./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f 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_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8 --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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- 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-e04fb08 [2022-11-16 12:06:01,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:06:01,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:06:01,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:06:01,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:06:01,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:06:01,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:06:01,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:06:01,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:06:01,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:06:01,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:06:01,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:06:01,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:06:01,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:06:01,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:06:01,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:06:01,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:06:01,505 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:06:01,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:06:01,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:06:01,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:06:01,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:06:01,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:06:01,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:06:01,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:06:01,524 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:06:01,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:06:01,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:06:01,526 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:06:01,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:06:01,528 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:06:01,529 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:06:01,530 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:06:01,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:06:01,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:06:01,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:06:01,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:06:01,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:06:01,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:06:01,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:06:01,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:06:01,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:06:01,580 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:06:01,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:06:01,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:06:01,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:06:01,582 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:06:01,582 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:06:01,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:06:01,583 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:06:01,584 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:06:01,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:06:01,584 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:06:01,585 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:06:01,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:06:01,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:06:01,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:06:01,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:06:01,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:06:01,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:06:01,587 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:06:01,587 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:06:01,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:06:01,588 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:06:01,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:06:01,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:06:01,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:06:01,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:06:01,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:06:01,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:06:01,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:06:01,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:06:01,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:06:01,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:06:01,591 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:06:01,591 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:06:01,592 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:06:01,592 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_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-11-16 12:06:01,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:06:01,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:06:01,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:06:01,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:06:01,871 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:06:01,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-16 12:06:01,980 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/data/ea61f925c/a201d41b09994bc98923dec2d6318c4f/FLAGb5e358fdd [2022-11-16 12:06:02,553 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:06:02,554 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-16 12:06:02,585 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/data/ea61f925c/a201d41b09994bc98923dec2d6318c4f/FLAGb5e358fdd [2022-11-16 12:06:02,805 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/data/ea61f925c/a201d41b09994bc98923dec2d6318c4f [2022-11-16 12:06:02,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:06:02,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:06:02,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:06:02,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:06:02,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:06:02,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:06:02" (1/1) ... [2022-11-16 12:06:02,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ffe8b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:02, skipping insertion in model container [2022-11-16 12:06:02,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:06:02" (1/1) ... [2022-11-16 12:06:02,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:06:02,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:06:03,415 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-16 12:06:03,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:06:03,459 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:06:03,494 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-16 12:06:03,506 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:06:03,570 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:06:03,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03 WrapperNode [2022-11-16 12:06:03,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:06:03,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:06:03,573 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:06:03,573 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:06:03,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,649 INFO L138 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 158 [2022-11-16 12:06:03,649 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:06:03,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:06:03,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:06:03,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:06:03,660 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,705 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:06:03,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:06:03,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:06:03,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:06:03,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (1/1) ... [2022-11-16 12:06:03,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:06:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:03,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:06:03,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:06:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 12:06:03,811 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 12:06:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 12:06:03,811 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 12:06:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:06:03,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:06:03,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:06:03,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:06:03,818 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:06:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:06:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:06:03,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:06:03,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:06:03,821 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:06:04,060 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:06:04,063 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:06:04,509 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:06:04,518 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:06:04,522 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:06:04,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:06:04 BoogieIcfgContainer [2022-11-16 12:06:04,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:06:04,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:06:04,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:06:04,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:06:04,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:06:02" (1/3) ... [2022-11-16 12:06:04,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6ad738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:06:04, skipping insertion in model container [2022-11-16 12:06:04,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:06:03" (2/3) ... [2022-11-16 12:06:04,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c6ad738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:06:04, skipping insertion in model container [2022-11-16 12:06:04,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:06:04" (3/3) ... [2022-11-16 12:06:04,571 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-11-16 12:06:04,584 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:06:04,596 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:06:04,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-16 12:06:04,618 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:06:04,789 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:06:04,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 186 transitions, 388 flow [2022-11-16 12:06:04,954 INFO L130 PetriNetUnfolder]: 10/184 cut-off events. [2022-11-16 12:06:04,956 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:06:04,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 10/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 476 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-11-16 12:06:04,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 186 transitions, 388 flow [2022-11-16 12:06:04,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 174 transitions, 357 flow [2022-11-16 12:06:04,987 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:06:04,994 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;@1b666049, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:06:04,994 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-16 12:06:05,017 INFO L130 PetriNetUnfolder]: 3/80 cut-off events. [2022-11-16 12:06:05,018 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:06:05,018 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:05,019 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] [2022-11-16 12:06:05,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1946393131, now seen corresponding path program 1 times [2022-11-16 12:06:05,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:05,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159064465] [2022-11-16 12:06:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:05,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:05,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:05,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159064465] [2022-11-16 12:06:05,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159064465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:05,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:05,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:05,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919839563] [2022-11-16 12:06:05,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:05,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:05,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:05,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:05,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:05,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 186 [2022-11-16 12:06:05,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 174 transitions, 357 flow. Second operand has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:05,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:05,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 186 [2022-11-16 12:06:05,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:05,780 INFO L130 PetriNetUnfolder]: 28/332 cut-off events. [2022-11-16 12:06:05,780 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-16 12:06:05,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410 conditions, 332 events. 28/332 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1569 event pairs, 10 based on Foata normal form. 41/338 useless extension candidates. Maximal degree in co-relation 361. Up to 36 conditions per place. [2022-11-16 12:06:05,785 INFO L137 encePairwiseOnDemand]: 174/186 looper letters, 19 selfloop transitions, 4 changer transitions 0/174 dead transitions. [2022-11-16 12:06:05,785 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 174 transitions, 412 flow [2022-11-16 12:06:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:06:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 862 transitions. [2022-11-16 12:06:05,803 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9268817204301075 [2022-11-16 12:06:05,803 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 862 transitions. [2022-11-16 12:06:05,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 862 transitions. [2022-11-16 12:06:05,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:05,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 862 transitions. [2022-11-16 12:06:05,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 172.4) internal successors, (862), 5 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:05,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:05,824 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:05,826 INFO L175 Difference]: Start difference. First operand has 171 places, 174 transitions, 357 flow. Second operand 5 states and 862 transitions. [2022-11-16 12:06:05,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 174 transitions, 412 flow [2022-11-16 12:06:05,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 174 transitions, 401 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 12:06:05,836 INFO L231 Difference]: Finished difference. Result has 171 places, 168 transitions, 366 flow [2022-11-16 12:06:05,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=366, PETRI_PLACES=171, PETRI_TRANSITIONS=168} [2022-11-16 12:06:05,842 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 0 predicate places. [2022-11-16 12:06:05,842 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 168 transitions, 366 flow [2022-11-16 12:06:05,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.75) internal successors, (663), 4 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:05,843 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:05,844 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:05,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:06:05,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 2119605614, now seen corresponding path program 1 times [2022-11-16 12:06:05,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:05,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969718383] [2022-11-16 12:06:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:05,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:06,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:06,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969718383] [2022-11-16 12:06:06,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969718383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:06,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:06,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:06,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067627020] [2022-11-16 12:06:06,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:06,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:06,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:06,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:06,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:06,043 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 186 [2022-11-16 12:06:06,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 168 transitions, 366 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:06,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 186 [2022-11-16 12:06:06,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:06,406 INFO L130 PetriNetUnfolder]: 144/1253 cut-off events. [2022-11-16 12:06:06,406 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-11-16 12:06:06,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1601 conditions, 1253 events. 144/1253 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 7579 event pairs, 63 based on Foata normal form. 0/1098 useless extension candidates. Maximal degree in co-relation 1239. Up to 191 conditions per place. [2022-11-16 12:06:06,420 INFO L137 encePairwiseOnDemand]: 181/186 looper letters, 20 selfloop transitions, 3 changer transitions 0/175 dead transitions. [2022-11-16 12:06:06,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 175 transitions, 429 flow [2022-11-16 12:06:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:06:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2022-11-16 12:06:06,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9157706093189965 [2022-11-16 12:06:06,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2022-11-16 12:06:06,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2022-11-16 12:06:06,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:06,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2022-11-16 12:06:06,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,430 INFO L175 Difference]: Start difference. First operand has 171 places, 168 transitions, 366 flow. Second operand 3 states and 511 transitions. [2022-11-16 12:06:06,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 175 transitions, 429 flow [2022-11-16 12:06:06,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 175 transitions, 427 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:06:06,443 INFO L231 Difference]: Finished difference. Result has 173 places, 169 transitions, 381 flow [2022-11-16 12:06:06,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=381, PETRI_PLACES=173, PETRI_TRANSITIONS=169} [2022-11-16 12:06:06,444 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 2 predicate places. [2022-11-16 12:06:06,445 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 169 transitions, 381 flow [2022-11-16 12:06:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:06,446 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:06,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:06:06,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:06,450 INFO L85 PathProgramCache]: Analyzing trace with hash 517529129, now seen corresponding path program 1 times [2022-11-16 12:06:06,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:06,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333575153] [2022-11-16 12:06:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:06,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:06:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:06,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333575153] [2022-11-16 12:06:06,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333575153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:06,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:06,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:06,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621006925] [2022-11-16 12:06:06,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:06,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:06,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:06,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:06,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:06,586 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 186 [2022-11-16 12:06:06,588 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 169 transitions, 381 flow. Second operand has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,588 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:06,588 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 186 [2022-11-16 12:06:06,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:06,862 INFO L130 PetriNetUnfolder]: 96/788 cut-off events. [2022-11-16 12:06:06,863 INFO L131 PetriNetUnfolder]: For 115/116 co-relation queries the response was YES. [2022-11-16 12:06:06,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 788 events. 96/788 cut-off events. For 115/116 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3678 event pairs, 12 based on Foata normal form. 7/717 useless extension candidates. Maximal degree in co-relation 1027. Up to 85 conditions per place. [2022-11-16 12:06:06,872 INFO L137 encePairwiseOnDemand]: 180/186 looper letters, 12 selfloop transitions, 8 changer transitions 0/172 dead transitions. [2022-11-16 12:06:06,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 172 transitions, 428 flow [2022-11-16 12:06:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:06:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 838 transitions. [2022-11-16 12:06:06,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9010752688172043 [2022-11-16 12:06:06,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 838 transitions. [2022-11-16 12:06:06,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 838 transitions. [2022-11-16 12:06:06,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:06,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 838 transitions. [2022-11-16 12:06:06,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.6) internal successors, (838), 5 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,884 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,885 INFO L175 Difference]: Start difference. First operand has 173 places, 169 transitions, 381 flow. Second operand 5 states and 838 transitions. [2022-11-16 12:06:06,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 172 transitions, 428 flow [2022-11-16 12:06:06,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 172 transitions, 425 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:06:06,894 INFO L231 Difference]: Finished difference. Result has 176 places, 169 transitions, 398 flow [2022-11-16 12:06:06,895 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=176, PETRI_TRANSITIONS=169} [2022-11-16 12:06:06,898 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 5 predicate places. [2022-11-16 12:06:06,898 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 169 transitions, 398 flow [2022-11-16 12:06:06,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:06,899 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] [2022-11-16 12:06:06,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:06:06,900 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:06,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1136465645, now seen corresponding path program 1 times [2022-11-16 12:06:06,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:06,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931291583] [2022-11-16 12:06:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:06,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:07,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:07,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931291583] [2022-11-16 12:06:07,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931291583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:07,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836735046] [2022-11-16 12:06:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:07,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:07,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:07,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:07,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:06:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:07,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:06:07,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:07,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:07,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836735046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:07,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:06:07,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:06:07,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393920180] [2022-11-16 12:06:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:07,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:07,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:07,493 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 186 [2022-11-16 12:06:07,495 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 169 transitions, 398 flow. Second operand has 6 states, 6 states have (on average 166.33333333333334) internal successors, (998), 6 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) [2022-11-16 12:06:07,495 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:07,495 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 186 [2022-11-16 12:06:07,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:07,770 INFO L130 PetriNetUnfolder]: 91/776 cut-off events. [2022-11-16 12:06:07,770 INFO L131 PetriNetUnfolder]: For 172/173 co-relation queries the response was YES. [2022-11-16 12:06:07,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 776 events. 91/776 cut-off events. For 172/173 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3583 event pairs, 8 based on Foata normal form. 7/710 useless extension candidates. Maximal degree in co-relation 1059. Up to 65 conditions per place. [2022-11-16 12:06:07,778 INFO L137 encePairwiseOnDemand]: 181/186 looper letters, 17 selfloop transitions, 6 changer transitions 0/175 dead transitions. [2022-11-16 12:06:07,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 175 transitions, 459 flow [2022-11-16 12:06:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:06:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:06:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1172 transitions. [2022-11-16 12:06:07,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9001536098310292 [2022-11-16 12:06:07,782 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1172 transitions. [2022-11-16 12:06:07,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1172 transitions. [2022-11-16 12:06:07,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:07,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1172 transitions. [2022-11-16 12:06:07,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.42857142857142) internal successors, (1172), 7 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,792 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,792 INFO L175 Difference]: Start difference. First operand has 176 places, 169 transitions, 398 flow. Second operand 7 states and 1172 transitions. [2022-11-16 12:06:07,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 175 transitions, 459 flow [2022-11-16 12:06:07,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 175 transitions, 447 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 12:06:07,798 INFO L231 Difference]: Finished difference. Result has 178 places, 168 transitions, 394 flow [2022-11-16 12:06:07,799 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=178, PETRI_TRANSITIONS=168} [2022-11-16 12:06:07,799 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 7 predicate places. [2022-11-16 12:06:07,800 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 168 transitions, 394 flow [2022-11-16 12:06:07,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.33333333333334) internal successors, (998), 6 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) [2022-11-16 12:06:07,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:07,801 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] [2022-11-16 12:06:07,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:08,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:08,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:08,020 INFO L85 PathProgramCache]: Analyzing trace with hash 482681756, now seen corresponding path program 1 times [2022-11-16 12:06:08,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:08,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454134558] [2022-11-16 12:06:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:08,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:08,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:08,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454134558] [2022-11-16 12:06:08,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454134558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:08,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:08,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:08,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003619284] [2022-11-16 12:06:08,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:08,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:08,165 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 186 [2022-11-16 12:06:08,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 168 transitions, 394 flow. Second operand has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:08,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 186 [2022-11-16 12:06:08,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:08,595 INFO L130 PetriNetUnfolder]: 289/1948 cut-off events. [2022-11-16 12:06:08,596 INFO L131 PetriNetUnfolder]: For 234/245 co-relation queries the response was YES. [2022-11-16 12:06:08,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2867 conditions, 1948 events. 289/1948 cut-off events. For 234/245 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 13876 event pairs, 19 based on Foata normal form. 7/1806 useless extension candidates. Maximal degree in co-relation 2428. Up to 389 conditions per place. [2022-11-16 12:06:08,610 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 42 selfloop transitions, 8 changer transitions 0/195 dead transitions. [2022-11-16 12:06:08,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 195 transitions, 561 flow [2022-11-16 12:06:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:08,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:06:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 832 transitions. [2022-11-16 12:06:08,613 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8946236559139785 [2022-11-16 12:06:08,613 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 832 transitions. [2022-11-16 12:06:08,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 832 transitions. [2022-11-16 12:06:08,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:08,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 832 transitions. [2022-11-16 12:06:08,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.4) internal successors, (832), 5 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,620 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,620 INFO L175 Difference]: Start difference. First operand has 178 places, 168 transitions, 394 flow. Second operand 5 states and 832 transitions. [2022-11-16 12:06:08,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 195 transitions, 561 flow [2022-11-16 12:06:08,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 195 transitions, 550 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-16 12:06:08,627 INFO L231 Difference]: Finished difference. Result has 180 places, 173 transitions, 435 flow [2022-11-16 12:06:08,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=435, PETRI_PLACES=180, PETRI_TRANSITIONS=173} [2022-11-16 12:06:08,628 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 9 predicate places. [2022-11-16 12:06:08,628 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 173 transitions, 435 flow [2022-11-16 12:06:08,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.75) internal successors, (631), 4 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:08,629 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] [2022-11-16 12:06:08,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:06:08,630 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:08,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash -415870668, now seen corresponding path program 1 times [2022-11-16 12:06:08,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:08,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378674114] [2022-11-16 12:06:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:08,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:08,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:08,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378674114] [2022-11-16 12:06:08,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378674114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:08,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:08,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:08,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815114313] [2022-11-16 12:06:08,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:08,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:08,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:08,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:08,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:08,793 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 186 [2022-11-16 12:06:08,794 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 173 transitions, 435 flow. Second operand has 4 states, 4 states have (on average 165.5) internal successors, (662), 4 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,794 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:08,794 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 186 [2022-11-16 12:06:08,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:09,050 INFO L130 PetriNetUnfolder]: 64/1066 cut-off events. [2022-11-16 12:06:09,050 INFO L131 PetriNetUnfolder]: For 114/119 co-relation queries the response was YES. [2022-11-16 12:06:09,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1461 conditions, 1066 events. 64/1066 cut-off events. For 114/119 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5234 event pairs, 14 based on Foata normal form. 0/997 useless extension candidates. Maximal degree in co-relation 1146. Up to 56 conditions per place. [2022-11-16 12:06:09,062 INFO L137 encePairwiseOnDemand]: 179/186 looper letters, 19 selfloop transitions, 4 changer transitions 0/182 dead transitions. [2022-11-16 12:06:09,062 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 182 transitions, 505 flow [2022-11-16 12:06:09,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:09,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:06:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 846 transitions. [2022-11-16 12:06:09,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9096774193548387 [2022-11-16 12:06:09,065 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 846 transitions. [2022-11-16 12:06:09,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 846 transitions. [2022-11-16 12:06:09,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:09,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 846 transitions. [2022-11-16 12:06:09,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 169.2) internal successors, (846), 5 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,072 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,072 INFO L175 Difference]: Start difference. First operand has 180 places, 173 transitions, 435 flow. Second operand 5 states and 846 transitions. [2022-11-16 12:06:09,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 182 transitions, 505 flow [2022-11-16 12:06:09,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 182 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:06:09,079 INFO L231 Difference]: Finished difference. Result has 186 places, 176 transitions, 462 flow [2022-11-16 12:06:09,079 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=462, PETRI_PLACES=186, PETRI_TRANSITIONS=176} [2022-11-16 12:06:09,082 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 15 predicate places. [2022-11-16 12:06:09,083 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 176 transitions, 462 flow [2022-11-16 12:06:09,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.5) internal successors, (662), 4 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:09,089 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:09,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:06:09,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1065120974, now seen corresponding path program 1 times [2022-11-16 12:06:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:09,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319074857] [2022-11-16 12:06:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:09,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:09,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:09,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319074857] [2022-11-16 12:06:09,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319074857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:09,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:09,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:09,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068399819] [2022-11-16 12:06:09,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:09,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:09,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:09,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 186 [2022-11-16 12:06:09,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 176 transitions, 462 flow. Second operand has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:09,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 186 [2022-11-16 12:06:09,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:09,462 INFO L130 PetriNetUnfolder]: 36/868 cut-off events. [2022-11-16 12:06:09,462 INFO L131 PetriNetUnfolder]: For 64/64 co-relation queries the response was YES. [2022-11-16 12:06:09,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1153 conditions, 868 events. 36/868 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 4245 event pairs, 10 based on Foata normal form. 10/842 useless extension candidates. Maximal degree in co-relation 932. Up to 39 conditions per place. [2022-11-16 12:06:09,469 INFO L137 encePairwiseOnDemand]: 182/186 looper letters, 12 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2022-11-16 12:06:09,470 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 175 transitions, 482 flow [2022-11-16 12:06:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 12:06:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 510 transitions. [2022-11-16 12:06:09,472 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9139784946236559 [2022-11-16 12:06:09,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 510 transitions. [2022-11-16 12:06:09,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 510 transitions. [2022-11-16 12:06:09,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:09,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 510 transitions. [2022-11-16 12:06:09,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.0) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 186.0) internal successors, (744), 4 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,477 INFO L175 Difference]: Start difference. First operand has 186 places, 176 transitions, 462 flow. Second operand 3 states and 510 transitions. [2022-11-16 12:06:09,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 175 transitions, 482 flow [2022-11-16 12:06:09,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 175 transitions, 475 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-16 12:06:09,482 INFO L231 Difference]: Finished difference. Result has 186 places, 173 transitions, 444 flow [2022-11-16 12:06:09,483 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=444, PETRI_PLACES=186, PETRI_TRANSITIONS=173} [2022-11-16 12:06:09,483 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 15 predicate places. [2022-11-16 12:06:09,484 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 173 transitions, 444 flow [2022-11-16 12:06:09,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.66666666666666) internal successors, (503), 3 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,485 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:09,485 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:09,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:06:09,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1127533637, now seen corresponding path program 1 times [2022-11-16 12:06:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:09,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931270973] [2022-11-16 12:06:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:09,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:09,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:09,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931270973] [2022-11-16 12:06:09,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931270973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:09,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:09,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:06:09,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499596682] [2022-11-16 12:06:09,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:09,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:09,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:09,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:09,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:09,665 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:06:09,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 173 transitions, 444 flow. Second operand has 6 states, 6 states have (on average 152.66666666666666) internal successors, (916), 6 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:09,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:06:09,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:10,098 INFO L130 PetriNetUnfolder]: 128/1333 cut-off events. [2022-11-16 12:06:10,098 INFO L131 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2022-11-16 12:06:10,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2020 conditions, 1333 events. 128/1333 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 7944 event pairs, 38 based on Foata normal form. 4/1281 useless extension candidates. Maximal degree in co-relation 1191. Up to 123 conditions per place. [2022-11-16 12:06:10,107 INFO L137 encePairwiseOnDemand]: 175/186 looper letters, 55 selfloop transitions, 11 changer transitions 0/208 dead transitions. [2022-11-16 12:06:10,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 208 transitions, 671 flow [2022-11-16 12:06:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:06:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:06:10,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1268 transitions. [2022-11-16 12:06:10,111 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8521505376344086 [2022-11-16 12:06:10,111 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1268 transitions. [2022-11-16 12:06:10,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1268 transitions. [2022-11-16 12:06:10,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:10,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1268 transitions. [2022-11-16 12:06:10,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 158.5) internal successors, (1268), 8 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,122 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,122 INFO L175 Difference]: Start difference. First operand has 186 places, 173 transitions, 444 flow. Second operand 8 states and 1268 transitions. [2022-11-16 12:06:10,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 208 transitions, 671 flow [2022-11-16 12:06:10,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 208 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 12:06:10,128 INFO L231 Difference]: Finished difference. Result has 195 places, 179 transitions, 506 flow [2022-11-16 12:06:10,128 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=506, PETRI_PLACES=195, PETRI_TRANSITIONS=179} [2022-11-16 12:06:10,131 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 24 predicate places. [2022-11-16 12:06:10,131 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 179 transitions, 506 flow [2022-11-16 12:06:10,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 152.66666666666666) internal successors, (916), 6 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:10,132 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:10,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:06:10,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:10,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:10,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1934127344, now seen corresponding path program 1 times [2022-11-16 12:06:10,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:10,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133536952] [2022-11-16 12:06:10,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:10,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:10,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:10,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133536952] [2022-11-16 12:06:10,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133536952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:10,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:10,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:10,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336062955] [2022-11-16 12:06:10,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:10,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:10,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:10,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:10,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:10,233 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 186 [2022-11-16 12:06:10,234 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 179 transitions, 506 flow. Second operand has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:10,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 186 [2022-11-16 12:06:10,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:10,538 INFO L130 PetriNetUnfolder]: 102/1273 cut-off events. [2022-11-16 12:06:10,538 INFO L131 PetriNetUnfolder]: For 330/332 co-relation queries the response was YES. [2022-11-16 12:06:10,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1893 conditions, 1273 events. 102/1273 cut-off events. For 330/332 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 7037 event pairs, 26 based on Foata normal form. 22/1256 useless extension candidates. Maximal degree in co-relation 1547. Up to 116 conditions per place. [2022-11-16 12:06:10,548 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 28 selfloop transitions, 8 changer transitions 0/183 dead transitions. [2022-11-16 12:06:10,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 183 transitions, 586 flow [2022-11-16 12:06:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:06:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 813 transitions. [2022-11-16 12:06:10,551 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8741935483870967 [2022-11-16 12:06:10,551 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 813 transitions. [2022-11-16 12:06:10,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 813 transitions. [2022-11-16 12:06:10,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:10,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 813 transitions. [2022-11-16 12:06:10,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,557 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,557 INFO L175 Difference]: Start difference. First operand has 195 places, 179 transitions, 506 flow. Second operand 5 states and 813 transitions. [2022-11-16 12:06:10,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 183 transitions, 586 flow [2022-11-16 12:06:10,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 183 transitions, 580 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 12:06:10,563 INFO L231 Difference]: Finished difference. Result has 194 places, 176 transitions, 521 flow [2022-11-16 12:06:10,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=194, PETRI_TRANSITIONS=176} [2022-11-16 12:06:10,564 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 23 predicate places. [2022-11-16 12:06:10,564 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 176 transitions, 521 flow [2022-11-16 12:06:10,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:10,565 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:10,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:06:10,565 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:10,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1368917703, now seen corresponding path program 1 times [2022-11-16 12:06:10,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:10,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627761665] [2022-11-16 12:06:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:10,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:10,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627761665] [2022-11-16 12:06:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627761665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942741668] [2022-11-16 12:06:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:10,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:10,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:10,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:10,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:06:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:06:10,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:11,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:11,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942741668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:11,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:11,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:06:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2317014] [2022-11-16 12:06:11,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:06:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:06:11,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:06:11,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 186 [2022-11-16 12:06:11,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 176 transitions, 521 flow. Second operand has 12 states, 12 states have (on average 159.25) internal successors, (1911), 12 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:11,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:11,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 186 [2022-11-16 12:06:11,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:12,063 INFO L130 PetriNetUnfolder]: 160/2262 cut-off events. [2022-11-16 12:06:12,064 INFO L131 PetriNetUnfolder]: For 716/716 co-relation queries the response was YES. [2022-11-16 12:06:12,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3631 conditions, 2262 events. 160/2262 cut-off events. For 716/716 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 14777 event pairs, 32 based on Foata normal form. 25/2224 useless extension candidates. Maximal degree in co-relation 2897. Up to 107 conditions per place. [2022-11-16 12:06:12,080 INFO L137 encePairwiseOnDemand]: 175/186 looper letters, 78 selfloop transitions, 34 changer transitions 0/258 dead transitions. [2022-11-16 12:06:12,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 258 transitions, 1083 flow [2022-11-16 12:06:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:06:12,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 12:06:12,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3229 transitions. [2022-11-16 12:06:12,092 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8680107526881721 [2022-11-16 12:06:12,092 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3229 transitions. [2022-11-16 12:06:12,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3229 transitions. [2022-11-16 12:06:12,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:12,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3229 transitions. [2022-11-16 12:06:12,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 161.45) internal successors, (3229), 20 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 186.0) internal successors, (3906), 21 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,113 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 186.0) internal successors, (3906), 21 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,114 INFO L175 Difference]: Start difference. First operand has 194 places, 176 transitions, 521 flow. Second operand 20 states and 3229 transitions. [2022-11-16 12:06:12,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 258 transitions, 1083 flow [2022-11-16 12:06:12,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 258 transitions, 1061 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-16 12:06:12,124 INFO L231 Difference]: Finished difference. Result has 218 places, 203 transitions, 784 flow [2022-11-16 12:06:12,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=784, PETRI_PLACES=218, PETRI_TRANSITIONS=203} [2022-11-16 12:06:12,126 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 47 predicate places. [2022-11-16 12:06:12,126 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 203 transitions, 784 flow [2022-11-16 12:06:12,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 159.25) internal successors, (1911), 12 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:12,127 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:12,127 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:12,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:12,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 12:06:12,334 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:12,334 INFO L85 PathProgramCache]: Analyzing trace with hash -513223653, now seen corresponding path program 1 times [2022-11-16 12:06:12,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:12,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777658267] [2022-11-16 12:06:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:12,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:12,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:12,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777658267] [2022-11-16 12:06:12,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777658267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:12,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067644551] [2022-11-16 12:06:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:12,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:12,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:12,543 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:12,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:06:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:12,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:06:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:12,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:12,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067644551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:12,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:06:12,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:06:12,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633776219] [2022-11-16 12:06:12,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:12,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:12,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:12,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:12,891 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 186 [2022-11-16 12:06:12,892 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 203 transitions, 784 flow. Second operand has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 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) [2022-11-16 12:06:12,892 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:12,893 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 186 [2022-11-16 12:06:12,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:13,578 INFO L130 PetriNetUnfolder]: 154/2406 cut-off events. [2022-11-16 12:06:13,578 INFO L131 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2022-11-16 12:06:13,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4039 conditions, 2406 events. 154/2406 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 15218 event pairs, 31 based on Foata normal form. 36/2372 useless extension candidates. Maximal degree in co-relation 3526. Up to 231 conditions per place. [2022-11-16 12:06:13,594 INFO L137 encePairwiseOnDemand]: 176/186 looper letters, 68 selfloop transitions, 20 changer transitions 0/234 dead transitions. [2022-11-16 12:06:13,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 234 transitions, 1146 flow [2022-11-16 12:06:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:06:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:06:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1296 transitions. [2022-11-16 12:06:13,598 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8709677419354839 [2022-11-16 12:06:13,598 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1296 transitions. [2022-11-16 12:06:13,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1296 transitions. [2022-11-16 12:06:13,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:13,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1296 transitions. [2022-11-16 12:06:13,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 162.0) internal successors, (1296), 8 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,606 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,606 INFO L175 Difference]: Start difference. First operand has 218 places, 203 transitions, 784 flow. Second operand 8 states and 1296 transitions. [2022-11-16 12:06:13,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 234 transitions, 1146 flow [2022-11-16 12:06:13,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 234 transitions, 1054 flow, removed 41 selfloop flow, removed 5 redundant places. [2022-11-16 12:06:13,621 INFO L231 Difference]: Finished difference. Result has 223 places, 214 transitions, 915 flow [2022-11-16 12:06:13,621 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=915, PETRI_PLACES=223, PETRI_TRANSITIONS=214} [2022-11-16 12:06:13,622 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 52 predicate places. [2022-11-16 12:06:13,622 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 214 transitions, 915 flow [2022-11-16 12:06:13,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 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) [2022-11-16 12:06:13,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:13,623 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:13,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:13,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 12:06:13,828 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash 833432553, now seen corresponding path program 1 times [2022-11-16 12:06:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576715486] [2022-11-16 12:06:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:13,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:06:13,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:13,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576715486] [2022-11-16 12:06:13,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576715486] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:13,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:13,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903759878] [2022-11-16 12:06:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:13,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:13,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:13,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 186 [2022-11-16 12:06:13,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 214 transitions, 915 flow. Second operand has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:13,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 186 [2022-11-16 12:06:13,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:14,446 INFO L130 PetriNetUnfolder]: 92/2100 cut-off events. [2022-11-16 12:06:14,446 INFO L131 PetriNetUnfolder]: For 993/993 co-relation queries the response was YES. [2022-11-16 12:06:14,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3349 conditions, 2100 events. 92/2100 cut-off events. For 993/993 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11629 event pairs, 7 based on Foata normal form. 19/2057 useless extension candidates. Maximal degree in co-relation 2918. Up to 107 conditions per place. [2022-11-16 12:06:14,462 INFO L137 encePairwiseOnDemand]: 180/186 looper letters, 12 selfloop transitions, 8 changer transitions 0/217 dead transitions. [2022-11-16 12:06:14,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 217 transitions, 965 flow [2022-11-16 12:06:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:06:14,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:06:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 838 transitions. [2022-11-16 12:06:14,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9010752688172043 [2022-11-16 12:06:14,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 838 transitions. [2022-11-16 12:06:14,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 838 transitions. [2022-11-16 12:06:14,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:14,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 838 transitions. [2022-11-16 12:06:14,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 167.6) internal successors, (838), 5 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,480 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 186.0) internal successors, (1116), 6 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,480 INFO L175 Difference]: Start difference. First operand has 223 places, 214 transitions, 915 flow. Second operand 5 states and 838 transitions. [2022-11-16 12:06:14,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 217 transitions, 965 flow [2022-11-16 12:06:14,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 217 transitions, 945 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-16 12:06:14,492 INFO L231 Difference]: Finished difference. Result has 224 places, 214 transitions, 915 flow [2022-11-16 12:06:14,493 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=915, PETRI_PLACES=224, PETRI_TRANSITIONS=214} [2022-11-16 12:06:14,493 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 53 predicate places. [2022-11-16 12:06:14,494 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 214 transitions, 915 flow [2022-11-16 12:06:14,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,495 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:14,496 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:14,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:06:14,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:14,497 INFO L85 PathProgramCache]: Analyzing trace with hash 66605874, now seen corresponding path program 1 times [2022-11-16 12:06:14,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:14,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555916408] [2022-11-16 12:06:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:14,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:14,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:14,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555916408] [2022-11-16 12:06:14,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555916408] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:14,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473232176] [2022-11-16 12:06:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:14,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:14,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:14,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:14,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:06:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:06:14,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:15,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:15,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473232176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:15,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:06:15,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 12:06:15,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729112214] [2022-11-16 12:06:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:15,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:15,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:15,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 186 [2022-11-16 12:06:15,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 214 transitions, 915 flow. Second operand has 6 states, 6 states have (on average 166.16666666666666) internal successors, (997), 6 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:15,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 186 [2022-11-16 12:06:15,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:15,595 INFO L130 PetriNetUnfolder]: 88/2077 cut-off events. [2022-11-16 12:06:15,596 INFO L131 PetriNetUnfolder]: For 961/961 co-relation queries the response was YES. [2022-11-16 12:06:15,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3364 conditions, 2077 events. 88/2077 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 11404 event pairs, 2 based on Foata normal form. 19/2034 useless extension candidates. Maximal degree in co-relation 2963. Up to 102 conditions per place. [2022-11-16 12:06:15,618 INFO L137 encePairwiseOnDemand]: 181/186 looper letters, 17 selfloop transitions, 6 changer transitions 3/220 dead transitions. [2022-11-16 12:06:15,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 220 transitions, 981 flow [2022-11-16 12:06:15,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:06:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:06:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1172 transitions. [2022-11-16 12:06:15,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9001536098310292 [2022-11-16 12:06:15,623 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1172 transitions. [2022-11-16 12:06:15,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1172 transitions. [2022-11-16 12:06:15,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:15,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1172 transitions. [2022-11-16 12:06:15,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 167.42857142857142) internal successors, (1172), 7 states have internal predecessors, (1172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,630 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 186.0) internal successors, (1488), 8 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,630 INFO L175 Difference]: Start difference. First operand has 224 places, 214 transitions, 915 flow. Second operand 7 states and 1172 transitions. [2022-11-16 12:06:15,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 220 transitions, 981 flow [2022-11-16 12:06:15,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 220 transitions, 969 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 12:06:15,642 INFO L231 Difference]: Finished difference. Result has 226 places, 210 transitions, 905 flow [2022-11-16 12:06:15,643 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=905, PETRI_PLACES=226, PETRI_TRANSITIONS=210} [2022-11-16 12:06:15,644 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 55 predicate places. [2022-11-16 12:06:15,644 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 210 transitions, 905 flow [2022-11-16 12:06:15,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.16666666666666) internal successors, (997), 6 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:15,645 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:15,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:15,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 12:06:15,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash 420805352, now seen corresponding path program 1 times [2022-11-16 12:06:15,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:15,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494447610] [2022-11-16 12:06:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:16,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:16,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494447610] [2022-11-16 12:06:16,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494447610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:16,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452448980] [2022-11-16 12:06:16,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:16,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:16,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:16,117 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:16,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:06:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:16,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:06:16,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:16,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:16,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452448980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:16,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:16,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-16 12:06:16,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814562447] [2022-11-16 12:06:16,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:16,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:06:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:06:16,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:06:16,764 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:06:16,766 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 210 transitions, 905 flow. Second operand has 16 states, 16 states have (on average 153.625) internal successors, (2458), 16 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:16,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:16,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:06:16,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:17,740 INFO L130 PetriNetUnfolder]: 219/2731 cut-off events. [2022-11-16 12:06:17,740 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2022-11-16 12:06:17,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4792 conditions, 2731 events. 219/2731 cut-off events. For 1909/1909 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 18943 event pairs, 55 based on Foata normal form. 37/2697 useless extension candidates. Maximal degree in co-relation 4312. Up to 126 conditions per place. [2022-11-16 12:06:17,761 INFO L137 encePairwiseOnDemand]: 173/186 looper letters, 90 selfloop transitions, 62 changer transitions 1/289 dead transitions. [2022-11-16 12:06:17,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 289 transitions, 1528 flow [2022-11-16 12:06:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:06:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-16 12:06:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3722 transitions. [2022-11-16 12:06:17,770 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8337813620071685 [2022-11-16 12:06:17,771 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3722 transitions. [2022-11-16 12:06:17,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3722 transitions. [2022-11-16 12:06:17,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:17,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3722 transitions. [2022-11-16 12:06:17,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 155.08333333333334) internal successors, (3722), 24 states have internal predecessors, (3722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:17,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 186.0) internal successors, (4650), 25 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:17,836 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 186.0) internal successors, (4650), 25 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:17,836 INFO L175 Difference]: Start difference. First operand has 226 places, 210 transitions, 905 flow. Second operand 24 states and 3722 transitions. [2022-11-16 12:06:17,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 289 transitions, 1528 flow [2022-11-16 12:06:17,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 289 transitions, 1517 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-16 12:06:17,850 INFO L231 Difference]: Finished difference. Result has 244 places, 225 transitions, 1153 flow [2022-11-16 12:06:17,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1153, PETRI_PLACES=244, PETRI_TRANSITIONS=225} [2022-11-16 12:06:17,852 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 73 predicate places. [2022-11-16 12:06:17,852 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 225 transitions, 1153 flow [2022-11-16 12:06:17,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 153.625) internal successors, (2458), 16 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:17,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:17,854 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:17,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:18,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 12:06:18,060 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:18,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1961782889, now seen corresponding path program 1 times [2022-11-16 12:06:18,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:18,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348462244] [2022-11-16 12:06:18,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:18,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:18,216 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:06:18,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:18,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348462244] [2022-11-16 12:06:18,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348462244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:18,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:18,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:06:18,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643806425] [2022-11-16 12:06:18,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:18,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:18,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:18,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:18,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:18,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:06:18,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 225 transitions, 1153 flow. Second operand has 6 states, 6 states have (on average 154.33333333333334) internal successors, (926), 6 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:18,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:06:18,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:19,053 INFO L130 PetriNetUnfolder]: 216/2849 cut-off events. [2022-11-16 12:06:19,053 INFO L131 PetriNetUnfolder]: For 2487/2487 co-relation queries the response was YES. [2022-11-16 12:06:19,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5151 conditions, 2849 events. 216/2849 cut-off events. For 2487/2487 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 20217 event pairs, 45 based on Foata normal form. 24/2802 useless extension candidates. Maximal degree in co-relation 4687. Up to 297 conditions per place. [2022-11-16 12:06:19,073 INFO L137 encePairwiseOnDemand]: 175/186 looper letters, 49 selfloop transitions, 45 changer transitions 2/232 dead transitions. [2022-11-16 12:06:19,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 232 transitions, 1339 flow [2022-11-16 12:06:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:06:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:06:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1243 transitions. [2022-11-16 12:06:19,075 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8353494623655914 [2022-11-16 12:06:19,076 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1243 transitions. [2022-11-16 12:06:19,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1243 transitions. [2022-11-16 12:06:19,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:19,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1243 transitions. [2022-11-16 12:06:19,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 155.375) internal successors, (1243), 8 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,083 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 186.0) internal successors, (1674), 9 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,083 INFO L175 Difference]: Start difference. First operand has 244 places, 225 transitions, 1153 flow. Second operand 8 states and 1243 transitions. [2022-11-16 12:06:19,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 232 transitions, 1339 flow [2022-11-16 12:06:19,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 232 transitions, 1286 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-11-16 12:06:19,100 INFO L231 Difference]: Finished difference. Result has 240 places, 218 transitions, 1170 flow [2022-11-16 12:06:19,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1170, PETRI_PLACES=240, PETRI_TRANSITIONS=218} [2022-11-16 12:06:19,102 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 69 predicate places. [2022-11-16 12:06:19,102 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 218 transitions, 1170 flow [2022-11-16 12:06:19,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 154.33333333333334) internal successors, (926), 6 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:19,103 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:19,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:06:19,103 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash 2114023705, now seen corresponding path program 1 times [2022-11-16 12:06:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140600876] [2022-11-16 12:06:19,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:19,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:06:19,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:19,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140600876] [2022-11-16 12:06:19,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140600876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:19,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991432146] [2022-11-16 12:06:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:19,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:19,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:19,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:19,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:06:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 12:06:19,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 12:06:20,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 12:06:20,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991432146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:20,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:20,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-11-16 12:06:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972423675] [2022-11-16 12:06:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:20,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:06:20,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:20,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:06:20,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:06:20,671 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:06:20,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 218 transitions, 1170 flow. Second operand has 18 states, 18 states have (on average 154.22222222222223) internal successors, (2776), 18 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:20,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:20,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:06:20,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:22,348 INFO L130 PetriNetUnfolder]: 342/4679 cut-off events. [2022-11-16 12:06:22,348 INFO L131 PetriNetUnfolder]: For 5030/5030 co-relation queries the response was YES. [2022-11-16 12:06:22,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8653 conditions, 4679 events. 342/4679 cut-off events. For 5030/5030 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 36324 event pairs, 82 based on Foata normal form. 24/4582 useless extension candidates. Maximal degree in co-relation 8172. Up to 202 conditions per place. [2022-11-16 12:06:22,372 INFO L137 encePairwiseOnDemand]: 174/186 looper letters, 139 selfloop transitions, 91 changer transitions 5/371 dead transitions. [2022-11-16 12:06:22,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 371 transitions, 2648 flow [2022-11-16 12:06:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 12:06:22,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-16 12:06:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4359 transitions. [2022-11-16 12:06:22,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8369815668202765 [2022-11-16 12:06:22,379 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4359 transitions. [2022-11-16 12:06:22,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4359 transitions. [2022-11-16 12:06:22,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:22,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4359 transitions. [2022-11-16 12:06:22,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 155.67857142857142) internal successors, (4359), 28 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:22,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 186.0) internal successors, (5394), 29 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:22,469 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 186.0) internal successors, (5394), 29 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:22,469 INFO L175 Difference]: Start difference. First operand has 240 places, 218 transitions, 1170 flow. Second operand 28 states and 4359 transitions. [2022-11-16 12:06:22,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 371 transitions, 2648 flow [2022-11-16 12:06:22,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 371 transitions, 2552 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-16 12:06:22,499 INFO L231 Difference]: Finished difference. Result has 273 places, 269 transitions, 2000 flow [2022-11-16 12:06:22,499 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2000, PETRI_PLACES=273, PETRI_TRANSITIONS=269} [2022-11-16 12:06:22,500 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 102 predicate places. [2022-11-16 12:06:22,500 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 269 transitions, 2000 flow [2022-11-16 12:06:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 154.22222222222223) internal successors, (2776), 18 states have internal predecessors, (2776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:22,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:22,501 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:22,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:22,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:22,710 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash -927735743, now seen corresponding path program 1 times [2022-11-16 12:06:22,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:22,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675181770] [2022-11-16 12:06:22,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 12:06:23,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:23,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675181770] [2022-11-16 12:06:23,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675181770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138118255] [2022-11-16 12:06:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:23,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:23,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:23,323 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:23,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:06:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:23,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:06:23,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 12:06:24,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-16 12:06:24,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138118255] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:24,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:24,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-16 12:06:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980117832] [2022-11-16 12:06:24,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:24,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 12:06:24,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:24,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 12:06:24,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:06:24,761 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:06:24,764 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 269 transitions, 2000 flow. Second operand has 22 states, 22 states have (on average 154.63636363636363) internal successors, (3402), 22 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:24,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:24,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:06:24,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:27,442 INFO L130 PetriNetUnfolder]: 479/6353 cut-off events. [2022-11-16 12:06:27,442 INFO L131 PetriNetUnfolder]: For 10590/10590 co-relation queries the response was YES. [2022-11-16 12:06:27,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12332 conditions, 6353 events. 479/6353 cut-off events. For 10590/10590 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 51910 event pairs, 128 based on Foata normal form. 29/6209 useless extension candidates. Maximal degree in co-relation 11620. Up to 316 conditions per place. [2022-11-16 12:06:27,494 INFO L137 encePairwiseOnDemand]: 175/186 looper letters, 159 selfloop transitions, 178 changer transitions 2/475 dead transitions. [2022-11-16 12:06:27,495 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 475 transitions, 4293 flow [2022-11-16 12:06:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-16 12:06:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-16 12:06:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5436 transitions. [2022-11-16 12:06:27,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8350230414746543 [2022-11-16 12:06:27,505 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5436 transitions. [2022-11-16 12:06:27,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5436 transitions. [2022-11-16 12:06:27,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:27,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5436 transitions. [2022-11-16 12:06:27,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 155.31428571428572) internal successors, (5436), 35 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:27,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 186.0) internal successors, (6696), 36 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:27,534 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 186.0) internal successors, (6696), 36 states have internal predecessors, (6696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:27,534 INFO L175 Difference]: Start difference. First operand has 273 places, 269 transitions, 2000 flow. Second operand 35 states and 5436 transitions. [2022-11-16 12:06:27,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 475 transitions, 4293 flow [2022-11-16 12:06:27,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 475 transitions, 4188 flow, removed 38 selfloop flow, removed 4 redundant places. [2022-11-16 12:06:27,597 INFO L231 Difference]: Finished difference. Result has 310 places, 351 transitions, 3452 flow [2022-11-16 12:06:27,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3452, PETRI_PLACES=310, PETRI_TRANSITIONS=351} [2022-11-16 12:06:27,598 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 139 predicate places. [2022-11-16 12:06:27,598 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 351 transitions, 3452 flow [2022-11-16 12:06:27,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 154.63636363636363) internal successors, (3402), 22 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:27,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:27,600 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:27,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:27,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:27,812 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:27,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:27,813 INFO L85 PathProgramCache]: Analyzing trace with hash -30943778, now seen corresponding path program 2 times [2022-11-16 12:06:27,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:27,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419647099] [2022-11-16 12:06:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:27,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:28,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:28,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419647099] [2022-11-16 12:06:28,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419647099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:28,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993435689] [2022-11-16 12:06:28,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:28,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:28,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:28,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:28,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:06:28,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:06:28,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 12:06:28,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:29,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:30,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993435689] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:30,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:30,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-16 12:06:30,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659398649] [2022-11-16 12:06:30,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:30,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:06:30,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:06:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:06:30,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 186 [2022-11-16 12:06:30,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 351 transitions, 3452 flow. Second operand has 32 states, 32 states have (on average 159.71875) internal successors, (5111), 32 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:30,150 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:30,150 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 186 [2022-11-16 12:06:30,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:34,892 INFO L130 PetriNetUnfolder]: 564/9355 cut-off events. [2022-11-16 12:06:34,893 INFO L131 PetriNetUnfolder]: For 19447/19447 co-relation queries the response was YES. [2022-11-16 12:06:34,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18579 conditions, 9355 events. 564/9355 cut-off events. For 19447/19447 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 69445 event pairs, 180 based on Foata normal form. 55/9143 useless extension candidates. Maximal degree in co-relation 16874. Up to 622 conditions per place. [2022-11-16 12:06:34,964 INFO L137 encePairwiseOnDemand]: 177/186 looper letters, 295 selfloop transitions, 151 changer transitions 1/596 dead transitions. [2022-11-16 12:06:34,964 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 596 transitions, 6292 flow [2022-11-16 12:06:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-16 12:06:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-16 12:06:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 7599 transitions. [2022-11-16 12:06:34,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8692518874399451 [2022-11-16 12:06:34,978 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 7599 transitions. [2022-11-16 12:06:34,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 7599 transitions. [2022-11-16 12:06:34,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:34,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 7599 transitions. [2022-11-16 12:06:34,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 161.68085106382978) internal successors, (7599), 47 states have internal predecessors, (7599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:35,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 186.0) internal successors, (8928), 48 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:35,012 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 186.0) internal successors, (8928), 48 states have internal predecessors, (8928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:35,012 INFO L175 Difference]: Start difference. First operand has 310 places, 351 transitions, 3452 flow. Second operand 47 states and 7599 transitions. [2022-11-16 12:06:35,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 596 transitions, 6292 flow [2022-11-16 12:06:35,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 596 transitions, 6104 flow, removed 53 selfloop flow, removed 13 redundant places. [2022-11-16 12:06:35,133 INFO L231 Difference]: Finished difference. Result has 352 places, 416 transitions, 4753 flow [2022-11-16 12:06:35,134 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=3281, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=4753, PETRI_PLACES=352, PETRI_TRANSITIONS=416} [2022-11-16 12:06:35,134 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 181 predicate places. [2022-11-16 12:06:35,134 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 416 transitions, 4753 flow [2022-11-16 12:06:35,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 159.71875) internal successors, (5111), 32 states have internal predecessors, (5111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:35,136 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:35,137 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:35,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:35,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:06:35,344 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:35,345 INFO L85 PathProgramCache]: Analyzing trace with hash -338993339, now seen corresponding path program 2 times [2022-11-16 12:06:35,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:35,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098299692] [2022-11-16 12:06:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:35,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1167 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 12:06:36,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:36,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098299692] [2022-11-16 12:06:36,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098299692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:36,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464167456] [2022-11-16 12:06:36,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:36,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:36,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:36,624 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:36,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:06:36,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:06:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:36,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:06:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 12:06:37,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1135 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-16 12:06:38,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464167456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:38,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:38,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 33 [2022-11-16 12:06:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381223071] [2022-11-16 12:06:38,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:06:38,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:06:38,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:06:38,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:06:38,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 416 transitions, 4753 flow. Second operand has 34 states, 34 states have (on average 154.11764705882354) internal successors, (5240), 34 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:38,673 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:38,673 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:06:38,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:44,539 INFO L130 PetriNetUnfolder]: 918/12259 cut-off events. [2022-11-16 12:06:44,539 INFO L131 PetriNetUnfolder]: For 28629/28629 co-relation queries the response was YES. [2022-11-16 12:06:44,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25135 conditions, 12259 events. 918/12259 cut-off events. For 28629/28629 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 104901 event pairs, 301 based on Foata normal form. 24/11970 useless extension candidates. Maximal degree in co-relation 24228. Up to 600 conditions per place. [2022-11-16 12:06:44,640 INFO L137 encePairwiseOnDemand]: 175/186 looper letters, 322 selfloop transitions, 289 changer transitions 9/756 dead transitions. [2022-11-16 12:06:44,640 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 756 transitions, 8708 flow [2022-11-16 12:06:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-16 12:06:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-16 12:06:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 8725 transitions. [2022-11-16 12:06:44,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8376536098310292 [2022-11-16 12:06:44,663 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 8725 transitions. [2022-11-16 12:06:44,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 8725 transitions. [2022-11-16 12:06:44,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:44,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 8725 transitions. [2022-11-16 12:06:44,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 155.80357142857142) internal successors, (8725), 56 states have internal predecessors, (8725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:44,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 186.0) internal successors, (10602), 57 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:44,708 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 186.0) internal successors, (10602), 57 states have internal predecessors, (10602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:44,708 INFO L175 Difference]: Start difference. First operand has 352 places, 416 transitions, 4753 flow. Second operand 56 states and 8725 transitions. [2022-11-16 12:06:44,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 756 transitions, 8708 flow [2022-11-16 12:06:44,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 756 transitions, 8575 flow, removed 16 selfloop flow, removed 12 redundant places. [2022-11-16 12:06:44,873 INFO L231 Difference]: Finished difference. Result has 411 places, 507 transitions, 6962 flow [2022-11-16 12:06:44,875 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=4616, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=6962, PETRI_PLACES=411, PETRI_TRANSITIONS=507} [2022-11-16 12:06:44,875 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 240 predicate places. [2022-11-16 12:06:44,875 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 507 transitions, 6962 flow [2022-11-16 12:06:44,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 154.11764705882354) internal successors, (5240), 34 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:44,877 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:44,877 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:44,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:45,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:45,085 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:45,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1606588276, now seen corresponding path program 2 times [2022-11-16 12:06:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633645796] [2022-11-16 12:06:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:45,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 1118 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:06:46,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:46,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633645796] [2022-11-16 12:06:46,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633645796] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:46,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920639097] [2022-11-16 12:06:46,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:46,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:46,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:46,363 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:46,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:06:46,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:06:46,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:06:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 1118 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:06:47,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 1118 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:06:48,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920639097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:48,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:48,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-16 12:06:48,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839196107] [2022-11-16 12:06:48,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:48,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 12:06:48,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:48,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 12:06:48,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:06:48,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:06:48,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 507 transitions, 6962 flow. Second operand has 32 states, 32 states have (on average 154.4375) internal successors, (4942), 32 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:48,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:48,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:06:48,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:58,529 INFO L130 PetriNetUnfolder]: 1582/20012 cut-off events. [2022-11-16 12:06:58,529 INFO L131 PetriNetUnfolder]: For 59978/59978 co-relation queries the response was YES. [2022-11-16 12:06:58,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43314 conditions, 20012 events. 1582/20012 cut-off events. For 59978/59978 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 193114 event pairs, 493 based on Foata normal form. 27/19552 useless extension candidates. Maximal degree in co-relation 42338. Up to 1103 conditions per place. [2022-11-16 12:06:58,728 INFO L137 encePairwiseOnDemand]: 175/186 looper letters, 355 selfloop transitions, 592 changer transitions 7/1090 dead transitions. [2022-11-16 12:06:58,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1090 transitions, 16490 flow [2022-11-16 12:06:58,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 12:06:58,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-16 12:06:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 7942 transitions. [2022-11-16 12:06:58,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8372338182584862 [2022-11-16 12:06:58,742 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 7942 transitions. [2022-11-16 12:06:58,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 7942 transitions. [2022-11-16 12:06:58,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:58,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 7942 transitions. [2022-11-16 12:06:58,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 155.72549019607843) internal successors, (7942), 51 states have internal predecessors, (7942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:58,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 186.0) internal successors, (9672), 52 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:58,777 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 186.0) internal successors, (9672), 52 states have internal predecessors, (9672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:58,777 INFO L175 Difference]: Start difference. First operand has 411 places, 507 transitions, 6962 flow. Second operand 51 states and 7942 transitions. [2022-11-16 12:06:58,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1090 transitions, 16490 flow [2022-11-16 12:06:59,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1090 transitions, 16294 flow, removed 50 selfloop flow, removed 15 redundant places. [2022-11-16 12:06:59,179 INFO L231 Difference]: Finished difference. Result has 461 places, 846 transitions, 14492 flow [2022-11-16 12:06:59,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=14492, PETRI_PLACES=461, PETRI_TRANSITIONS=846} [2022-11-16 12:06:59,180 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 290 predicate places. [2022-11-16 12:06:59,180 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 846 transitions, 14492 flow [2022-11-16 12:06:59,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 154.4375) internal successors, (4942), 32 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:59,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:59,182 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:59,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-16 12:06:59,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:59,389 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:06:59,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:59,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1593677683, now seen corresponding path program 3 times [2022-11-16 12:06:59,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:59,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902635455] [2022-11-16 12:06:59,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:59,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 0 proven. 2318 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 12:07:01,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:01,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902635455] [2022-11-16 12:07:01,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902635455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:01,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586465842] [2022-11-16 12:07:01,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:07:01,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:01,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:01,106 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:01,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:07:02,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 12:07:02,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:02,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:07:02,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 0 proven. 2318 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 12:07:03,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 0 proven. 2318 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-16 12:07:04,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586465842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:04,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:04,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 43 [2022-11-16 12:07:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102961579] [2022-11-16 12:07:04,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:04,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 12:07:04,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 12:07:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:07:04,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:07:04,630 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 846 transitions, 14492 flow. Second operand has 44 states, 44 states have (on average 154.3181818181818) internal successors, (6790), 44 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:04,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:07:04,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:07:04,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:07:27,655 INFO L130 PetriNetUnfolder]: 2611/32233 cut-off events. [2022-11-16 12:07:27,655 INFO L131 PetriNetUnfolder]: For 129839/129839 co-relation queries the response was YES. [2022-11-16 12:07:27,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73392 conditions, 32233 events. 2611/32233 cut-off events. For 129839/129839 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 347929 event pairs, 867 based on Foata normal form. 109/31567 useless extension candidates. Maximal degree in co-relation 71494. Up to 1909 conditions per place. [2022-11-16 12:07:28,064 INFO L137 encePairwiseOnDemand]: 175/186 looper letters, 479 selfloop transitions, 1126 changer transitions 12/1753 dead transitions. [2022-11-16 12:07:28,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 1753 transitions, 31292 flow [2022-11-16 12:07:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-16 12:07:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2022-11-16 12:07:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 11525 transitions. [2022-11-16 12:07:28,085 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8373292647486196 [2022-11-16 12:07:28,085 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 11525 transitions. [2022-11-16 12:07:28,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 11525 transitions. [2022-11-16 12:07:28,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:07:28,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 11525 transitions. [2022-11-16 12:07:28,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 155.74324324324326) internal successors, (11525), 74 states have internal predecessors, (11525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:28,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 186.0) internal successors, (13950), 75 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:28,138 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 186.0) internal successors, (13950), 75 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:28,139 INFO L175 Difference]: Start difference. First operand has 461 places, 846 transitions, 14492 flow. Second operand 74 states and 11525 transitions. [2022-11-16 12:07:28,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 1753 transitions, 31292 flow [2022-11-16 12:07:28,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 1753 transitions, 30172 flow, removed 477 selfloop flow, removed 15 redundant places. [2022-11-16 12:07:29,019 INFO L231 Difference]: Finished difference. Result has 539 places, 1391 transitions, 27251 flow [2022-11-16 12:07:29,020 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=13499, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=829, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=644, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=27251, PETRI_PLACES=539, PETRI_TRANSITIONS=1391} [2022-11-16 12:07:29,021 INFO L288 CegarLoopForPetriNet]: 171 programPoint places, 368 predicate places. [2022-11-16 12:07:29,021 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 1391 transitions, 27251 flow [2022-11-16 12:07:29,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 154.3181818181818) internal successors, (6790), 44 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:29,022 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:07:29,022 INFO L209 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:29,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:29,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:07:29,223 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-16 12:07:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1820957817, now seen corresponding path program 4 times [2022-11-16 12:07:29,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:29,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598339984] [2022-11-16 12:07:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:29,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 0 proven. 2312 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:07:31,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598339984] [2022-11-16 12:07:31,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598339984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166817479] [2022-11-16 12:07:31,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:07:31,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:31,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:31,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:31,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc61cf85-65af-4db4-93fa-48648440badb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:07:32,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:07:32,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:07:32,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 0 proven. 2312 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:07:33,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2404 backedges. 0 proven. 2312 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-16 12:07:34,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166817479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:34,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:34,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 43 [2022-11-16 12:07:34,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259336486] [2022-11-16 12:07:34,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:34,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 12:07:34,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 12:07:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=1459, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:07:34,513 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 186 [2022-11-16 12:07:34,517 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1391 transitions, 27251 flow. Second operand has 44 states, 44 states have (on average 154.3181818181818) internal successors, (6790), 44 states have internal predecessors, (6790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:34,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:07:34,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 186 [2022-11-16 12:07:34,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand