 09:29:12,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131691666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:12,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476191353] [2022-11-20 09:29:12,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:29:12,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:12,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:12,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:12,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:29:12,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 09:29:12,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:12,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:29:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:13,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 0 proven. 795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:14,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476191353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:14,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:14,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-11-20 09:29:14,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039725163] [2022-11-20 09:29:14,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:14,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 09:29:14,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 09:29:14,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 09:29:14,199 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 238 [2022-11-20 09:29:14,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 276 transitions, 1560 flow. Second operand has 48 states, 48 states have (on average 201.35416666666666) internal successors, (9665), 48 states have internal predecessors, (9665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:14,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:29:14,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 238 [2022-11-20 09:29:14,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-20 09:29:32,702 INFO L130 PetriNetUnfolder]: 3382/24254 cut-off events. [2022-11-20 09:29:32,702 INFO L131 PetriNetUnfolder]: For 1159484/1223133 co-relation queries the response was YES. [2022-11-20 09:29:33,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47856 conditions, 24254 events. 3382/24254 cut-off events. For 1159484/1223133 co-relation queries the response was YES. Maximal size of possible extension queue 1344. Compared 347736 event pairs, 161 based on Foata normal form. 303/20188 useless extension candidates. Maximal degree in co-relation 47713. Up to 2668 conditions per place. [2022-11-20 09:29:33,219 INFO L137 encePairwiseOnDemand]: 232/238 looper letters, 117 selfloop transitions, 68 changer transitions 0/420 dead transitions. [2022-11-20 09:29:33,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 420 transitions, 2531 flow [2022-11-20 09:29:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 09:29:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-20 09:29:33,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 13729 transitions. [2022-11-20 09:29:33,263 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8483069698467622 [2022-11-20 09:29:33,263 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 13729 transitions. [2022-11-20 09:29:33,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 13729 transitions. [2022-11-20 09:29:33,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-20 09:29:33,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 13729 transitions. [2022-11-20 09:29:33,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 201.89705882352942) internal successors, (13729), 68 states have internal predecessors, (13729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:33,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 238.0) internal successors, (16422), 69 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:33,337 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 238.0) internal successors, (16422), 69 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:33,338 INFO L175 Difference]: Start difference. First operand has 399 places, 276 transitions, 1560 flow. Second operand 68 states and 13729 transitions. [2022-11-20 09:29:33,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 420 transitions, 2531 flow [2022-11-20 09:29:34,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 420 transitions, 2397 flow, removed 38 selfloop flow, removed 29 redundant places. [2022-11-20 09:29:34,840 INFO L231 Difference]: Finished difference. Result has 450 places, 313 transitions, 1843 flow [2022-11-20 09:29:34,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=1843, PETRI_PLACES=450, PETRI_TRANSITIONS=313} [2022-11-20 09:29:34,842 INFO L288 CegarLoopForPetriNet]: 189 programPoint places, 261 predicate places. [2022-11-20 09:29:34,842 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 313 transitions, 1843 flow [2022-11-20 09:29:34,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 201.35416666666666) internal successors, (9665), 48 states have internal predecessors, (9665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:34,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-20 09:29:34,844 INFO L209 CegarLoopForPetriNet]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:34,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:35,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 09:29:35,048 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting counter_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [monitor_threadErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, monitor_threadErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (and 17 more)] === [2022-11-20 09:29:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1849083238, now seen corresponding path program 4 times [2022-11-20 09:29:35,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:35,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162548541] [2022-11-20 09:29:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:35,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 2607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:38,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162548541] [2022-11-20 09:29:38,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162548541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:29:38,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615798016] [2022-11-20 09:29:38,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:29:38,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:38,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d39c8cc-b25d-459a-8ae5-5439c6bb05c1/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:29:38,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:29:38,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:38,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 09:29:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 2607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:39,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2607 backedges. 0 proven. 2607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 09:29:42,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615798016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:42,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 09:29:42,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2022-11-20 09:29:42,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383251715] [2022-11-20 09:29:42,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:42,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-20 09:29:42,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:42,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-20 09:29:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 09:29:42,587 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 238 [2022-11-20 09:29:42,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 313 transitions, 1843 flow. Second operand has 96 states, 96 states have (on average 197.4375) internal successors, (18954), 96 states have internal predecessors, (18954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 09:29:42,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-20 09:29:42,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 238 [2022-11-20 09:29:42,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand