./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/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_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/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_3bec3551-bffb-4974-85a2-23f47c109b34/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 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 --- 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 11:45:39,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:45:39,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:45:39,690 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:45:39,690 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:45:39,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:45:39,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:45:39,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:45:39,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:45:39,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:45:39,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:45:39,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:45:39,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:45:39,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:45:39,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:45:39,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:45:39,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:45:39,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:45:39,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:45:39,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:45:39,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:45:39,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:45:39,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:45:39,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:45:39,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:45:39,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:45:39,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:45:39,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:45:39,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:45:39,745 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:45:39,746 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:45:39,747 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:45:39,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:45:39,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:45:39,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:45:39,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:45:39,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:45:39,753 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:45:39,753 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:45:39,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:45:39,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:45:39,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:45:39,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:45:39,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:45:39,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:45:39,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:45:39,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:45:39,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:45:39,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:45:39,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:45:39,784 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:45:39,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:45:39,785 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:45:39,785 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:45:39,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:45:39,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:45:39,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:45:39,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:45:39,786 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:45:39,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:45:39,786 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:45:39,786 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:45:39,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:45:39,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:45:39,787 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:45:39,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:45:39,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:45:39,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:45:39,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:45:39,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:45:39,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:45:39,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:45:39,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:45:39,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:45:39,788 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:45:39,789 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:45:39,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:45:39,789 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_3bec3551-bffb-4974-85a2-23f47c109b34/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2173db9a2274c43e93688b39a8ab5256e9054c31e7330b4f58c34c545dbb4480 [2022-11-16 11:45:40,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:45:40,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:45:40,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:45:40,112 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:45:40,113 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:45:40,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-11-16 11:45:40,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/data/0abd2c171/13b68f4368034657b4faed2462ec88a8/FLAGd927ee360 [2022-11-16 11:45:40,757 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:45:40,758 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2022-11-16 11:45:40,766 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/data/0abd2c171/13b68f4368034657b4faed2462ec88a8/FLAGd927ee360 [2022-11-16 11:45:41,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/data/0abd2c171/13b68f4368034657b4faed2462ec88a8 [2022-11-16 11:45:41,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:45:41,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:45:41,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:45:41,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:45:41,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:45:41,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@768e400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41, skipping insertion in model container [2022-11-16 11:45:41,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:45:41,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:45:41,354 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_3bec3551-bffb-4974-85a2-23f47c109b34/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-11-16 11:45:41,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:45:41,368 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:45:41,398 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_3bec3551-bffb-4974-85a2-23f47c109b34/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c[2987,3000] [2022-11-16 11:45:41,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:45:41,415 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:45:41,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41 WrapperNode [2022-11-16 11:45:41,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:45:41,417 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:45:41,417 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:45:41,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:45:41,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,462 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 216 [2022-11-16 11:45:41,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:45:41,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:45:41,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:45:41,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:45:41,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,493 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:45:41,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:45:41,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:45:41,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:45:41,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (1/1) ... [2022-11-16 11:45:41,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:45:41,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:41,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:45:41,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:45:41,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:45:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:45:41,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:45:41,591 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:45:41,591 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:45:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:45:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:45:41,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:45:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 11:45:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 11:45:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:45:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:45:41,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:45:41,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:45:41,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:45:41,597 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 11:45:41,773 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:45:41,775 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:45:42,366 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:45:42,574 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:45:42,574 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:45:42,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:45:42 BoogieIcfgContainer [2022-11-16 11:45:42,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:45:42,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:45:42,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:45:42,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:45:42,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:45:41" (1/3) ... [2022-11-16 11:45:42,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcbb5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:45:42, skipping insertion in model container [2022-11-16 11:45:42,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:41" (2/3) ... [2022-11-16 11:45:42,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fcbb5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:45:42, skipping insertion in model container [2022-11-16 11:45:42,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:45:42" (3/3) ... [2022-11-16 11:45:42,601 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2022-11-16 11:45:42,610 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:45:42,621 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:45:42,622 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-16 11:45:42,622 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:45:42,687 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:45:42,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 201 transitions, 418 flow [2022-11-16 11:45:42,873 INFO L130 PetriNetUnfolder]: 13/199 cut-off events. [2022-11-16 11:45:42,874 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:45:42,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 199 events. 13/199 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 161 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 157. Up to 2 conditions per place. [2022-11-16 11:45:42,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 201 transitions, 418 flow [2022-11-16 11:45:42,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 180 transitions, 369 flow [2022-11-16 11:45:42,922 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:45:42,934 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;@78c0c996, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:45:42,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2022-11-16 11:45:42,971 INFO L130 PetriNetUnfolder]: 3/78 cut-off events. [2022-11-16 11:45:42,971 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:45:42,972 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:42,972 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] [2022-11-16 11:45:42,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:42,981 INFO L85 PathProgramCache]: Analyzing trace with hash 216078526, now seen corresponding path program 1 times [2022-11-16 11:45:42,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:42,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312252137] [2022-11-16 11:45:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:42,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:43,495 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 11:45:43,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:43,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312252137] [2022-11-16 11:45:43,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312252137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:43,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:43,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:45:43,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864350025] [2022-11-16 11:45:43,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:43,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:45:43,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:43,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:45:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:45:43,564 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 201 [2022-11-16 11:45:43,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 180 transitions, 369 flow. Second operand has 4 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 11:45:43,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:43,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 201 [2022-11-16 11:45:43,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:43,931 INFO L130 PetriNetUnfolder]: 71/456 cut-off events. [2022-11-16 11:45:43,931 INFO L131 PetriNetUnfolder]: For 42/50 co-relation queries the response was YES. [2022-11-16 11:45:43,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 456 events. 71/456 cut-off events. For 42/50 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1845 event pairs, 48 based on Foata normal form. 28/364 useless extension candidates. Maximal degree in co-relation 259. Up to 85 conditions per place. [2022-11-16 11:45:43,936 INFO L137 encePairwiseOnDemand]: 176/201 looper letters, 54 selfloop transitions, 9 changer transitions 4/196 dead transitions. [2022-11-16 11:45:43,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 196 transitions, 536 flow [2022-11-16 11:45:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:45:43,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:45:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 842 transitions. [2022-11-16 11:45:43,954 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8378109452736319 [2022-11-16 11:45:43,955 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 842 transitions. [2022-11-16 11:45:43,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 842 transitions. [2022-11-16 11:45:43,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:43,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 842 transitions. [2022-11-16 11:45:43,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 168.4) internal successors, (842), 5 states have internal predecessors, (842), 0 states have call successors, (0), 0 states 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 11:45:43,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 11:45:43,976 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states 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 11:45:43,978 INFO L175 Difference]: Start difference. First operand has 175 places, 180 transitions, 369 flow. Second operand 5 states and 842 transitions. [2022-11-16 11:45:43,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 196 transitions, 536 flow [2022-11-16 11:45:43,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 196 transitions, 526 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:45:43,988 INFO L231 Difference]: Finished difference. Result has 175 places, 171 transitions, 399 flow [2022-11-16 11:45:43,990 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=399, PETRI_PLACES=175, PETRI_TRANSITIONS=171} [2022-11-16 11:45:43,993 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 0 predicate places. [2022-11-16 11:45:43,994 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 171 transitions, 399 flow [2022-11-16 11:45:43,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 11:45:43,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:43,995 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:43,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:45:43,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:43,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:43,997 INFO L85 PathProgramCache]: Analyzing trace with hash -58870603, now seen corresponding path program 1 times [2022-11-16 11:45:43,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:43,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592041300] [2022-11-16 11:45:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:43,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:44,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592041300] [2022-11-16 11:45:44,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592041300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083553224] [2022-11-16 11:45:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:44,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:44,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:44,217 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:44,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:45:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:45:44,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:44,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:44,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083553224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:44,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:44,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:45:44,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248576718] [2022-11-16 11:45:44,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:44,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:45:44,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:44,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:45:44,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:45:44,590 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 201 [2022-11-16 11:45:44,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 171 transitions, 399 flow. Second operand has 12 states, 12 states have (on average 153.66666666666666) internal successors, (1844), 12 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states 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 11:45:44,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:44,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 201 [2022-11-16 11:45:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:45,229 INFO L130 PetriNetUnfolder]: 176/1008 cut-off events. [2022-11-16 11:45:45,229 INFO L131 PetriNetUnfolder]: For 52/72 co-relation queries the response was YES. [2022-11-16 11:45:45,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1008 events. 176/1008 cut-off events. For 52/72 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5466 event pairs, 120 based on Foata normal form. 6/734 useless extension candidates. Maximal degree in co-relation 996. Up to 78 conditions per place. [2022-11-16 11:45:45,237 INFO L137 encePairwiseOnDemand]: 186/201 looper letters, 111 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2022-11-16 11:45:45,237 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 280 transitions, 985 flow [2022-11-16 11:45:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:45:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:45:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2875 transitions. [2022-11-16 11:45:45,243 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7946379215035931 [2022-11-16 11:45:45,244 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2875 transitions. [2022-11-16 11:45:45,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2875 transitions. [2022-11-16 11:45:45,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:45,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2875 transitions. [2022-11-16 11:45:45,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 159.72222222222223) internal successors, (2875), 18 states have internal predecessors, (2875), 0 states have call successors, (0), 0 states 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 11:45:45,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 201.0) internal successors, (3819), 19 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states 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 11:45:45,262 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 201.0) internal successors, (3819), 19 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states 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 11:45:45,262 INFO L175 Difference]: Start difference. First operand has 175 places, 171 transitions, 399 flow. Second operand 18 states and 2875 transitions. [2022-11-16 11:45:45,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 280 transitions, 985 flow [2022-11-16 11:45:45,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 280 transitions, 980 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:45:45,269 INFO L231 Difference]: Finished difference. Result has 191 places, 198 transitions, 632 flow [2022-11-16 11:45:45,270 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=632, PETRI_PLACES=191, PETRI_TRANSITIONS=198} [2022-11-16 11:45:45,270 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 16 predicate places. [2022-11-16 11:45:45,271 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 198 transitions, 632 flow [2022-11-16 11:45:45,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.66666666666666) internal successors, (1844), 12 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states 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 11:45:45,272 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:45,272 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:45,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:45,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:45,478 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1824988088, now seen corresponding path program 1 times [2022-11-16 11:45:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:45,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272868491] [2022-11-16 11:45:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:45,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272868491] [2022-11-16 11:45:45,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272868491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:45,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686901556] [2022-11-16 11:45:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:45,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:45,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:45,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:45,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:45:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:45,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:45:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:45,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:45:45,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686901556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:45,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:45:45,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:45:45,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098487241] [2022-11-16 11:45:45,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:45,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:45:45,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:45,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:45:45,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:45:45,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 201 [2022-11-16 11:45:45,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 198 transitions, 632 flow. Second operand has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 11:45:45,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:45,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 201 [2022-11-16 11:45:45,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:46,228 INFO L130 PetriNetUnfolder]: 176/1000 cut-off events. [2022-11-16 11:45:46,228 INFO L131 PetriNetUnfolder]: For 146/166 co-relation queries the response was YES. [2022-11-16 11:45:46,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1549 conditions, 1000 events. 176/1000 cut-off events. For 146/166 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5407 event pairs, 120 based on Foata normal form. 8/728 useless extension candidates. Maximal degree in co-relation 1211. Up to 268 conditions per place. [2022-11-16 11:45:46,236 INFO L137 encePairwiseOnDemand]: 190/201 looper letters, 55 selfloop transitions, 27 changer transitions 0/211 dead transitions. [2022-11-16 11:45:46,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 211 transitions, 792 flow [2022-11-16 11:45:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:45:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:45:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1120 transitions. [2022-11-16 11:45:46,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7960199004975125 [2022-11-16 11:45:46,240 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1120 transitions. [2022-11-16 11:45:46,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1120 transitions. [2022-11-16 11:45:46,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:46,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1120 transitions. [2022-11-16 11:45:46,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 160.0) internal successors, (1120), 7 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states 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 11:45:46,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 11:45:46,248 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 11:45:46,248 INFO L175 Difference]: Start difference. First operand has 191 places, 198 transitions, 632 flow. Second operand 7 states and 1120 transitions. [2022-11-16 11:45:46,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 211 transitions, 792 flow [2022-11-16 11:45:46,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 211 transitions, 718 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-16 11:45:46,260 INFO L231 Difference]: Finished difference. Result has 186 places, 190 transitions, 558 flow [2022-11-16 11:45:46,260 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=558, PETRI_PLACES=186, PETRI_TRANSITIONS=190} [2022-11-16 11:45:46,263 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 11 predicate places. [2022-11-16 11:45:46,263 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 190 transitions, 558 flow [2022-11-16 11:45:46,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 11:45:46,264 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:46,264 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 11:45:46,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:46,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:46,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:46,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1335341918, now seen corresponding path program 1 times [2022-11-16 11:45:46,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:46,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824953743] [2022-11-16 11:45:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:46,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:46,693 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 11:45:46,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:46,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824953743] [2022-11-16 11:45:46,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824953743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:46,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:46,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:45:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365105475] [2022-11-16 11:45:46,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:46,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:45:46,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:46,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:45:46,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:45:46,709 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 201 [2022-11-16 11:45:46,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 190 transitions, 558 flow. Second operand has 6 states, 6 states have (on average 152.33333333333334) internal successors, (914), 6 states have internal predecessors, (914), 0 states have call successors, (0), 0 states 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 11:45:46,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:46,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 201 [2022-11-16 11:45:46,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:46,978 INFO L130 PetriNetUnfolder]: 144/880 cut-off events. [2022-11-16 11:45:46,978 INFO L131 PetriNetUnfolder]: For 138/154 co-relation queries the response was YES. [2022-11-16 11:45:46,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 880 events. 144/880 cut-off events. For 138/154 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4536 event pairs, 98 based on Foata normal form. 6/654 useless extension candidates. Maximal degree in co-relation 1024. Up to 261 conditions per place. [2022-11-16 11:45:46,984 INFO L137 encePairwiseOnDemand]: 190/201 looper letters, 57 selfloop transitions, 7 changer transitions 1/198 dead transitions. [2022-11-16 11:45:46,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 198 transitions, 708 flow [2022-11-16 11:45:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:45:46,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:45:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1094 transitions. [2022-11-16 11:45:46,988 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7775408670931059 [2022-11-16 11:45:46,988 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1094 transitions. [2022-11-16 11:45:46,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1094 transitions. [2022-11-16 11:45:46,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:46,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1094 transitions. [2022-11-16 11:45:46,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 156.28571428571428) internal successors, (1094), 7 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states 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 11:45:46,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 11:45:46,995 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 201.0) internal successors, (1608), 8 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states 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 11:45:46,996 INFO L175 Difference]: Start difference. First operand has 186 places, 190 transitions, 558 flow. Second operand 7 states and 1094 transitions. [2022-11-16 11:45:46,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 198 transitions, 708 flow [2022-11-16 11:45:46,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 198 transitions, 674 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:45:47,002 INFO L231 Difference]: Finished difference. Result has 189 places, 191 transitions, 554 flow [2022-11-16 11:45:47,003 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=554, PETRI_PLACES=189, PETRI_TRANSITIONS=191} [2022-11-16 11:45:47,004 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 14 predicate places. [2022-11-16 11:45:47,004 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 191 transitions, 554 flow [2022-11-16 11:45:47,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 152.33333333333334) internal successors, (914), 6 states have internal predecessors, (914), 0 states have call successors, (0), 0 states 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 11:45:47,005 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:47,005 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:47,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:45:47,005 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2012507262, now seen corresponding path program 2 times [2022-11-16 11:45:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:47,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44921799] [2022-11-16 11:45:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:47,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:47,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44921799] [2022-11-16 11:45:47,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44921799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:47,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893241445] [2022-11-16 11:45:47,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:45:47,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:47,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:47,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:47,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:45:47,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:45:47,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:47,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:45:47,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:45:47,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-16 11:45:47,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893241445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:47,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:47,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 11:45:47,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227270476] [2022-11-16 11:45:47,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:47,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:45:47,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:47,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:45:47,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:45:47,794 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 201 [2022-11-16 11:45:47,799 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 191 transitions, 554 flow. Second operand has 18 states, 18 states have (on average 139.61111111111111) internal successors, (2513), 18 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states 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 11:45:47,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:47,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 201 [2022-11-16 11:45:47,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:49,315 INFO L130 PetriNetUnfolder]: 147/1033 cut-off events. [2022-11-16 11:45:49,315 INFO L131 PetriNetUnfolder]: For 182/200 co-relation queries the response was YES. [2022-11-16 11:45:49,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1709 conditions, 1033 events. 147/1033 cut-off events. For 182/200 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 5267 event pairs, 91 based on Foata normal form. 4/823 useless extension candidates. Maximal degree in co-relation 1290. Up to 121 conditions per place. [2022-11-16 11:45:49,322 INFO L137 encePairwiseOnDemand]: 179/201 looper letters, 126 selfloop transitions, 64 changer transitions 5/309 dead transitions. [2022-11-16 11:45:49,322 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 309 transitions, 1316 flow [2022-11-16 11:45:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:45:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:45:49,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 6876 transitions. [2022-11-16 11:45:49,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.698141943344502 [2022-11-16 11:45:49,338 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 6876 transitions. [2022-11-16 11:45:49,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 6876 transitions. [2022-11-16 11:45:49,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:49,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 6876 transitions. [2022-11-16 11:45:49,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 140.3265306122449) internal successors, (6876), 49 states have internal predecessors, (6876), 0 states have call successors, (0), 0 states 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 11:45:49,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 201.0) internal successors, (10050), 50 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states 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 11:45:49,382 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 201.0) internal successors, (10050), 50 states have internal predecessors, (10050), 0 states have call successors, (0), 0 states 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 11:45:49,383 INFO L175 Difference]: Start difference. First operand has 189 places, 191 transitions, 554 flow. Second operand 49 states and 6876 transitions. [2022-11-16 11:45:49,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 309 transitions, 1316 flow [2022-11-16 11:45:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 309 transitions, 1294 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 11:45:49,390 INFO L231 Difference]: Finished difference. Result has 234 places, 212 transitions, 789 flow [2022-11-16 11:45:49,390 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=789, PETRI_PLACES=234, PETRI_TRANSITIONS=212} [2022-11-16 11:45:49,391 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 59 predicate places. [2022-11-16 11:45:49,391 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 212 transitions, 789 flow [2022-11-16 11:45:49,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 139.61111111111111) internal successors, (2513), 18 states have internal predecessors, (2513), 0 states have call successors, (0), 0 states 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 11:45:49,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:49,393 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:49,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:49,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1168431614, now seen corresponding path program 1 times [2022-11-16 11:45:49,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:49,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956386043] [2022-11-16 11:45:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:49,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956386043] [2022-11-16 11:45:49,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956386043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393469773] [2022-11-16 11:45:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:49,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:49,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:49,824 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:49,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:45:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:49,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:45:49,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:45:50,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:45:50,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393469773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:50,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:45:50,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-16 11:45:50,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937802182] [2022-11-16 11:45:50,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:50,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:45:50,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:50,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:45:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:45:50,079 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 201 [2022-11-16 11:45:50,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 212 transitions, 789 flow. Second operand has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 11:45:50,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:50,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 201 [2022-11-16 11:45:50,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:50,251 INFO L130 PetriNetUnfolder]: 98/862 cut-off events. [2022-11-16 11:45:50,252 INFO L131 PetriNetUnfolder]: For 205/217 co-relation queries the response was YES. [2022-11-16 11:45:50,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1301 conditions, 862 events. 98/862 cut-off events. For 205/217 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3903 event pairs, 48 based on Foata normal form. 0/742 useless extension candidates. Maximal degree in co-relation 1109. Up to 148 conditions per place. [2022-11-16 11:45:50,257 INFO L137 encePairwiseOnDemand]: 196/201 looper letters, 16 selfloop transitions, 3 changer transitions 0/210 dead transitions. [2022-11-16 11:45:50,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 210 transitions, 819 flow [2022-11-16 11:45:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:45:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-16 11:45:50,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 691 transitions. [2022-11-16 11:45:50,260 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8594527363184079 [2022-11-16 11:45:50,260 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 691 transitions. [2022-11-16 11:45:50,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 691 transitions. [2022-11-16 11:45:50,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:50,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 691 transitions. [2022-11-16 11:45:50,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states 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 11:45:50,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states 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 11:45:50,265 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states 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 11:45:50,265 INFO L175 Difference]: Start difference. First operand has 234 places, 212 transitions, 789 flow. Second operand 4 states and 691 transitions. [2022-11-16 11:45:50,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 210 transitions, 819 flow [2022-11-16 11:45:50,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 210 transitions, 720 flow, removed 15 selfloop flow, removed 17 redundant places. [2022-11-16 11:45:50,277 INFO L231 Difference]: Finished difference. Result has 217 places, 210 transitions, 688 flow [2022-11-16 11:45:50,277 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=688, PETRI_PLACES=217, PETRI_TRANSITIONS=210} [2022-11-16 11:45:50,279 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 42 predicate places. [2022-11-16 11:45:50,280 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 210 transitions, 688 flow [2022-11-16 11:45:50,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states 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 11:45:50,280 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:50,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:50,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:50,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:50,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:50,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1964424485, now seen corresponding path program 1 times [2022-11-16 11:45:50,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:50,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096312909] [2022-11-16 11:45:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:50,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:45:50,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:50,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096312909] [2022-11-16 11:45:50,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096312909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:50,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:50,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:45:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821307639] [2022-11-16 11:45:50,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:45:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:50,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:45:50,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:45:50,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 201 [2022-11-16 11:45:50,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 210 transitions, 688 flow. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 11:45:50,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:50,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 201 [2022-11-16 11:45:50,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:50,855 INFO L130 PetriNetUnfolder]: 80/850 cut-off events. [2022-11-16 11:45:50,856 INFO L131 PetriNetUnfolder]: For 126/132 co-relation queries the response was YES. [2022-11-16 11:45:50,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1224 conditions, 850 events. 80/850 cut-off events. For 126/132 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3811 event pairs, 12 based on Foata normal form. 12/754 useless extension candidates. Maximal degree in co-relation 1169. Up to 106 conditions per place. [2022-11-16 11:45:50,861 INFO L137 encePairwiseOnDemand]: 198/201 looper letters, 12 selfloop transitions, 2 changer transitions 0/213 dead transitions. [2022-11-16 11:45:50,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 213 transitions, 725 flow [2022-11-16 11:45:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:45:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:45:50,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2022-11-16 11:45:50,864 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8756218905472637 [2022-11-16 11:45:50,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2022-11-16 11:45:50,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2022-11-16 11:45:50,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:50,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2022-11-16 11:45:50,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 11:45:50,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states 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 11:45:50,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states 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 11:45:50,885 INFO L175 Difference]: Start difference. First operand has 217 places, 210 transitions, 688 flow. Second operand 3 states and 528 transitions. [2022-11-16 11:45:50,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 213 transitions, 725 flow [2022-11-16 11:45:50,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 213 transitions, 719 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:45:50,892 INFO L231 Difference]: Finished difference. Result has 217 places, 211 transitions, 694 flow [2022-11-16 11:45:50,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=694, PETRI_PLACES=217, PETRI_TRANSITIONS=211} [2022-11-16 11:45:50,893 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 42 predicate places. [2022-11-16 11:45:50,894 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 211 transitions, 694 flow [2022-11-16 11:45:50,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states 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 11:45:50,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:50,895 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:50,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:45:50,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1496803494, now seen corresponding path program 1 times [2022-11-16 11:45:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:50,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470984082] [2022-11-16 11:45:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:45:51,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:51,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470984082] [2022-11-16 11:45:51,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470984082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:51,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:51,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:45:51,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511588415] [2022-11-16 11:45:51,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:51,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:45:51,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:51,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:45:51,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:45:51,098 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 201 [2022-11-16 11:45:51,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 211 transitions, 694 flow. Second operand has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 11:45:51,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:51,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 201 [2022-11-16 11:45:51,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:51,383 INFO L130 PetriNetUnfolder]: 86/1128 cut-off events. [2022-11-16 11:45:51,384 INFO L131 PetriNetUnfolder]: For 372/396 co-relation queries the response was YES. [2022-11-16 11:45:51,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1847 conditions, 1128 events. 86/1128 cut-off events. For 372/396 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 5985 event pairs, 42 based on Foata normal form. 18/1014 useless extension candidates. Maximal degree in co-relation 1554. Up to 185 conditions per place. [2022-11-16 11:45:51,389 INFO L137 encePairwiseOnDemand]: 191/201 looper letters, 77 selfloop transitions, 21 changer transitions 10/245 dead transitions. [2022-11-16 11:45:51,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 245 transitions, 1054 flow [2022-11-16 11:45:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:45:51,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-16 11:45:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1396 transitions. [2022-11-16 11:45:51,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7716970702045329 [2022-11-16 11:45:51,395 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1396 transitions. [2022-11-16 11:45:51,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1396 transitions. [2022-11-16 11:45:51,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:51,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1396 transitions. [2022-11-16 11:45:51,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.11111111111111) internal successors, (1396), 9 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states 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 11:45:51,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states 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 11:45:51,405 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 201.0) internal successors, (2010), 10 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states 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 11:45:51,405 INFO L175 Difference]: Start difference. First operand has 217 places, 211 transitions, 694 flow. Second operand 9 states and 1396 transitions. [2022-11-16 11:45:51,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 245 transitions, 1054 flow [2022-11-16 11:45:51,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 245 transitions, 1052 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:45:51,412 INFO L231 Difference]: Finished difference. Result has 226 places, 212 transitions, 746 flow [2022-11-16 11:45:51,412 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=746, PETRI_PLACES=226, PETRI_TRANSITIONS=212} [2022-11-16 11:45:51,415 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 51 predicate places. [2022-11-16 11:45:51,416 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 212 transitions, 746 flow [2022-11-16 11:45:51,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 153.33333333333334) internal successors, (920), 6 states have internal predecessors, (920), 0 states have call successors, (0), 0 states 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 11:45:51,416 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:51,416 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, 1, 1, 1, 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 11:45:51,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:45:51,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:51,418 INFO L85 PathProgramCache]: Analyzing trace with hash 2106580815, now seen corresponding path program 1 times [2022-11-16 11:45:51,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:51,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006379931] [2022-11-16 11:45:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:51,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:51,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:45:51,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:51,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006379931] [2022-11-16 11:45:51,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006379931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:51,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:51,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:45:51,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667625980] [2022-11-16 11:45:51,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:51,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:45:51,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:51,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:45:51,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:45:51,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 201 [2022-11-16 11:45:51,667 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 212 transitions, 746 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 11:45:51,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:51,668 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 201 [2022-11-16 11:45:51,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:45:51,880 INFO L130 PetriNetUnfolder]: 74/1206 cut-off events. [2022-11-16 11:45:51,880 INFO L131 PetriNetUnfolder]: For 330/342 co-relation queries the response was YES. [2022-11-16 11:45:51,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 1206 events. 74/1206 cut-off events. For 330/342 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6664 event pairs, 18 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 1529. Up to 124 conditions per place. [2022-11-16 11:45:51,886 INFO L137 encePairwiseOnDemand]: 198/201 looper letters, 13 selfloop transitions, 2 changer transitions 1/216 dead transitions. [2022-11-16 11:45:51,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 216 transitions, 795 flow [2022-11-16 11:45:51,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:45:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-16 11:45:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-16 11:45:51,888 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8772802653399668 [2022-11-16 11:45:51,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-16 11:45:51,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-16 11:45:51,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:45:51,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-16 11:45:51,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states 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 11:45:51,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states 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 11:45:51,891 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states 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 11:45:51,891 INFO L175 Difference]: Start difference. First operand has 226 places, 212 transitions, 746 flow. Second operand 3 states and 529 transitions. [2022-11-16 11:45:51,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 216 transitions, 795 flow [2022-11-16 11:45:51,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 216 transitions, 770 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:45:51,898 INFO L231 Difference]: Finished difference. Result has 224 places, 213 transitions, 735 flow [2022-11-16 11:45:51,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=735, PETRI_PLACES=224, PETRI_TRANSITIONS=213} [2022-11-16 11:45:51,899 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 49 predicate places. [2022-11-16 11:45:51,899 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 213 transitions, 735 flow [2022-11-16 11:45:51,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states 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 11:45:51,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:45:51,900 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, 1, 1, 1, 1, 1, 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 11:45:51,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:45:51,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:45:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1450240961, now seen corresponding path program 1 times [2022-11-16 11:45:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:51,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253880276] [2022-11-16 11:45:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:53,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:45:53,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253880276] [2022-11-16 11:45:53,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253880276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697407892] [2022-11-16 11:45:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:53,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:53,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:53,041 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:53,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:45:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:53,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 11:45:53,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:54,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-16 11:45:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:45:54,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:54,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:54,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 20 [2022-11-16 11:45:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:45:56,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697407892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:56,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:56,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 12] total 44 [2022-11-16 11:45:56,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399120795] [2022-11-16 11:45:56,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:56,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:45:56,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:56,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:45:56,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:45:56,140 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 201 [2022-11-16 11:45:56,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 213 transitions, 735 flow. Second operand has 45 states, 45 states have (on average 103.06666666666666) internal successors, (4638), 45 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states 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 11:45:56,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:45:56,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 201 [2022-11-16 11:45:56,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:03,359 INFO L130 PetriNetUnfolder]: 6908/14726 cut-off events. [2022-11-16 11:46:03,359 INFO L131 PetriNetUnfolder]: For 3940/3940 co-relation queries the response was YES. [2022-11-16 11:46:03,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31601 conditions, 14726 events. 6908/14726 cut-off events. For 3940/3940 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 122373 event pairs, 702 based on Foata normal form. 0/12422 useless extension candidates. Maximal degree in co-relation 26341. Up to 2202 conditions per place. [2022-11-16 11:46:03,484 INFO L137 encePairwiseOnDemand]: 168/201 looper letters, 331 selfloop transitions, 130 changer transitions 14/553 dead transitions. [2022-11-16 11:46:03,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 553 transitions, 2714 flow [2022-11-16 11:46:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-16 11:46:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-16 11:46:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 7247 transitions. [2022-11-16 11:46:03,498 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5225322662052059 [2022-11-16 11:46:03,498 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 7247 transitions. [2022-11-16 11:46:03,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 7247 transitions. [2022-11-16 11:46:03,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:03,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 7247 transitions. [2022-11-16 11:46:03,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 105.02898550724638) internal successors, (7247), 69 states have internal predecessors, (7247), 0 states have call successors, (0), 0 states 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 11:46:03,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 201.0) internal successors, (14070), 70 states have internal predecessors, (14070), 0 states have call successors, (0), 0 states 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 11:46:03,542 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 201.0) internal successors, (14070), 70 states have internal predecessors, (14070), 0 states have call successors, (0), 0 states 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 11:46:03,543 INFO L175 Difference]: Start difference. First operand has 224 places, 213 transitions, 735 flow. Second operand 69 states and 7247 transitions. [2022-11-16 11:46:03,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 553 transitions, 2714 flow [2022-11-16 11:46:03,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 553 transitions, 2635 flow, removed 37 selfloop flow, removed 2 redundant places. [2022-11-16 11:46:03,557 INFO L231 Difference]: Finished difference. Result has 307 places, 324 transitions, 1509 flow [2022-11-16 11:46:03,558 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=1509, PETRI_PLACES=307, PETRI_TRANSITIONS=324} [2022-11-16 11:46:03,558 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 132 predicate places. [2022-11-16 11:46:03,558 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 324 transitions, 1509 flow [2022-11-16 11:46:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 103.06666666666666) internal successors, (4638), 45 states have internal predecessors, (4638), 0 states have call successors, (0), 0 states 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 11:46:03,560 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:03,561 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, 1, 1, 1, 1, 1, 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 11:46:03,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:03,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:46:03,767 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:46:03,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:03,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1450258835, now seen corresponding path program 1 times [2022-11-16 11:46:03,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:03,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811057989] [2022-11-16 11:46:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:03,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:46:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:05,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811057989] [2022-11-16 11:46:05,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811057989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:05,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988318206] [2022-11-16 11:46:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:05,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:05,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:05,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:05,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:46:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:05,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 11:46:05,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:06,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:46:06,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:46:07,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:46:07,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 11:46:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:46:07,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:08,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:08,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2022-11-16 11:46:08,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:08,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 136 [2022-11-16 11:46:08,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:08,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 112 [2022-11-16 11:46:08,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:08,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 79 [2022-11-16 11:46:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:46:09,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988318206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:09,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:09,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 18] total 55 [2022-11-16 11:46:09,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588007177] [2022-11-16 11:46:09,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:09,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 11:46:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 11:46:09,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=2599, Unknown=19, NotChecked=0, Total=3080 [2022-11-16 11:46:10,006 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 201 [2022-11-16 11:46:10,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 324 transitions, 1509 flow. Second operand has 56 states, 56 states have (on average 95.42857142857143) internal successors, (5344), 56 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states 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 11:46:10,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:10,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 201 [2022-11-16 11:46:10,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:22,465 INFO L130 PetriNetUnfolder]: 15317/32904 cut-off events. [2022-11-16 11:46:22,465 INFO L131 PetriNetUnfolder]: For 53232/53358 co-relation queries the response was YES. [2022-11-16 11:46:22,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88653 conditions, 32904 events. 15317/32904 cut-off events. For 53232/53358 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 319459 event pairs, 1332 based on Foata normal form. 78/28641 useless extension candidates. Maximal degree in co-relation 82449. Up to 5462 conditions per place. [2022-11-16 11:46:22,827 INFO L137 encePairwiseOnDemand]: 167/201 looper letters, 537 selfloop transitions, 324 changer transitions 12/968 dead transitions. [2022-11-16 11:46:22,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 968 transitions, 6372 flow [2022-11-16 11:46:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-16 11:46:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2022-11-16 11:46:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6713 transitions. [2022-11-16 11:46:22,840 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.491147205150717 [2022-11-16 11:46:22,840 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6713 transitions. [2022-11-16 11:46:22,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6713 transitions. [2022-11-16 11:46:22,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:22,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6713 transitions. [2022-11-16 11:46:22,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 98.72058823529412) internal successors, (6713), 68 states have internal predecessors, (6713), 0 states have call successors, (0), 0 states 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 11:46:22,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 201.0) internal successors, (13869), 69 states have internal predecessors, (13869), 0 states have call successors, (0), 0 states 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 11:46:22,879 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 201.0) internal successors, (13869), 69 states have internal predecessors, (13869), 0 states have call successors, (0), 0 states 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 11:46:22,879 INFO L175 Difference]: Start difference. First operand has 307 places, 324 transitions, 1509 flow. Second operand 68 states and 6713 transitions. [2022-11-16 11:46:22,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 968 transitions, 6372 flow [2022-11-16 11:46:23,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 968 transitions, 5827 flow, removed 236 selfloop flow, removed 19 redundant places. [2022-11-16 11:46:23,641 INFO L231 Difference]: Finished difference. Result has 375 places, 619 transitions, 3955 flow [2022-11-16 11:46:23,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=3955, PETRI_PLACES=375, PETRI_TRANSITIONS=619} [2022-11-16 11:46:23,643 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 200 predicate places. [2022-11-16 11:46:23,643 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 619 transitions, 3955 flow [2022-11-16 11:46:23,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 95.42857142857143) internal successors, (5344), 56 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states 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 11:46:23,645 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:23,645 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, 1, 1, 1, 1, 1, 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 11:46:23,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:23,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:46:23,851 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:46:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:23,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1710136971, now seen corresponding path program 2 times [2022-11-16 11:46:23,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:23,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934259162] [2022-11-16 11:46:23,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:23,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:46:25,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:25,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934259162] [2022-11-16 11:46:25,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934259162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:25,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094297557] [2022-11-16 11:46:25,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:46:25,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:25,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:25,015 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:25,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:46:25,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:46:25,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:46:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:46:25,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:26,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:46:26,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 11:46:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:46:26,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:46:26,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094297557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:46:26,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:46:26,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [19] total 31 [2022-11-16 11:46:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393263365] [2022-11-16 11:46:26,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:46:26,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:46:26,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:26,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:46:26,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:46:26,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 201 [2022-11-16 11:46:26,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 619 transitions, 3955 flow. Second operand has 14 states, 14 states have (on average 127.0) internal successors, (1778), 14 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states 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 11:46:26,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:26,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 201 [2022-11-16 11:46:26,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:46:36,756 INFO L130 PetriNetUnfolder]: 20067/41372 cut-off events. [2022-11-16 11:46:36,756 INFO L131 PetriNetUnfolder]: For 123870/124592 co-relation queries the response was YES. [2022-11-16 11:46:37,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137166 conditions, 41372 events. 20067/41372 cut-off events. For 123870/124592 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 408420 event pairs, 1910 based on Foata normal form. 874/38897 useless extension candidates. Maximal degree in co-relation 129281. Up to 15348 conditions per place. [2022-11-16 11:46:37,341 INFO L137 encePairwiseOnDemand]: 176/201 looper letters, 390 selfloop transitions, 217 changer transitions 5/783 dead transitions. [2022-11-16 11:46:37,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 783 transitions, 6189 flow [2022-11-16 11:46:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:46:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-16 11:46:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2746 transitions. [2022-11-16 11:46:37,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6505567401089789 [2022-11-16 11:46:37,357 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2746 transitions. [2022-11-16 11:46:37,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2746 transitions. [2022-11-16 11:46:37,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:46:37,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2746 transitions. [2022-11-16 11:46:37,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 130.76190476190476) internal successors, (2746), 21 states have internal predecessors, (2746), 0 states have call successors, (0), 0 states 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 11:46:37,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 201.0) internal successors, (4422), 22 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states 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 11:46:37,376 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 201.0) internal successors, (4422), 22 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states 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 11:46:37,377 INFO L175 Difference]: Start difference. First operand has 375 places, 619 transitions, 3955 flow. Second operand 21 states and 2746 transitions. [2022-11-16 11:46:37,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 783 transitions, 6189 flow [2022-11-16 11:46:39,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 783 transitions, 5858 flow, removed 141 selfloop flow, removed 17 redundant places. [2022-11-16 11:46:39,963 INFO L231 Difference]: Finished difference. Result has 385 places, 651 transitions, 4665 flow [2022-11-16 11:46:39,964 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=3678, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4665, PETRI_PLACES=385, PETRI_TRANSITIONS=651} [2022-11-16 11:46:39,965 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 210 predicate places. [2022-11-16 11:46:39,965 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 651 transitions, 4665 flow [2022-11-16 11:46:39,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 127.0) internal successors, (1778), 14 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states 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 11:46:39,966 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:46:39,966 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, 1, 1, 1, 1, 1, 1, 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 11:46:39,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:40,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:40,167 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:46:40,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:40,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1474639250, now seen corresponding path program 1 times [2022-11-16 11:46:40,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:46:40,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750430214] [2022-11-16 11:46:40,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:40,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:46:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:46:41,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:46:41,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750430214] [2022-11-16 11:46:41,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750430214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:46:41,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508004070] [2022-11-16 11:46:41,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:46:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:46:41,831 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:46:41,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:46:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:41,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 11:46:41,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:42,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:46:43,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:43,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:43,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:43,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:43,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:46:43,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:43,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2022-11-16 11:46:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:46:44,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:44,210 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_293 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_293) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4)))))) is different from false [2022-11-16 11:46:45,088 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:45,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-11-16 11:46:45,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:45,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 162 [2022-11-16 11:46:45,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2022-11-16 11:46:45,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 110 [2022-11-16 11:46:46,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:46:46,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508004070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:46,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:46,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 61 [2022-11-16 11:46:46,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967569604] [2022-11-16 11:46:46,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:46,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-16 11:46:46,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:46,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-16 11:46:46,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=3439, Unknown=3, NotChecked=118, Total=3782 [2022-11-16 11:46:46,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 201 [2022-11-16 11:46:46,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 651 transitions, 4665 flow. Second operand has 62 states, 62 states have (on average 91.2741935483871) internal successors, (5659), 62 states have internal predecessors, (5659), 0 states have call successors, (0), 0 states 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 11:46:46,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:46:46,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 201 [2022-11-16 11:46:46,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:47:09,341 INFO L130 PetriNetUnfolder]: 20882/44373 cut-off events. [2022-11-16 11:47:09,342 INFO L131 PetriNetUnfolder]: For 135762/136290 co-relation queries the response was YES. [2022-11-16 11:47:09,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152422 conditions, 44373 events. 20882/44373 cut-off events. For 135762/136290 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 448770 event pairs, 2896 based on Foata normal form. 850/41713 useless extension candidates. Maximal degree in co-relation 146390. Up to 9266 conditions per place. [2022-11-16 11:47:09,996 INFO L137 encePairwiseOnDemand]: 165/201 looper letters, 766 selfloop transitions, 400 changer transitions 11/1268 dead transitions. [2022-11-16 11:47:09,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1268 transitions, 10833 flow [2022-11-16 11:47:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-16 11:47:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2022-11-16 11:47:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6505 transitions. [2022-11-16 11:47:10,009 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4690316533275651 [2022-11-16 11:47:10,009 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6505 transitions. [2022-11-16 11:47:10,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6505 transitions. [2022-11-16 11:47:10,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:47:10,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6505 transitions. [2022-11-16 11:47:10,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 94.27536231884058) internal successors, (6505), 69 states have internal predecessors, (6505), 0 states have call successors, (0), 0 states 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 11:47:10,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 201.0) internal successors, (14070), 70 states have internal predecessors, (14070), 0 states have call successors, (0), 0 states 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 11:47:10,050 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 201.0) internal successors, (14070), 70 states have internal predecessors, (14070), 0 states have call successors, (0), 0 states 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 11:47:10,050 INFO L175 Difference]: Start difference. First operand has 385 places, 651 transitions, 4665 flow. Second operand 69 states and 6505 transitions. [2022-11-16 11:47:10,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1268 transitions, 10833 flow [2022-11-16 11:47:14,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1268 transitions, 10554 flow, removed 24 selfloop flow, removed 17 redundant places. [2022-11-16 11:47:14,793 INFO L231 Difference]: Finished difference. Result has 443 places, 768 transitions, 6661 flow [2022-11-16 11:47:14,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=6661, PETRI_PLACES=443, PETRI_TRANSITIONS=768} [2022-11-16 11:47:14,795 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 268 predicate places. [2022-11-16 11:47:14,795 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 768 transitions, 6661 flow [2022-11-16 11:47:14,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 91.2741935483871) internal successors, (5659), 62 states have internal predecessors, (5659), 0 states have call successors, (0), 0 states 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 11:47:14,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:47:14,797 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:14,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 11:47:15,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:15,003 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:47:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash -49061615, now seen corresponding path program 1 times [2022-11-16 11:47:15,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:15,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277000134] [2022-11-16 11:47:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:15,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:47:15,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:15,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277000134] [2022-11-16 11:47:15,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277000134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:15,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90337649] [2022-11-16 11:47:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:15,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:15,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:15,324 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:15,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:47:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:15,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:47:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:47:15,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:47:16,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90337649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:16,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:16,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 11:47:16,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457071751] [2022-11-16 11:47:16,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:16,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:47:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:47:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:47:16,032 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 201 [2022-11-16 11:47:16,034 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 768 transitions, 6661 flow. Second operand has 19 states, 19 states have (on average 140.8421052631579) internal successors, (2676), 19 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states 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 11:47:16,034 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:47:16,034 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 201 [2022-11-16 11:47:16,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:47:19,852 INFO L130 PetriNetUnfolder]: 2668/12483 cut-off events. [2022-11-16 11:47:19,852 INFO L131 PetriNetUnfolder]: For 46545/46813 co-relation queries the response was YES. [2022-11-16 11:47:19,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42076 conditions, 12483 events. 2668/12483 cut-off events. For 46545/46813 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 136644 event pairs, 149 based on Foata normal form. 455/12077 useless extension candidates. Maximal degree in co-relation 39745. Up to 1569 conditions per place. [2022-11-16 11:47:20,010 INFO L137 encePairwiseOnDemand]: 186/201 looper letters, 420 selfloop transitions, 60 changer transitions 12/836 dead transitions. [2022-11-16 11:47:20,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 836 transitions, 7618 flow [2022-11-16 11:47:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:47:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-16 11:47:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2843 transitions. [2022-11-16 11:47:20,015 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7072139303482587 [2022-11-16 11:47:20,015 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2843 transitions. [2022-11-16 11:47:20,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2843 transitions. [2022-11-16 11:47:20,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:47:20,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2843 transitions. [2022-11-16 11:47:20,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 142.15) internal successors, (2843), 20 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states 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 11:47:20,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 201.0) internal successors, (4221), 21 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states 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 11:47:20,028 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 201.0) internal successors, (4221), 21 states have internal predecessors, (4221), 0 states have call successors, (0), 0 states 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 11:47:20,029 INFO L175 Difference]: Start difference. First operand has 443 places, 768 transitions, 6661 flow. Second operand 20 states and 2843 transitions. [2022-11-16 11:47:20,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 836 transitions, 7618 flow [2022-11-16 11:47:21,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 836 transitions, 7264 flow, removed 31 selfloop flow, removed 32 redundant places. [2022-11-16 11:47:21,079 INFO L231 Difference]: Finished difference. Result has 431 places, 720 transitions, 5822 flow [2022-11-16 11:47:21,080 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5822, PETRI_PLACES=431, PETRI_TRANSITIONS=720} [2022-11-16 11:47:21,080 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 256 predicate places. [2022-11-16 11:47:21,080 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 720 transitions, 5822 flow [2022-11-16 11:47:21,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 140.8421052631579) internal successors, (2676), 19 states have internal predecessors, (2676), 0 states have call successors, (0), 0 states 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 11:47:21,081 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:47:21,081 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:21,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:21,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:21,282 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:47:21,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2080662795, now seen corresponding path program 1 times [2022-11-16 11:47:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:21,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866116899] [2022-11-16 11:47:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:47:21,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866116899] [2022-11-16 11:47:21,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866116899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533276490] [2022-11-16 11:47:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:21,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:21,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:21,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:21,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:47:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:21,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:47:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:47:21,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:47:22,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533276490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:22,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:22,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 11:47:22,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828188548] [2022-11-16 11:47:22,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:22,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:47:22,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:47:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:47:22,238 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 201 [2022-11-16 11:47:22,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 720 transitions, 5822 flow. Second operand has 19 states, 19 states have (on average 140.94736842105263) internal successors, (2678), 19 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states 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 11:47:22,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:47:22,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 201 [2022-11-16 11:47:22,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:47:25,310 INFO L130 PetriNetUnfolder]: 2195/10009 cut-off events. [2022-11-16 11:47:25,311 INFO L131 PetriNetUnfolder]: For 35570/35870 co-relation queries the response was YES. [2022-11-16 11:47:25,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32895 conditions, 10009 events. 2195/10009 cut-off events. For 35570/35870 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 103163 event pairs, 135 based on Foata normal form. 229/9518 useless extension candidates. Maximal degree in co-relation 31129. Up to 2000 conditions per place. [2022-11-16 11:47:25,421 INFO L137 encePairwiseOnDemand]: 187/201 looper letters, 298 selfloop transitions, 49 changer transitions 37/690 dead transitions. [2022-11-16 11:47:25,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 690 transitions, 6183 flow [2022-11-16 11:47:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:47:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 11:47:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1985 transitions. [2022-11-16 11:47:25,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7054015636105189 [2022-11-16 11:47:25,424 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1985 transitions. [2022-11-16 11:47:25,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1985 transitions. [2022-11-16 11:47:25,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:47:25,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1985 transitions. [2022-11-16 11:47:25,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 141.78571428571428) internal successors, (1985), 14 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states 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 11:47:25,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 201.0) internal successors, (3015), 15 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states 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 11:47:25,429 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 201.0) internal successors, (3015), 15 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states 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 11:47:25,429 INFO L175 Difference]: Start difference. First operand has 431 places, 720 transitions, 5822 flow. Second operand 14 states and 1985 transitions. [2022-11-16 11:47:25,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 690 transitions, 6183 flow [2022-11-16 11:47:26,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 690 transitions, 6092 flow, removed 23 selfloop flow, removed 13 redundant places. [2022-11-16 11:47:26,107 INFO L231 Difference]: Finished difference. Result has 432 places, 621 transitions, 4873 flow [2022-11-16 11:47:26,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=5088, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4873, PETRI_PLACES=432, PETRI_TRANSITIONS=621} [2022-11-16 11:47:26,109 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 257 predicate places. [2022-11-16 11:47:26,109 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 621 transitions, 4873 flow [2022-11-16 11:47:26,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 140.94736842105263) internal successors, (2678), 19 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states 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 11:47:26,110 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:47:26,110 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:26,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:26,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:47:26,315 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:47:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:26,316 INFO L85 PathProgramCache]: Analyzing trace with hash -934048947, now seen corresponding path program 1 times [2022-11-16 11:47:26,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:26,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173473608] [2022-11-16 11:47:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:26,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:34,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:34,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173473608] [2022-11-16 11:47:34,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173473608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:34,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859753426] [2022-11-16 11:47:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:34,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:34,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:34,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:34,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:47:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 11:47:34,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:36,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 11:47:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:47:36,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:36,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:47:36,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2022-11-16 11:47:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:47:38,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859753426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:38,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:38,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14, 14] total 64 [2022-11-16 11:47:38,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149239376] [2022-11-16 11:47:38,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:38,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-16 11:47:38,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-16 11:47:38,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=3629, Unknown=0, NotChecked=0, Total=4160 [2022-11-16 11:47:38,506 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 201 [2022-11-16 11:47:38,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 621 transitions, 4873 flow. Second operand has 65 states, 65 states have (on average 69.16923076923077) internal successors, (4496), 65 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states 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 11:47:38,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:47:38,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 201 [2022-11-16 11:47:38,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:48:08,365 INFO L130 PetriNetUnfolder]: 24164/52813 cut-off events. [2022-11-16 11:48:08,366 INFO L131 PetriNetUnfolder]: For 206843/207629 co-relation queries the response was YES. [2022-11-16 11:48:09,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189659 conditions, 52813 events. 24164/52813 cut-off events. For 206843/207629 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 558254 event pairs, 2378 based on Foata normal form. 1258/49480 useless extension candidates. Maximal degree in co-relation 184654. Up to 9042 conditions per place. [2022-11-16 11:48:09,193 INFO L137 encePairwiseOnDemand]: 151/201 looper letters, 732 selfloop transitions, 352 changer transitions 45/1222 dead transitions. [2022-11-16 11:48:09,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1222 transitions, 11976 flow [2022-11-16 11:48:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-16 11:48:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2022-11-16 11:48:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 5493 transitions. [2022-11-16 11:48:09,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.35036356678147723 [2022-11-16 11:48:09,200 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 5493 transitions. [2022-11-16 11:48:09,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 5493 transitions. [2022-11-16 11:48:09,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:48:09,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 5493 transitions. [2022-11-16 11:48:09,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 70.42307692307692) internal successors, (5493), 78 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states 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 11:48:09,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 201.0) internal successors, (15879), 79 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states 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 11:48:09,227 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 201.0) internal successors, (15879), 79 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states 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 11:48:09,227 INFO L175 Difference]: Start difference. First operand has 432 places, 621 transitions, 4873 flow. Second operand 78 states and 5493 transitions. [2022-11-16 11:48:09,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1222 transitions, 11976 flow [2022-11-16 11:48:17,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1222 transitions, 11861 flow, removed 16 selfloop flow, removed 11 redundant places. [2022-11-16 11:48:17,868 INFO L231 Difference]: Finished difference. Result has 520 places, 752 transitions, 7029 flow [2022-11-16 11:48:17,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=4615, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=7029, PETRI_PLACES=520, PETRI_TRANSITIONS=752} [2022-11-16 11:48:17,869 INFO L288 CegarLoopForPetriNet]: 175 programPoint places, 345 predicate places. [2022-11-16 11:48:17,869 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 752 transitions, 7029 flow [2022-11-16 11:48:17,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 69.16923076923077) internal successors, (4496), 65 states have internal predecessors, (4496), 0 states have call successors, (0), 0 states 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 11:48:17,870 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:48:17,870 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:17,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:18,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:48:18,071 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 27 more)] === [2022-11-16 11:48:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1482694172, now seen corresponding path program 2 times [2022-11-16 11:48:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:48:18,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635298878] [2022-11-16 11:48:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:18,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:48:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:20,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:48:20,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:48:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635298878] [2022-11-16 11:48:20,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635298878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:20,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814065984] [2022-11-16 11:48:20,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:48:20,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:48:20,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:48:20,815 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:48:20,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bec3551-bffb-4974-85a2-23f47c109b34/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:48:21,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:48:21,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:48:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:48:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:22,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:48:22,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:48:22,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-16 11:48:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:48:22,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:48:22,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814065984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:48:22,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:48:22,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [26] total 38 [2022-11-16 11:48:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965164164] [2022-11-16 11:48:22,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:48:22,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:48:22,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:48:22,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:48:22,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:48:22,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 201 [2022-11-16 11:48:22,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 752 transitions, 7029 flow. Second operand has 14 states, 14 states have (on average 127.07142857142857) internal successors, (1779), 14 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states 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 11:48:22,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:48:22,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 201 [2022-11-16 11:48:22,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand