./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.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_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/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_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/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_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/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 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- 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 11:25:55,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:25:55,684 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:25:55,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:25:55,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:25:55,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:25:55,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:25:55,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:25:55,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:25:55,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:25:55,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:25:55,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:25:55,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:25:55,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:25:55,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:25:55,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:25:55,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:25:55,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:25:55,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:25:55,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:25:55,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:25:55,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:25:55,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:25:55,740 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:25:55,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:25:55,749 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:25:55,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:25:55,751 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:25:55,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:25:55,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:25:55,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:25:55,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:25:55,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:25:55,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:25:55,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:25:55,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:25:55,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:25:55,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:25:55,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:25:55,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:25:55,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:25:55,770 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 11:25:55,805 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:25:55,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:25:55,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:25:55,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:25:55,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:25:55,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:25:55,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:25:55,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:25:55,816 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:25:55,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:25:55,817 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:25:55,818 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:25:55,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:25:55,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:25:55,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:25:55,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:25:55,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:25:55,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:25:55,819 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 11:25:55,819 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:25:55,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:25:55,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:25:55,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:25:55,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:25:55,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:25:55,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:25:55,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:25:55,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:25:55,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:25:55,823 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:25:55,823 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:25:55,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:25:55,824 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:25:55,824 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:25:55,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:25:55,824 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_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-16 11:25:56,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:25:56,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:25:56,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:25:56,186 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:25:56,187 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:25:56,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-16 11:25:56,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/data/052204c8a/e9ee7ed767d84e5683fd959b59a406af/FLAG2dcf8485c [2022-11-16 11:25:56,813 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:25:56,814 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-16 11:25:56,838 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/data/052204c8a/e9ee7ed767d84e5683fd959b59a406af/FLAG2dcf8485c [2022-11-16 11:25:57,105 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/data/052204c8a/e9ee7ed767d84e5683fd959b59a406af [2022-11-16 11:25:57,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:25:57,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:25:57,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:25:57,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:25:57,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:25:57,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226630c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57, skipping insertion in model container [2022-11-16 11:25:57,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:25:57,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:25:57,509 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_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-16 11:25:57,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:25:57,543 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:25:57,594 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_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-16 11:25:57,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:25:57,618 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:25:57,619 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57 WrapperNode [2022-11-16 11:25:57,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:25:57,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:25:57,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:25:57,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:25:57,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,702 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 132 [2022-11-16 11:25:57,702 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:25:57,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:25:57,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:25:57,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:25:57,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,748 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:25:57,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:25:57,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:25:57,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:25:57,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (1/1) ... [2022-11-16 11:25:57,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:25:57,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:25:57,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:25:57,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:25:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:25:57,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 11:25:57,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 11:25:57,862 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 11:25:57,862 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 11:25:57,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:25:57,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:25:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:25:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:25:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:25:57,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:25:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:25:57,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:25:57,867 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 11:25:58,035 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:25:58,038 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:25:58,609 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:25:58,627 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:25:58,629 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:25:58,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:25:58 BoogieIcfgContainer [2022-11-16 11:25:58,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:25:58,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:25:58,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:25:58,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:25:58,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:25:57" (1/3) ... [2022-11-16 11:25:58,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb775b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:25:58, skipping insertion in model container [2022-11-16 11:25:58,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:25:57" (2/3) ... [2022-11-16 11:25:58,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb775b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:25:58, skipping insertion in model container [2022-11-16 11:25:58,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:25:58" (3/3) ... [2022-11-16 11:25:58,653 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-16 11:25:58,663 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 11:25:58,675 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:25:58,676 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-16 11:25:58,676 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:25:58,791 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:25:58,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 249 transitions, 514 flow [2022-11-16 11:25:58,967 INFO L130 PetriNetUnfolder]: 21/247 cut-off events. [2022-11-16 11:25:58,968 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:25:58,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 247 events. 21/247 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 328 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 169. Up to 3 conditions per place. [2022-11-16 11:25:58,977 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 249 transitions, 514 flow [2022-11-16 11:25:58,984 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 201 places, 212 transitions, 433 flow [2022-11-16 11:25:58,996 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:25:59,003 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;@4b82f14b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:25:59,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-16 11:25:59,028 INFO L130 PetriNetUnfolder]: 3/71 cut-off events. [2022-11-16 11:25:59,037 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 11:25:59,037 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:59,038 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] [2022-11-16 11:25:59,040 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:25:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1203132096, now seen corresponding path program 1 times [2022-11-16 11:25:59,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:59,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888874676] [2022-11-16 11:25:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:59,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:25:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:25:59,556 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 11:25:59,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:25:59,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888874676] [2022-11-16 11:25:59,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888874676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:25:59,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:25:59,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:25:59,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805189447] [2022-11-16 11:25:59,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:25:59,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:25:59,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:25:59,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:25:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:25:59,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-16 11:25:59,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 212 transitions, 433 flow. Second operand has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 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 11:25:59,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:25:59,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-16 11:25:59,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:25:59,913 INFO L130 PetriNetUnfolder]: 19/328 cut-off events. [2022-11-16 11:25:59,914 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-16 11:25:59,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 328 events. 19/328 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 909 event pairs, 0 based on Foata normal form. 12/296 useless extension candidates. Maximal degree in co-relation 287. Up to 29 conditions per place. [2022-11-16 11:25:59,919 INFO L137 encePairwiseOnDemand]: 228/249 looper letters, 38 selfloop transitions, 9 changer transitions 4/224 dead transitions. [2022-11-16 11:25:59,920 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 224 transitions, 560 flow [2022-11-16 11:25:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:25:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:25:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1108 transitions. [2022-11-16 11:25:59,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8899598393574297 [2022-11-16 11:25:59,941 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1108 transitions. [2022-11-16 11:25:59,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1108 transitions. [2022-11-16 11:25:59,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:25:59,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1108 transitions. [2022-11-16 11:25:59,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.6) internal successors, (1108), 5 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states 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 11:25:59,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 11:25:59,968 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 11:25:59,970 INFO L175 Difference]: Start difference. First operand has 201 places, 212 transitions, 433 flow. Second operand 5 states and 1108 transitions. [2022-11-16 11:25:59,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 224 transitions, 560 flow [2022-11-16 11:25:59,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 224 transitions, 550 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-16 11:25:59,982 INFO L231 Difference]: Finished difference. Result has 205 places, 207 transitions, 471 flow [2022-11-16 11:25:59,985 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=471, PETRI_PLACES=205, PETRI_TRANSITIONS=207} [2022-11-16 11:25:59,989 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 4 predicate places. [2022-11-16 11:25:59,990 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 207 transitions, 471 flow [2022-11-16 11:25:59,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.5) internal successors, (842), 4 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 11:25:59,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:25:59,992 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] [2022-11-16 11:25:59,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:25:59,993 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:25:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:25:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1719939263, now seen corresponding path program 1 times [2022-11-16 11:25:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:25:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499936317] [2022-11-16 11:25:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:25:59,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:00,317 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 11:26:00,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:00,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499936317] [2022-11-16 11:26:00,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499936317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:00,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269670083] [2022-11-16 11:26:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:00,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:00,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:00,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:00,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:26:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:00,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:26:00,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:00,612 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 11:26:00,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:00,688 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 11:26:00,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269670083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:00,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:00,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 11:26:00,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238344434] [2022-11-16 11:26:00,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:00,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:26:00,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:00,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:26:00,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:26:00,699 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-16 11:26:00,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 207 transitions, 471 flow. Second operand has 12 states, 12 states have (on average 211.66666666666666) internal successors, (2540), 12 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states 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 11:26:00,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:00,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-16 11:26:00,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:01,298 INFO L130 PetriNetUnfolder]: 46/700 cut-off events. [2022-11-16 11:26:01,299 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-16 11:26:01,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 700 events. 46/700 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 3016 event pairs, 0 based on Foata normal form. 6/616 useless extension candidates. Maximal degree in co-relation 500. Up to 22 conditions per place. [2022-11-16 11:26:01,314 INFO L137 encePairwiseOnDemand]: 234/249 looper letters, 71 selfloop transitions, 40 changer transitions 0/284 dead transitions. [2022-11-16 11:26:01,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 284 transitions, 913 flow [2022-11-16 11:26:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:26:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:26:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3879 transitions. [2022-11-16 11:26:01,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8654618473895582 [2022-11-16 11:26:01,324 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3879 transitions. [2022-11-16 11:26:01,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3879 transitions. [2022-11-16 11:26:01,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:01,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3879 transitions. [2022-11-16 11:26:01,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 215.5) internal successors, (3879), 18 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states 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 11:26:01,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states 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 11:26:01,369 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states 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 11:26:01,370 INFO L175 Difference]: Start difference. First operand has 205 places, 207 transitions, 471 flow. Second operand 18 states and 3879 transitions. [2022-11-16 11:26:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 284 transitions, 913 flow [2022-11-16 11:26:01,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 284 transitions, 908 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:26:01,385 INFO L231 Difference]: Finished difference. Result has 221 places, 234 transitions, 704 flow [2022-11-16 11:26:01,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=704, PETRI_PLACES=221, PETRI_TRANSITIONS=234} [2022-11-16 11:26:01,387 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 20 predicate places. [2022-11-16 11:26:01,387 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 234 transitions, 704 flow [2022-11-16 11:26:01,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 211.66666666666666) internal successors, (2540), 12 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states 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 11:26:01,390 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:01,390 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] [2022-11-16 11:26:01,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:01,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 11:26:01,596 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:01,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1778509086, now seen corresponding path program 1 times [2022-11-16 11:26:01,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:01,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863133941] [2022-11-16 11:26:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:01,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:01,747 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 11:26:01,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:01,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863133941] [2022-11-16 11:26:01,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863133941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:01,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680104253] [2022-11-16 11:26:01,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:01,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:01,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:01,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:01,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:26:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:01,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:26:01,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:01,947 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 11:26:01,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:01,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680104253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:01,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:26:01,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:26:01,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663844590] [2022-11-16 11:26:01,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:01,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:26:01,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:26:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:26:01,951 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-16 11:26:01,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 234 transitions, 704 flow. Second operand has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:01,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:01,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-16 11:26:01,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:02,243 INFO L130 PetriNetUnfolder]: 46/692 cut-off events. [2022-11-16 11:26:02,243 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-11-16 11:26:02,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 921 conditions, 692 events. 46/692 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2982 event pairs, 0 based on Foata normal form. 8/610 useless extension candidates. Maximal degree in co-relation 707. Up to 44 conditions per place. [2022-11-16 11:26:02,276 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 39 selfloop transitions, 27 changer transitions 0/239 dead transitions. [2022-11-16 11:26:02,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 239 transitions, 816 flow [2022-11-16 11:26:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:26:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:26:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1510 transitions. [2022-11-16 11:26:02,282 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8663224325874929 [2022-11-16 11:26:02,282 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1510 transitions. [2022-11-16 11:26:02,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1510 transitions. [2022-11-16 11:26:02,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:02,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1510 transitions. [2022-11-16 11:26:02,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 215.71428571428572) internal successors, (1510), 7 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states 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 11:26:02,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 11:26:02,293 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 11:26:02,293 INFO L175 Difference]: Start difference. First operand has 221 places, 234 transitions, 704 flow. Second operand 7 states and 1510 transitions. [2022-11-16 11:26:02,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 239 transitions, 816 flow [2022-11-16 11:26:02,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 239 transitions, 742 flow, removed 26 selfloop flow, removed 5 redundant places. [2022-11-16 11:26:02,306 INFO L231 Difference]: Finished difference. Result has 216 places, 226 transitions, 630 flow [2022-11-16 11:26:02,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=216, PETRI_TRANSITIONS=226} [2022-11-16 11:26:02,310 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 15 predicate places. [2022-11-16 11:26:02,310 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 226 transitions, 630 flow [2022-11-16 11:26:02,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.33333333333334) internal successors, (1268), 6 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:02,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:02,311 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] [2022-11-16 11:26:02,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:02,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:02,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash -696889088, now seen corresponding path program 2 times [2022-11-16 11:26:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765244977] [2022-11-16 11:26:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:02,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:02,928 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 11:26:02,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:02,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765244977] [2022-11-16 11:26:02,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765244977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:02,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509454659] [2022-11-16 11:26:02,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:02,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:02,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:02,936 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:02,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:26:03,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:26:03,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:26:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:03,243 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 11:26:03,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:03,458 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 11:26:03,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509454659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:03,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:03,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 17 [2022-11-16 11:26:03,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988408463] [2022-11-16 11:26:03,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:03,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:26:03,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:03,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:26:03,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:26:03,476 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 249 [2022-11-16 11:26:03,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 226 transitions, 630 flow. Second operand has 18 states, 18 states have (on average 183.61111111111111) internal successors, (3305), 18 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states 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 11:26:03,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:03,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 249 [2022-11-16 11:26:03,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:05,551 INFO L130 PetriNetUnfolder]: 722/3123 cut-off events. [2022-11-16 11:26:05,551 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2022-11-16 11:26:05,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4622 conditions, 3123 events. 722/3123 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 24275 event pairs, 371 based on Foata normal form. 4/2399 useless extension candidates. Maximal degree in co-relation 3660. Up to 182 conditions per place. [2022-11-16 11:26:05,577 INFO L137 encePairwiseOnDemand]: 229/249 looper letters, 191 selfloop transitions, 65 changer transitions 0/400 dead transitions. [2022-11-16 11:26:05,577 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 400 transitions, 1573 flow [2022-11-16 11:26:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:26:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-16 11:26:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 9080 transitions. [2022-11-16 11:26:05,601 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7442012949758217 [2022-11-16 11:26:05,601 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 9080 transitions. [2022-11-16 11:26:05,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 9080 transitions. [2022-11-16 11:26:05,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:05,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 9080 transitions. [2022-11-16 11:26:05,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 185.30612244897958) internal successors, (9080), 49 states have internal predecessors, (9080), 0 states have call successors, (0), 0 states 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 11:26:05,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 249.0) internal successors, (12450), 50 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states 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 11:26:05,671 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 249.0) internal successors, (12450), 50 states have internal predecessors, (12450), 0 states have call successors, (0), 0 states 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 11:26:05,672 INFO L175 Difference]: Start difference. First operand has 216 places, 226 transitions, 630 flow. Second operand 49 states and 9080 transitions. [2022-11-16 11:26:05,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 400 transitions, 1573 flow [2022-11-16 11:26:05,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 400 transitions, 1530 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:26:05,682 INFO L231 Difference]: Finished difference. Result has 262 places, 251 transitions, 845 flow [2022-11-16 11:26:05,692 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=845, PETRI_PLACES=262, PETRI_TRANSITIONS=251} [2022-11-16 11:26:05,694 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 61 predicate places. [2022-11-16 11:26:05,694 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 251 transitions, 845 flow [2022-11-16 11:26:05,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.61111111111111) internal successors, (3305), 18 states have internal predecessors, (3305), 0 states have call successors, (0), 0 states 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 11:26:05,696 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:05,696 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:05,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:05,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:05,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2027870170, now seen corresponding path program 1 times [2022-11-16 11:26:05,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:05,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851364634] [2022-11-16 11:26:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:05,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:06,338 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 11:26:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:06,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851364634] [2022-11-16 11:26:06,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851364634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:06,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:06,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:26:06,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843188032] [2022-11-16 11:26:06,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:06,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:26:06,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:06,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:26:06,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:26:06,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 249 [2022-11-16 11:26:06,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 251 transitions, 845 flow. Second operand has 11 states, 11 states have (on average 163.1818181818182) internal successors, (1795), 11 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states 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 11:26:06,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:06,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 249 [2022-11-16 11:26:06,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:08,007 INFO L130 PetriNetUnfolder]: 1289/5611 cut-off events. [2022-11-16 11:26:08,007 INFO L131 PetriNetUnfolder]: For 615/615 co-relation queries the response was YES. [2022-11-16 11:26:08,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8251 conditions, 5611 events. 1289/5611 cut-off events. For 615/615 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 51043 event pairs, 546 based on Foata normal form. 0/4393 useless extension candidates. Maximal degree in co-relation 7076. Up to 951 conditions per place. [2022-11-16 11:26:08,050 INFO L137 encePairwiseOnDemand]: 231/249 looper letters, 136 selfloop transitions, 28 changer transitions 0/317 dead transitions. [2022-11-16 11:26:08,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 317 transitions, 1408 flow [2022-11-16 11:26:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:26:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-16 11:26:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2673 transitions. [2022-11-16 11:26:08,057 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.670933734939759 [2022-11-16 11:26:08,058 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2673 transitions. [2022-11-16 11:26:08,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2673 transitions. [2022-11-16 11:26:08,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:08,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2673 transitions. [2022-11-16 11:26:08,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 167.0625) internal successors, (2673), 16 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states 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 11:26:08,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states 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 11:26:08,076 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states 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 11:26:08,077 INFO L175 Difference]: Start difference. First operand has 262 places, 251 transitions, 845 flow. Second operand 16 states and 2673 transitions. [2022-11-16 11:26:08,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 317 transitions, 1408 flow [2022-11-16 11:26:08,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 317 transitions, 1301 flow, removed 13 selfloop flow, removed 15 redundant places. [2022-11-16 11:26:08,086 INFO L231 Difference]: Finished difference. Result has 270 places, 258 transitions, 879 flow [2022-11-16 11:26:08,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=762, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=879, PETRI_PLACES=270, PETRI_TRANSITIONS=258} [2022-11-16 11:26:08,088 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 69 predicate places. [2022-11-16 11:26:08,088 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 258 transitions, 879 flow [2022-11-16 11:26:08,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 163.1818181818182) internal successors, (1795), 11 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states 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 11:26:08,089 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:08,089 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:08,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:26:08,090 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:08,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1560533539, now seen corresponding path program 1 times [2022-11-16 11:26:08,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:08,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183570386] [2022-11-16 11:26:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:08,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:08,309 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 11:26:08,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:08,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183570386] [2022-11-16 11:26:08,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183570386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:08,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:08,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:26:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042369884] [2022-11-16 11:26:08,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:08,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:26:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:08,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:26:08,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:26:08,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 249 [2022-11-16 11:26:08,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 258 transitions, 879 flow. Second operand has 8 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states 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 11:26:08,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:08,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 249 [2022-11-16 11:26:08,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:09,937 INFO L130 PetriNetUnfolder]: 1312/5840 cut-off events. [2022-11-16 11:26:09,938 INFO L131 PetriNetUnfolder]: For 1200/1200 co-relation queries the response was YES. [2022-11-16 11:26:09,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9118 conditions, 5840 events. 1312/5840 cut-off events. For 1200/1200 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 54710 event pairs, 358 based on Foata normal form. 59/5038 useless extension candidates. Maximal degree in co-relation 7795. Up to 1158 conditions per place. [2022-11-16 11:26:09,997 INFO L137 encePairwiseOnDemand]: 235/249 looper letters, 105 selfloop transitions, 20 changer transitions 0/289 dead transitions. [2022-11-16 11:26:09,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 289 transitions, 1222 flow [2022-11-16 11:26:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:26:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:26:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2150 transitions. [2022-11-16 11:26:10,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7849580138736765 [2022-11-16 11:26:10,004 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2150 transitions. [2022-11-16 11:26:10,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2150 transitions. [2022-11-16 11:26:10,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:10,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2150 transitions. [2022-11-16 11:26:10,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.45454545454547) internal successors, (2150), 11 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states 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 11:26:10,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states 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 11:26:10,018 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states 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 11:26:10,018 INFO L175 Difference]: Start difference. First operand has 270 places, 258 transitions, 879 flow. Second operand 11 states and 2150 transitions. [2022-11-16 11:26:10,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 289 transitions, 1222 flow [2022-11-16 11:26:10,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 289 transitions, 1204 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:26:10,030 INFO L231 Difference]: Finished difference. Result has 278 places, 261 transitions, 936 flow [2022-11-16 11:26:10,030 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=936, PETRI_PLACES=278, PETRI_TRANSITIONS=261} [2022-11-16 11:26:10,031 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 77 predicate places. [2022-11-16 11:26:10,031 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 261 transitions, 936 flow [2022-11-16 11:26:10,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 191.375) internal successors, (1531), 8 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states 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 11:26:10,032 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:10,033 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] [2022-11-16 11:26:10,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:26:10,033 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:10,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:10,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1355456156, now seen corresponding path program 1 times [2022-11-16 11:26:10,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:10,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666186038] [2022-11-16 11:26:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:10,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:10,132 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 11:26:10,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:10,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666186038] [2022-11-16 11:26:10,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666186038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:10,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:10,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:26:10,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350928262] [2022-11-16 11:26:10,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:10,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:26:10,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:10,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:26:10,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:26:10,137 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-16 11:26:10,138 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 261 transitions, 936 flow. Second operand has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states 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 11:26:10,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:10,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-16 11:26:10,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:11,132 INFO L130 PetriNetUnfolder]: 588/4038 cut-off events. [2022-11-16 11:26:11,133 INFO L131 PetriNetUnfolder]: For 934/982 co-relation queries the response was YES. [2022-11-16 11:26:11,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6993 conditions, 4038 events. 588/4038 cut-off events. For 934/982 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 38712 event pairs, 202 based on Foata normal form. 14/3672 useless extension candidates. Maximal degree in co-relation 6237. Up to 655 conditions per place. [2022-11-16 11:26:11,186 INFO L137 encePairwiseOnDemand]: 243/249 looper letters, 28 selfloop transitions, 4 changer transitions 0/276 dead transitions. [2022-11-16 11:26:11,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 276 transitions, 1037 flow [2022-11-16 11:26:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:26:11,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:26:11,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1129 transitions. [2022-11-16 11:26:11,189 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9068273092369478 [2022-11-16 11:26:11,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1129 transitions. [2022-11-16 11:26:11,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1129 transitions. [2022-11-16 11:26:11,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:11,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1129 transitions. [2022-11-16 11:26:11,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.8) internal successors, (1129), 5 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states 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 11:26:11,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 11:26:11,197 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 11:26:11,198 INFO L175 Difference]: Start difference. First operand has 278 places, 261 transitions, 936 flow. Second operand 5 states and 1129 transitions. [2022-11-16 11:26:11,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 276 transitions, 1037 flow [2022-11-16 11:26:11,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 276 transitions, 1008 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 11:26:11,215 INFO L231 Difference]: Finished difference. Result has 278 places, 264 transitions, 937 flow [2022-11-16 11:26:11,216 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=937, PETRI_PLACES=278, PETRI_TRANSITIONS=264} [2022-11-16 11:26:11,217 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 77 predicate places. [2022-11-16 11:26:11,217 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 264 transitions, 937 flow [2022-11-16 11:26:11,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.75) internal successors, (883), 4 states have internal predecessors, (883), 0 states have call successors, (0), 0 states 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 11:26:11,218 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:11,218 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] [2022-11-16 11:26:11,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:26:11,218 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash -735611428, now seen corresponding path program 1 times [2022-11-16 11:26:11,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:11,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561946129] [2022-11-16 11:26:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:11,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:11,761 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 11:26:11,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:11,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561946129] [2022-11-16 11:26:11,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561946129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:11,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:11,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 11:26:11,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458157075] [2022-11-16 11:26:11,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:11,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:26:11,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:11,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:26:11,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:26:11,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 249 [2022-11-16 11:26:11,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 264 transitions, 937 flow. Second operand has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states 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 11:26:11,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:11,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 249 [2022-11-16 11:26:11,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:14,856 INFO L130 PetriNetUnfolder]: 2007/9970 cut-off events. [2022-11-16 11:26:14,856 INFO L131 PetriNetUnfolder]: For 3494/3494 co-relation queries the response was YES. [2022-11-16 11:26:14,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17230 conditions, 9970 events. 2007/9970 cut-off events. For 3494/3494 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 109910 event pairs, 1158 based on Foata normal form. 36/8909 useless extension candidates. Maximal degree in co-relation 14663. Up to 2894 conditions per place. [2022-11-16 11:26:14,954 INFO L137 encePairwiseOnDemand]: 229/249 looper letters, 103 selfloop transitions, 36 changer transitions 0/295 dead transitions. [2022-11-16 11:26:14,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 295 transitions, 1312 flow [2022-11-16 11:26:14,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:26:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-16 11:26:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2973 transitions. [2022-11-16 11:26:14,960 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6633199464524766 [2022-11-16 11:26:14,961 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2973 transitions. [2022-11-16 11:26:14,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2973 transitions. [2022-11-16 11:26:14,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:14,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2973 transitions. [2022-11-16 11:26:14,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 165.16666666666666) internal successors, (2973), 18 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states 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 11:26:14,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states 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 11:26:14,977 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states 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 11:26:14,978 INFO L175 Difference]: Start difference. First operand has 278 places, 264 transitions, 937 flow. Second operand 18 states and 2973 transitions. [2022-11-16 11:26:14,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 295 transitions, 1312 flow [2022-11-16 11:26:15,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 295 transitions, 1310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:26:15,005 INFO L231 Difference]: Finished difference. Result has 297 places, 266 transitions, 1042 flow [2022-11-16 11:26:15,006 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1042, PETRI_PLACES=297, PETRI_TRANSITIONS=266} [2022-11-16 11:26:15,007 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 96 predicate places. [2022-11-16 11:26:15,007 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 266 transitions, 1042 flow [2022-11-16 11:26:15,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.0) internal successors, (1956), 12 states have internal predecessors, (1956), 0 states have call successors, (0), 0 states 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 11:26:15,008 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:15,009 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] [2022-11-16 11:26:15,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:26:15,009 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash 306531321, now seen corresponding path program 1 times [2022-11-16 11:26:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:15,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511632265] [2022-11-16 11:26:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:15,494 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 11:26:15,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:15,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511632265] [2022-11-16 11:26:15,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511632265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:15,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060875989] [2022-11-16 11:26:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:15,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:15,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:15,501 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:15,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:26:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:15,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:26:15,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:16,096 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 11:26:16,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:16,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060875989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:16,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:26:16,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2022-11-16 11:26:16,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407820128] [2022-11-16 11:26:16,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:16,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:26:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:26:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:26:16,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 249 [2022-11-16 11:26:16,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 266 transitions, 1042 flow. Second operand has 9 states, 9 states have (on average 169.11111111111111) internal successors, (1522), 9 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states 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 11:26:16,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:16,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 249 [2022-11-16 11:26:16,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:18,593 INFO L130 PetriNetUnfolder]: 1818/9546 cut-off events. [2022-11-16 11:26:18,594 INFO L131 PetriNetUnfolder]: For 5603/5603 co-relation queries the response was YES. [2022-11-16 11:26:18,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15985 conditions, 9546 events. 1818/9546 cut-off events. For 5603/5603 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 105245 event pairs, 1182 based on Foata normal form. 175/8655 useless extension candidates. Maximal degree in co-relation 14744. Up to 3174 conditions per place. [2022-11-16 11:26:18,698 INFO L137 encePairwiseOnDemand]: 235/249 looper letters, 56 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2022-11-16 11:26:18,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 261 transitions, 1144 flow [2022-11-16 11:26:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:26:18,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-16 11:26:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1867 transitions. [2022-11-16 11:26:18,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6816356334428624 [2022-11-16 11:26:18,706 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1867 transitions. [2022-11-16 11:26:18,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1867 transitions. [2022-11-16 11:26:18,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:18,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1867 transitions. [2022-11-16 11:26:18,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 169.72727272727272) internal successors, (1867), 11 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states 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 11:26:18,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states 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 11:26:18,720 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 249.0) internal successors, (2988), 12 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states 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 11:26:18,720 INFO L175 Difference]: Start difference. First operand has 297 places, 266 transitions, 1042 flow. Second operand 11 states and 1867 transitions. [2022-11-16 11:26:18,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 261 transitions, 1144 flow [2022-11-16 11:26:18,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 261 transitions, 1070 flow, removed 1 selfloop flow, removed 19 redundant places. [2022-11-16 11:26:18,833 INFO L231 Difference]: Finished difference. Result has 285 places, 261 transitions, 958 flow [2022-11-16 11:26:18,833 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=958, PETRI_PLACES=285, PETRI_TRANSITIONS=261} [2022-11-16 11:26:18,834 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 84 predicate places. [2022-11-16 11:26:18,835 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 261 transitions, 958 flow [2022-11-16 11:26:18,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.11111111111111) internal successors, (1522), 9 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states 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 11:26:18,836 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:18,836 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] [2022-11-16 11:26:18,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:19,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 11:26:19,041 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:19,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:19,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1978621687, now seen corresponding path program 1 times [2022-11-16 11:26:19,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:19,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974124235] [2022-11-16 11:26:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:19,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:19,539 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 11:26:19,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:19,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974124235] [2022-11-16 11:26:19,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974124235] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:19,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376629951] [2022-11-16 11:26:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:19,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:19,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:19,542 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:19,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:26:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:19,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:26:19,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:20,184 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 11:26:20,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:20,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376629951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:20,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:26:20,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 20 [2022-11-16 11:26:20,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658141143] [2022-11-16 11:26:20,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:20,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:26:20,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:26:20,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:26:20,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 249 [2022-11-16 11:26:20,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 261 transitions, 958 flow. Second operand has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states 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 11:26:20,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:20,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 249 [2022-11-16 11:26:20,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:22,086 INFO L130 PetriNetUnfolder]: 1506/8154 cut-off events. [2022-11-16 11:26:22,087 INFO L131 PetriNetUnfolder]: For 2179/2179 co-relation queries the response was YES. [2022-11-16 11:26:22,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12669 conditions, 8154 events. 1506/8154 cut-off events. For 2179/2179 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 86583 event pairs, 930 based on Foata normal form. 276/7460 useless extension candidates. Maximal degree in co-relation 11110. Up to 2539 conditions per place. [2022-11-16 11:26:22,167 INFO L137 encePairwiseOnDemand]: 231/249 looper letters, 45 selfloop transitions, 29 changer transitions 0/257 dead transitions. [2022-11-16 11:26:22,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 257 transitions, 1076 flow [2022-11-16 11:26:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:26:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:26:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2195 transitions. [2022-11-16 11:26:22,171 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6780970033982082 [2022-11-16 11:26:22,171 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2195 transitions. [2022-11-16 11:26:22,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2195 transitions. [2022-11-16 11:26:22,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:22,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2195 transitions. [2022-11-16 11:26:22,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 168.84615384615384) internal successors, (2195), 13 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states 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 11:26:22,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states 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 11:26:22,185 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states 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 11:26:22,185 INFO L175 Difference]: Start difference. First operand has 285 places, 261 transitions, 958 flow. Second operand 13 states and 2195 transitions. [2022-11-16 11:26:22,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 257 transitions, 1076 flow [2022-11-16 11:26:22,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 257 transitions, 1010 flow, removed 0 selfloop flow, removed 15 redundant places. [2022-11-16 11:26:22,202 INFO L231 Difference]: Finished difference. Result has 279 places, 257 transitions, 920 flow [2022-11-16 11:26:22,203 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=920, PETRI_PLACES=279, PETRI_TRANSITIONS=257} [2022-11-16 11:26:22,205 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 78 predicate places. [2022-11-16 11:26:22,205 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 257 transitions, 920 flow [2022-11-16 11:26:22,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 169.22222222222223) internal successors, (1523), 9 states have internal predecessors, (1523), 0 states have call successors, (0), 0 states 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 11:26:22,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:22,206 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] [2022-11-16 11:26:22,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:22,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:22,412 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:22,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1003320504, now seen corresponding path program 1 times [2022-11-16 11:26:22,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:22,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418213408] [2022-11-16 11:26:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:22,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:22,493 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 11:26:22,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418213408] [2022-11-16 11:26:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418213408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:22,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:22,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:26:22,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411745388] [2022-11-16 11:26:22,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:22,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:26:22,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:26:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:26:22,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-16 11:26:22,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 257 transitions, 920 flow. Second operand has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 11:26:22,500 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:22,500 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-16 11:26:22,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:24,001 INFO L130 PetriNetUnfolder]: 1746/7178 cut-off events. [2022-11-16 11:26:24,002 INFO L131 PetriNetUnfolder]: For 1583/1607 co-relation queries the response was YES. [2022-11-16 11:26:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11071 conditions, 7178 events. 1746/7178 cut-off events. For 1583/1607 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 83254 event pairs, 684 based on Foata normal form. 0/5626 useless extension candidates. Maximal degree in co-relation 9404. Up to 1709 conditions per place. [2022-11-16 11:26:24,066 INFO L137 encePairwiseOnDemand]: 243/249 looper letters, 27 selfloop transitions, 4 changer transitions 0/271 dead transitions. [2022-11-16 11:26:24,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 271 transitions, 1013 flow [2022-11-16 11:26:24,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:26:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 11:26:24,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1128 transitions. [2022-11-16 11:26:24,069 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9060240963855422 [2022-11-16 11:26:24,069 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1128 transitions. [2022-11-16 11:26:24,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1128 transitions. [2022-11-16 11:26:24,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:24,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1128 transitions. [2022-11-16 11:26:24,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 225.6) internal successors, (1128), 5 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:26:24,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 11:26:24,075 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states 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 11:26:24,076 INFO L175 Difference]: Start difference. First operand has 279 places, 257 transitions, 920 flow. Second operand 5 states and 1128 transitions. [2022-11-16 11:26:24,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 271 transitions, 1013 flow [2022-11-16 11:26:24,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 271 transitions, 955 flow, removed 0 selfloop flow, removed 12 redundant places. [2022-11-16 11:26:24,085 INFO L231 Difference]: Finished difference. Result has 274 places, 260 transitions, 892 flow [2022-11-16 11:26:24,086 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=892, PETRI_PLACES=274, PETRI_TRANSITIONS=260} [2022-11-16 11:26:24,087 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 73 predicate places. [2022-11-16 11:26:24,087 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 260 transitions, 892 flow [2022-11-16 11:26:24,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 11:26:24,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:24,088 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:26:24,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:26:24,089 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2144894863, now seen corresponding path program 1 times [2022-11-16 11:26:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:24,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894945700] [2022-11-16 11:26:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:24,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:26:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894945700] [2022-11-16 11:26:24,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894945700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:24,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:24,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:26:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054384855] [2022-11-16 11:26:24,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:24,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:26:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:26:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:26:24,253 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-16 11:26:24,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 260 transitions, 892 flow. Second operand has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states 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 11:26:24,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:24,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-16 11:26:24,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:26,546 INFO L130 PetriNetUnfolder]: 2969/11438 cut-off events. [2022-11-16 11:26:26,546 INFO L131 PetriNetUnfolder]: For 2263/2305 co-relation queries the response was YES. [2022-11-16 11:26:26,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20197 conditions, 11438 events. 2969/11438 cut-off events. For 2263/2305 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 125755 event pairs, 1941 based on Foata normal form. 7/9947 useless extension candidates. Maximal degree in co-relation 17265. Up to 4348 conditions per place. [2022-11-16 11:26:26,665 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 118 selfloop transitions, 22 changer transitions 5/311 dead transitions. [2022-11-16 11:26:26,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 311 transitions, 1385 flow [2022-11-16 11:26:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:26:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:26:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1944 transitions. [2022-11-16 11:26:26,678 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7807228915662651 [2022-11-16 11:26:26,678 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1944 transitions. [2022-11-16 11:26:26,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1944 transitions. [2022-11-16 11:26:26,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:26,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1944 transitions. [2022-11-16 11:26:26,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.4) internal successors, (1944), 10 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states 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 11:26:26,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states 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 11:26:26,698 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states 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 11:26:26,698 INFO L175 Difference]: Start difference. First operand has 274 places, 260 transitions, 892 flow. Second operand 10 states and 1944 transitions. [2022-11-16 11:26:26,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 311 transitions, 1385 flow [2022-11-16 11:26:26,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 311 transitions, 1383 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-16 11:26:26,718 INFO L231 Difference]: Finished difference. Result has 284 places, 261 transitions, 947 flow [2022-11-16 11:26:26,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=947, PETRI_PLACES=284, PETRI_TRANSITIONS=261} [2022-11-16 11:26:26,721 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 83 predicate places. [2022-11-16 11:26:26,721 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 261 transitions, 947 flow [2022-11-16 11:26:26,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.71428571428572) internal successors, (1328), 7 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states 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 11:26:26,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:26,723 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:26:26,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:26:26,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:26,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:26,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1873100685, now seen corresponding path program 1 times [2022-11-16 11:26:26,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:26,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814934310] [2022-11-16 11:26:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:26,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:26:26,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:26,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814934310] [2022-11-16 11:26:26,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814934310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:26,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:26,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:26:26,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755344732] [2022-11-16 11:26:26,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:26,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:26:26,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:26,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:26:26,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:26:26,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-16 11:26:26,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 261 transitions, 947 flow. Second operand has 7 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states 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 11:26:26,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:26,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-16 11:26:26,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:29,261 INFO L130 PetriNetUnfolder]: 3151/11597 cut-off events. [2022-11-16 11:26:29,261 INFO L131 PetriNetUnfolder]: For 3261/3326 co-relation queries the response was YES. [2022-11-16 11:26:29,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20494 conditions, 11597 events. 3151/11597 cut-off events. For 3261/3326 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 124441 event pairs, 2156 based on Foata normal form. 41/10578 useless extension candidates. Maximal degree in co-relation 17838. Up to 5003 conditions per place. [2022-11-16 11:26:29,334 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 94 selfloop transitions, 21 changer transitions 28/309 dead transitions. [2022-11-16 11:26:29,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 309 transitions, 1426 flow [2022-11-16 11:26:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:26:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-16 11:26:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1941 transitions. [2022-11-16 11:26:29,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7795180722891566 [2022-11-16 11:26:29,338 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1941 transitions. [2022-11-16 11:26:29,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1941 transitions. [2022-11-16 11:26:29,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:29,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1941 transitions. [2022-11-16 11:26:29,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 194.1) internal successors, (1941), 10 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states 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 11:26:29,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states 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 11:26:29,348 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 249.0) internal successors, (2739), 11 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states 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 11:26:29,348 INFO L175 Difference]: Start difference. First operand has 284 places, 261 transitions, 947 flow. Second operand 10 states and 1941 transitions. [2022-11-16 11:26:29,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 309 transitions, 1426 flow [2022-11-16 11:26:29,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 309 transitions, 1387 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 11:26:29,364 INFO L231 Difference]: Finished difference. Result has 288 places, 260 transitions, 949 flow [2022-11-16 11:26:29,365 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=949, PETRI_PLACES=288, PETRI_TRANSITIONS=260} [2022-11-16 11:26:29,366 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 87 predicate places. [2022-11-16 11:26:29,366 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 260 transitions, 949 flow [2022-11-16 11:26:29,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states 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 11:26:29,367 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:29,367 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:26:29,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:26:29,368 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:29,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1253562000, now seen corresponding path program 1 times [2022-11-16 11:26:29,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:29,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015117551] [2022-11-16 11:26:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:26:29,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:29,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015117551] [2022-11-16 11:26:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015117551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:29,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:29,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:26:29,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309238333] [2022-11-16 11:26:29,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:29,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:26:29,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:29,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:26:29,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:26:29,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-16 11:26:29,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 260 transitions, 949 flow. Second operand has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 11:26:29,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:29,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-16 11:26:29,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:31,234 INFO L130 PetriNetUnfolder]: 2112/8192 cut-off events. [2022-11-16 11:26:31,234 INFO L131 PetriNetUnfolder]: For 2414/2445 co-relation queries the response was YES. [2022-11-16 11:26:31,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15137 conditions, 8192 events. 2112/8192 cut-off events. For 2414/2445 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 83911 event pairs, 1614 based on Foata normal form. 11/7526 useless extension candidates. Maximal degree in co-relation 14319. Up to 3808 conditions per place. [2022-11-16 11:26:31,307 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 95 selfloop transitions, 15 changer transitions 6/282 dead transitions. [2022-11-16 11:26:31,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 282 transitions, 1246 flow [2022-11-16 11:26:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:26:31,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:26:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1560 transitions. [2022-11-16 11:26:31,312 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7831325301204819 [2022-11-16 11:26:31,312 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1560 transitions. [2022-11-16 11:26:31,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1560 transitions. [2022-11-16 11:26:31,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:31,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1560 transitions. [2022-11-16 11:26:31,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 195.0) internal successors, (1560), 8 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states 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 11:26:31,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states 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 11:26:31,323 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states 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 11:26:31,323 INFO L175 Difference]: Start difference. First operand has 288 places, 260 transitions, 949 flow. Second operand 8 states and 1560 transitions. [2022-11-16 11:26:31,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 282 transitions, 1246 flow [2022-11-16 11:26:31,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 282 transitions, 1193 flow, removed 4 selfloop flow, removed 11 redundant places. [2022-11-16 11:26:31,342 INFO L231 Difference]: Finished difference. Result has 284 places, 261 transitions, 943 flow [2022-11-16 11:26:31,343 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=284, PETRI_TRANSITIONS=261} [2022-11-16 11:26:31,344 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 83 predicate places. [2022-11-16 11:26:31,344 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 261 transitions, 943 flow [2022-11-16 11:26:31,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states 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 11:26:31,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:31,345 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:26:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:26:31,346 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:31,347 INFO L85 PathProgramCache]: Analyzing trace with hash -290208942, now seen corresponding path program 1 times [2022-11-16 11:26:31,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:31,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853122396] [2022-11-16 11:26:31,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:31,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:26:31,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:31,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853122396] [2022-11-16 11:26:31,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853122396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:31,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:26:31,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:26:31,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451772713] [2022-11-16 11:26:31,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:31,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:26:31,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:31,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:26:31,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:26:31,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 249 [2022-11-16 11:26:31,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 261 transitions, 943 flow. Second operand has 7 states, 7 states have (on average 190.42857142857142) internal successors, (1333), 7 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states 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 11:26:31,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:31,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 249 [2022-11-16 11:26:31,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:33,543 INFO L130 PetriNetUnfolder]: 2567/9582 cut-off events. [2022-11-16 11:26:33,543 INFO L131 PetriNetUnfolder]: For 2870/2875 co-relation queries the response was YES. [2022-11-16 11:26:33,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16964 conditions, 9582 events. 2567/9582 cut-off events. For 2870/2875 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 99417 event pairs, 1830 based on Foata normal form. 5/8745 useless extension candidates. Maximal degree in co-relation 16154. Up to 4354 conditions per place. [2022-11-16 11:26:33,622 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 80 selfloop transitions, 13 changer transitions 21/280 dead transitions. [2022-11-16 11:26:33,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 280 transitions, 1222 flow [2022-11-16 11:26:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:26:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 11:26:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1557 transitions. [2022-11-16 11:26:33,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7816265060240963 [2022-11-16 11:26:33,626 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1557 transitions. [2022-11-16 11:26:33,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1557 transitions. [2022-11-16 11:26:33,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:33,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1557 transitions. [2022-11-16 11:26:33,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 194.625) internal successors, (1557), 8 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states 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 11:26:33,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states 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 11:26:33,636 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 249.0) internal successors, (2241), 9 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states 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 11:26:33,636 INFO L175 Difference]: Start difference. First operand has 284 places, 261 transitions, 943 flow. Second operand 8 states and 1557 transitions. [2022-11-16 11:26:33,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 280 transitions, 1222 flow [2022-11-16 11:26:33,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 280 transitions, 1195 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-11-16 11:26:33,654 INFO L231 Difference]: Finished difference. Result has 288 places, 257 transitions, 921 flow [2022-11-16 11:26:33,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=921, PETRI_PLACES=288, PETRI_TRANSITIONS=257} [2022-11-16 11:26:33,656 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 87 predicate places. [2022-11-16 11:26:33,656 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 257 transitions, 921 flow [2022-11-16 11:26:33,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.42857142857142) internal successors, (1333), 7 states have internal predecessors, (1333), 0 states have call successors, (0), 0 states 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 11:26:33,657 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:33,657 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:26:33,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:26:33,658 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1000289064, now seen corresponding path program 1 times [2022-11-16 11:26:33,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:33,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913401541] [2022-11-16 11:26:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:33,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:33,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913401541] [2022-11-16 11:26:33,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913401541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:33,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43831671] [2022-11-16 11:26:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:33,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:33,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:33,903 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:33,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:26:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:34,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:26:34,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:34,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:34,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43831671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:34,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:34,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-16 11:26:34,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163539328] [2022-11-16 11:26:34,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:34,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:26:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:34,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:26:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:26:34,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 249 [2022-11-16 11:26:34,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 257 transitions, 921 flow. Second operand has 28 states, 28 states have (on average 173.10714285714286) internal successors, (4847), 28 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states 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 11:26:34,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:34,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 249 [2022-11-16 11:26:34,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:39,751 INFO L130 PetriNetUnfolder]: 3773/14709 cut-off events. [2022-11-16 11:26:39,751 INFO L131 PetriNetUnfolder]: For 4137/4148 co-relation queries the response was YES. [2022-11-16 11:26:39,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27796 conditions, 14709 events. 3773/14709 cut-off events. For 4137/4148 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 175063 event pairs, 2093 based on Foata normal form. 90/13731 useless extension candidates. Maximal degree in co-relation 23036. Up to 3705 conditions per place. [2022-11-16 11:26:39,870 INFO L137 encePairwiseOnDemand]: 223/249 looper letters, 221 selfloop transitions, 78 changer transitions 62/499 dead transitions. [2022-11-16 11:26:39,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 499 transitions, 2493 flow [2022-11-16 11:26:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 11:26:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-16 11:26:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 8922 transitions. [2022-11-16 11:26:39,885 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7025750059059769 [2022-11-16 11:26:39,886 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 8922 transitions. [2022-11-16 11:26:39,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 8922 transitions. [2022-11-16 11:26:39,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:39,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 8922 transitions. [2022-11-16 11:26:39,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 174.94117647058823) internal successors, (8922), 51 states have internal predecessors, (8922), 0 states have call successors, (0), 0 states 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 11:26:39,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 249.0) internal successors, (12948), 52 states have internal predecessors, (12948), 0 states have call successors, (0), 0 states 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 11:26:39,931 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 249.0) internal successors, (12948), 52 states have internal predecessors, (12948), 0 states have call successors, (0), 0 states 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 11:26:39,931 INFO L175 Difference]: Start difference. First operand has 288 places, 257 transitions, 921 flow. Second operand 51 states and 8922 transitions. [2022-11-16 11:26:39,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 499 transitions, 2493 flow [2022-11-16 11:26:39,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 499 transitions, 2373 flow, removed 27 selfloop flow, removed 10 redundant places. [2022-11-16 11:26:39,970 INFO L231 Difference]: Finished difference. Result has 328 places, 291 transitions, 1230 flow [2022-11-16 11:26:39,971 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1230, PETRI_PLACES=328, PETRI_TRANSITIONS=291} [2022-11-16 11:26:39,971 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 127 predicate places. [2022-11-16 11:26:39,971 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 291 transitions, 1230 flow [2022-11-16 11:26:39,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.10714285714286) internal successors, (4847), 28 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states 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 11:26:39,974 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:39,974 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:26:39,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:40,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:26:40,180 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:40,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1475550310, now seen corresponding path program 1 times [2022-11-16 11:26:40,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:40,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348582670] [2022-11-16 11:26:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:40,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348582670] [2022-11-16 11:26:40,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348582670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317226411] [2022-11-16 11:26:40,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:40,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:40,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:40,463 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:40,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:26:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:40,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:26:40,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:40,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:26:41,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317226411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:41,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:41,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-16 11:26:41,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937827858] [2022-11-16 11:26:41,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:41,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:26:41,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:26:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:26:41,385 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 249 [2022-11-16 11:26:41,389 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 291 transitions, 1230 flow. Second operand has 28 states, 28 states have (on average 173.17857142857142) internal successors, (4849), 28 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states 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 11:26:41,389 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:41,389 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 249 [2022-11-16 11:26:41,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:46,859 INFO L130 PetriNetUnfolder]: 4841/17239 cut-off events. [2022-11-16 11:26:46,859 INFO L131 PetriNetUnfolder]: For 10722/10941 co-relation queries the response was YES. [2022-11-16 11:26:46,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32680 conditions, 17239 events. 4841/17239 cut-off events. For 10722/10941 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 209579 event pairs, 2051 based on Foata normal form. 219/15834 useless extension candidates. Maximal degree in co-relation 27011. Up to 4420 conditions per place. [2022-11-16 11:26:47,001 INFO L137 encePairwiseOnDemand]: 223/249 looper letters, 120 selfloop transitions, 55 changer transitions 190/503 dead transitions. [2022-11-16 11:26:47,001 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 503 transitions, 2655 flow [2022-11-16 11:26:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-16 11:26:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-16 11:26:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 8745 transitions. [2022-11-16 11:26:47,020 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7024096385542169 [2022-11-16 11:26:47,020 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 8745 transitions. [2022-11-16 11:26:47,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 8745 transitions. [2022-11-16 11:26:47,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:47,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 8745 transitions. [2022-11-16 11:26:47,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 174.9) internal successors, (8745), 50 states have internal predecessors, (8745), 0 states have call successors, (0), 0 states 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 11:26:47,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states 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 11:26:47,089 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 249.0) internal successors, (12699), 51 states have internal predecessors, (12699), 0 states have call successors, (0), 0 states 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 11:26:47,090 INFO L175 Difference]: Start difference. First operand has 328 places, 291 transitions, 1230 flow. Second operand 50 states and 8745 transitions. [2022-11-16 11:26:47,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 503 transitions, 2655 flow [2022-11-16 11:26:47,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 503 transitions, 2572 flow, removed 6 selfloop flow, removed 19 redundant places. [2022-11-16 11:26:47,156 INFO L231 Difference]: Finished difference. Result has 375 places, 275 transitions, 1179 flow [2022-11-16 11:26:47,156 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1179, PETRI_PLACES=375, PETRI_TRANSITIONS=275} [2022-11-16 11:26:47,157 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 174 predicate places. [2022-11-16 11:26:47,157 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 275 transitions, 1179 flow [2022-11-16 11:26:47,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 173.17857142857142) internal successors, (4849), 28 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states 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 11:26:47,159 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:47,159 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:26:47,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:47,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:26:47,365 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:47,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1960128126, now seen corresponding path program 1 times [2022-11-16 11:26:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:47,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275480737] [2022-11-16 11:26:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:47,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:47,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275480737] [2022-11-16 11:26:47,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275480737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:47,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479933649] [2022-11-16 11:26:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:47,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:47,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:47,767 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:47,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:26:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:26:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:48,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:26:48,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479933649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:48,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:48,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2022-11-16 11:26:48,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238867695] [2022-11-16 11:26:48,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:48,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-16 11:26:48,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:48,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-16 11:26:48,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:26:48,461 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 249 [2022-11-16 11:26:48,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 275 transitions, 1179 flow. Second operand has 32 states, 32 states have (on average 212.28125) internal successors, (6793), 32 states have internal predecessors, (6793), 0 states have call successors, (0), 0 states 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 11:26:48,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:48,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 249 [2022-11-16 11:26:48,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:50,594 INFO L130 PetriNetUnfolder]: 120/3824 cut-off events. [2022-11-16 11:26:50,594 INFO L131 PetriNetUnfolder]: For 2403/2429 co-relation queries the response was YES. [2022-11-16 11:26:50,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 3824 events. 120/3824 cut-off events. For 2403/2429 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 30479 event pairs, 0 based on Foata normal form. 24/3653 useless extension candidates. Maximal degree in co-relation 5714. Up to 98 conditions per place. [2022-11-16 11:26:50,635 INFO L137 encePairwiseOnDemand]: 237/249 looper letters, 208 selfloop transitions, 119 changer transitions 0/513 dead transitions. [2022-11-16 11:26:50,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 513 transitions, 2996 flow [2022-11-16 11:26:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 11:26:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-16 11:26:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 9498 transitions. [2022-11-16 11:26:50,651 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8669222343921139 [2022-11-16 11:26:50,651 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 9498 transitions. [2022-11-16 11:26:50,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 9498 transitions. [2022-11-16 11:26:50,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:50,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 9498 transitions. [2022-11-16 11:26:50,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 215.86363636363637) internal successors, (9498), 44 states have internal predecessors, (9498), 0 states have call successors, (0), 0 states 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 11:26:50,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states 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 11:26:50,682 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states 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 11:26:50,683 INFO L175 Difference]: Start difference. First operand has 375 places, 275 transitions, 1179 flow. Second operand 44 states and 9498 transitions. [2022-11-16 11:26:50,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 513 transitions, 2996 flow [2022-11-16 11:26:50,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 513 transitions, 2743 flow, removed 26 selfloop flow, removed 51 redundant places. [2022-11-16 11:26:50,708 INFO L231 Difference]: Finished difference. Result has 344 places, 343 transitions, 1793 flow [2022-11-16 11:26:50,708 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1793, PETRI_PLACES=344, PETRI_TRANSITIONS=343} [2022-11-16 11:26:50,709 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 143 predicate places. [2022-11-16 11:26:50,709 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 343 transitions, 1793 flow [2022-11-16 11:26:50,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 212.28125) internal successors, (6793), 32 states have internal predecessors, (6793), 0 states have call successors, (0), 0 states 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 11:26:50,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:50,711 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:26:50,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:50,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:26:50,920 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:50,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:50,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1817064977, now seen corresponding path program 2 times [2022-11-16 11:26:50,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:50,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066607580] [2022-11-16 11:26:50,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:50,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:26:51,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066607580] [2022-11-16 11:26:51,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066607580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:51,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674692665] [2022-11-16 11:26:51,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:26:51,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:51,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:51,056 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:51,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:26:51,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:26:51,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:26:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:26:51,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 11:26:51,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:26:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 11:26:51,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674692665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:26:51,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:26:51,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-16 11:26:51,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80171772] [2022-11-16 11:26:51,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:26:51,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:26:51,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:51,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:26:51,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:26:51,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 249 [2022-11-16 11:26:51,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 343 transitions, 1793 flow. Second operand has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states 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 11:26:51,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:51,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 249 [2022-11-16 11:26:51,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:26:58,065 INFO L130 PetriNetUnfolder]: 7998/28043 cut-off events. [2022-11-16 11:26:58,065 INFO L131 PetriNetUnfolder]: For 4946/4959 co-relation queries the response was YES. [2022-11-16 11:26:58,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50203 conditions, 28043 events. 7998/28043 cut-off events. For 4946/4959 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 328734 event pairs, 741 based on Foata normal form. 325/24817 useless extension candidates. Maximal degree in co-relation 49599. Up to 3224 conditions per place. [2022-11-16 11:26:58,584 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 106 selfloop transitions, 15 changer transitions 0/430 dead transitions. [2022-11-16 11:26:58,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 430 transitions, 2260 flow [2022-11-16 11:26:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:26:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:26:58,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2736 transitions. [2022-11-16 11:26:58,588 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.845227062094532 [2022-11-16 11:26:58,588 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2736 transitions. [2022-11-16 11:26:58,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2736 transitions. [2022-11-16 11:26:58,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:26:58,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2736 transitions. [2022-11-16 11:26:58,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 210.46153846153845) internal successors, (2736), 13 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states 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 11:26:58,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states 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 11:26:58,604 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states 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 11:26:58,604 INFO L175 Difference]: Start difference. First operand has 344 places, 343 transitions, 1793 flow. Second operand 13 states and 2736 transitions. [2022-11-16 11:26:58,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 430 transitions, 2260 flow [2022-11-16 11:26:58,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 430 transitions, 2178 flow, removed 1 selfloop flow, removed 15 redundant places. [2022-11-16 11:26:58,648 INFO L231 Difference]: Finished difference. Result has 342 places, 347 transitions, 1768 flow [2022-11-16 11:26:58,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1768, PETRI_PLACES=342, PETRI_TRANSITIONS=347} [2022-11-16 11:26:58,649 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 141 predicate places. [2022-11-16 11:26:58,649 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 347 transitions, 1768 flow [2022-11-16 11:26:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.0) internal successors, (2050), 10 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states 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 11:26:58,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:26:58,650 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:26:58,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:26:58,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:58,856 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:26:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:26:58,856 INFO L85 PathProgramCache]: Analyzing trace with hash 494440085, now seen corresponding path program 1 times [2022-11-16 11:26:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:26:58,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483470146] [2022-11-16 11:26:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:58,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:26:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:58,979 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:26:58,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:26:58,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483470146] [2022-11-16 11:26:58,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483470146] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:26:58,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129747852] [2022-11-16 11:26:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:26:58,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:26:58,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:26:58,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:26:59,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:26:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:26:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:26:59,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:26:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:26:59,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:26:59,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129747852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:26:59,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:26:59,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:26:59,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916029274] [2022-11-16 11:26:59,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:26:59,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:26:59,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:26:59,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:26:59,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:26:59,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-16 11:26:59,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 347 transitions, 1768 flow. Second operand has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states 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 11:26:59,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:26:59,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-16 11:26:59,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:27:00,712 INFO L130 PetriNetUnfolder]: 627/6333 cut-off events. [2022-11-16 11:27:00,713 INFO L131 PetriNetUnfolder]: For 2098/2111 co-relation queries the response was YES. [2022-11-16 11:27:00,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11117 conditions, 6333 events. 627/6333 cut-off events. For 2098/2111 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 59634 event pairs, 0 based on Foata normal form. 65/6019 useless extension candidates. Maximal degree in co-relation 10547. Up to 728 conditions per place. [2022-11-16 11:27:00,768 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 29 selfloop transitions, 8 changer transitions 0/360 dead transitions. [2022-11-16 11:27:00,768 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 360 transitions, 1873 flow [2022-11-16 11:27:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:27:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:27:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1567 transitions. [2022-11-16 11:27:00,770 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8990246701090074 [2022-11-16 11:27:00,770 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1567 transitions. [2022-11-16 11:27:00,771 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1567 transitions. [2022-11-16 11:27:00,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:27:00,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1567 transitions. [2022-11-16 11:27:00,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 223.85714285714286) internal successors, (1567), 7 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states 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 11:27:00,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 11:27:00,775 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 11:27:00,775 INFO L175 Difference]: Start difference. First operand has 342 places, 347 transitions, 1768 flow. Second operand 7 states and 1567 transitions. [2022-11-16 11:27:00,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 360 transitions, 1873 flow [2022-11-16 11:27:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 360 transitions, 1838 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-16 11:27:00,800 INFO L231 Difference]: Finished difference. Result has 337 places, 345 transitions, 1736 flow [2022-11-16 11:27:00,801 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1736, PETRI_PLACES=337, PETRI_TRANSITIONS=345} [2022-11-16 11:27:00,801 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 136 predicate places. [2022-11-16 11:27:00,801 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 345 transitions, 1736 flow [2022-11-16 11:27:00,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states 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 11:27:00,802 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:27:00,802 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:27:00,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:01,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:01,008 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:27:01,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:01,009 INFO L85 PathProgramCache]: Analyzing trace with hash 533380627, now seen corresponding path program 2 times [2022-11-16 11:27:01,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:27:01,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280022086] [2022-11-16 11:27:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:01,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:27:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:27:01,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:27:01,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280022086] [2022-11-16 11:27:01,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280022086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:27:01,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201811613] [2022-11-16 11:27:01,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:27:01,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:01,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:27:01,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:27:01,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:27:01,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:27:01,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:27:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:27:01,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 11:27:01,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:27:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 11:27:01,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201811613] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:27:01,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:27:01,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-16 11:27:01,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843406943] [2022-11-16 11:27:01,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:27:01,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:27:01,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:27:01,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:27:01,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:27:01,646 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 249 [2022-11-16 11:27:01,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 345 transitions, 1736 flow. Second operand has 10 states, 10 states have (on average 205.2) internal successors, (2052), 10 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 11:27:01,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:27:01,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 249 [2022-11-16 11:27:01,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:27:14,768 INFO L130 PetriNetUnfolder]: 18736/58827 cut-off events. [2022-11-16 11:27:14,768 INFO L131 PetriNetUnfolder]: For 16321/17413 co-relation queries the response was YES. [2022-11-16 11:27:15,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107890 conditions, 58827 events. 18736/58827 cut-off events. For 16321/17413 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 758526 event pairs, 1599 based on Foata normal form. 1846/55107 useless extension candidates. Maximal degree in co-relation 107294. Up to 6981 conditions per place. [2022-11-16 11:27:15,351 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 113 selfloop transitions, 15 changer transitions 0/438 dead transitions. [2022-11-16 11:27:15,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 438 transitions, 2262 flow [2022-11-16 11:27:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:27:15,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-16 11:27:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2733 transitions. [2022-11-16 11:27:15,355 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8443002780352178 [2022-11-16 11:27:15,356 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2733 transitions. [2022-11-16 11:27:15,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2733 transitions. [2022-11-16 11:27:15,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:27:15,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2733 transitions. [2022-11-16 11:27:15,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 210.23076923076923) internal successors, (2733), 13 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states 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 11:27:15,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states 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 11:27:15,366 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 249.0) internal successors, (3486), 14 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states 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 11:27:15,366 INFO L175 Difference]: Start difference. First operand has 337 places, 345 transitions, 1736 flow. Second operand 13 states and 2733 transitions. [2022-11-16 11:27:15,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 438 transitions, 2262 flow [2022-11-16 11:27:15,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 438 transitions, 2246 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-16 11:27:15,495 INFO L231 Difference]: Finished difference. Result has 344 places, 349 transitions, 1777 flow [2022-11-16 11:27:15,496 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1777, PETRI_PLACES=344, PETRI_TRANSITIONS=349} [2022-11-16 11:27:15,496 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 143 predicate places. [2022-11-16 11:27:15,497 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 349 transitions, 1777 flow [2022-11-16 11:27:15,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.2) internal successors, (2052), 10 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states 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 11:27:15,497 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:27:15,498 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:27:15,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:15,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:15,703 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:27:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:15,703 INFO L85 PathProgramCache]: Analyzing trace with hash -645069063, now seen corresponding path program 1 times [2022-11-16 11:27:15,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:27:15,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847085256] [2022-11-16 11:27:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:15,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:27:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:27:15,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:27:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847085256] [2022-11-16 11:27:15,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847085256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:27:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285900224] [2022-11-16 11:27:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:15,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:15,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:27:15,837 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:27:15,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:27:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:27:15,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:27:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:27:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:27:16,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:27:16,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285900224] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:27:16,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:27:16,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-16 11:27:16,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505442803] [2022-11-16 11:27:16,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:27:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:27:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:27:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:27:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:27:16,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 249 [2022-11-16 11:27:16,028 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 349 transitions, 1777 flow. Second operand has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states 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 11:27:16,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 11:27:16,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 249 [2022-11-16 11:27:16,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 11:27:20,157 INFO L130 PetriNetUnfolder]: 4397/17812 cut-off events. [2022-11-16 11:27:20,157 INFO L131 PetriNetUnfolder]: For 8789/8867 co-relation queries the response was YES. [2022-11-16 11:27:20,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31177 conditions, 17812 events. 4397/17812 cut-off events. For 8789/8867 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 234948 event pairs, 0 based on Foata normal form. 234/14144 useless extension candidates. Maximal degree in co-relation 30581. Up to 3770 conditions per place. [2022-11-16 11:27:20,290 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 0 selfloop transitions, 0 changer transitions 119/360 dead transitions. [2022-11-16 11:27:20,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 360 transitions, 1867 flow [2022-11-16 11:27:20,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:27:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 11:27:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1565 transitions. [2022-11-16 11:27:20,293 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.897877223178428 [2022-11-16 11:27:20,293 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1565 transitions. [2022-11-16 11:27:20,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1565 transitions. [2022-11-16 11:27:20,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 11:27:20,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1565 transitions. [2022-11-16 11:27:20,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 223.57142857142858) internal successors, (1565), 7 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states 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 11:27:20,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 11:27:20,297 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 249.0) internal successors, (1992), 8 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states 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 11:27:20,297 INFO L175 Difference]: Start difference. First operand has 344 places, 349 transitions, 1777 flow. Second operand 7 states and 1565 transitions. [2022-11-16 11:27:20,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 360 transitions, 1867 flow [2022-11-16 11:27:20,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 360 transitions, 1832 flow, removed 6 selfloop flow, removed 10 redundant places. [2022-11-16 11:27:20,347 INFO L231 Difference]: Finished difference. Result has 339 places, 241 transitions, 1451 flow [2022-11-16 11:27:20,348 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1729, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1451, PETRI_PLACES=339, PETRI_TRANSITIONS=241} [2022-11-16 11:27:20,348 INFO L288 CegarLoopForPetriNet]: 201 programPoint places, 138 predicate places. [2022-11-16 11:27:20,348 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 241 transitions, 1451 flow [2022-11-16 11:27:20,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 221.83333333333334) internal successors, (1331), 6 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states 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 11:27:20,349 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 11:27:20,349 INFO L209 CegarLoopForPetriNet]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:27:20,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:27:20,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc6e03e8-2e80-44fc-bb99-000ca5a51fe0/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:27:20,557 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2022-11-16 11:27:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:27:20,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1587512962, now seen corresponding path program 2 times [2022-11-16 11:27:20,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:27:20,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63585630] [2022-11-16 11:27:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:27:20,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:27:20,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat