./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread/stack_longest-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-21 13:49:11,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:49:11,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:49:11,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:49:11,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:49:11,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:49:11,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:49:11,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:49:11,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:49:11,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:49:11,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:49:11,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:49:11,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:49:11,757 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:49:11,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:49:11,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:49:11,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:49:11,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:49:11,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:49:11,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:49:11,771 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:49:11,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:49:11,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:49:11,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:49:11,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:49:11,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:49:11,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:49:11,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:49:11,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:49:11,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:49:11,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:49:11,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:49:11,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:49:11,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:49:11,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:49:11,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:49:11,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:49:11,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:49:11,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:49:11,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:49:11,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:49:11,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 13:49:11,819 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:49:11,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:49:11,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:49:11,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:49:11,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:49:11,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:49:11,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:49:11,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:49:11,823 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:49:11,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:49:11,823 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:49:11,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:49:11,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:49:11,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:49:11,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:49:11,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:49:11,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:49:11,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:49:11,826 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 13:49:11,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:49:11,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:49:11,827 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:49:11,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:49:11,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:49:11,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:49:11,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:49:11,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:49:11,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:49:11,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:49:11,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:49:11,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:49:11,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:49:11,830 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:49:11,830 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:49:11,830 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:49:11,831 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_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 529fe0895c01c52d9b18b51c32204a307faf547c0c07b22bc1a431308affcf90 [2022-11-21 13:49:12,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:49:12,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:49:12,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:49:12,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:49:12,136 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:49:12,138 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread/stack_longest-1.i [2022-11-21 13:49:15,332 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:49:15,693 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:49:15,700 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/sv-benchmarks/c/pthread/stack_longest-1.i [2022-11-21 13:49:15,722 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/data/eb98b6fc9/2ee5a690c9c8456f9f70583d96046acf/FLAGfb84b5b8f [2022-11-21 13:49:15,742 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/data/eb98b6fc9/2ee5a690c9c8456f9f70583d96046acf [2022-11-21 13:49:15,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:49:15,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:49:15,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:49:15,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:49:15,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:49:15,758 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:49:15" (1/1) ... [2022-11-21 13:49:15,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bdd0d23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:15, skipping insertion in model container [2022-11-21 13:49:15,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:49:15" (1/1) ... [2022-11-21 13:49:15,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:49:15,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:49:16,324 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-11-21 13:49:16,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:49:16,390 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:49:16,463 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/sv-benchmarks/c/pthread/stack_longest-1.i[41530,41543] [2022-11-21 13:49:16,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:49:16,574 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:49:16,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16 WrapperNode [2022-11-21 13:49:16,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:49:16,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:49:16,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:49:16,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:49:16,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,673 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 163 [2022-11-21 13:49:16,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:49:16,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:49:16,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:49:16,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:49:16,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,699 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,724 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:49:16,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:49:16,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:49:16,741 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:49:16,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (1/1) ... [2022-11-21 13:49:16,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:49:16,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:16,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:49:16,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:49:16,840 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-21 13:49:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-21 13:49:16,841 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-21 13:49:16,841 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-21 13:49:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:49:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:49:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:49:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:49:16,842 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 13:49:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:49:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:49:16,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:49:16,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:49:16,846 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 13:49:17,132 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:49:17,134 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:49:17,549 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:49:17,561 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:49:17,567 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 13:49:17,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:49:17 BoogieIcfgContainer [2022-11-21 13:49:17,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:49:17,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:49:17,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:49:17,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:49:17,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:49:15" (1/3) ... [2022-11-21 13:49:17,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c45ca92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:49:17, skipping insertion in model container [2022-11-21 13:49:17,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:49:16" (2/3) ... [2022-11-21 13:49:17,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c45ca92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:49:17, skipping insertion in model container [2022-11-21 13:49:17,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:49:17" (3/3) ... [2022-11-21 13:49:17,590 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2022-11-21 13:49:17,605 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 13:49:17,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:49:17,615 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-21 13:49:17,615 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 13:49:17,772 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 13:49:17,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 193 transitions, 402 flow [2022-11-21 13:49:17,924 INFO L130 PetriNetUnfolder]: 10/191 cut-off events. [2022-11-21 13:49:17,925 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 13:49:17,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 191 events. 10/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 501 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 149. Up to 3 conditions per place. [2022-11-21 13:49:17,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 193 transitions, 402 flow [2022-11-21 13:49:17,945 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 178 places, 181 transitions, 371 flow [2022-11-21 13:49:17,957 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:49:17,966 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;@1d7cddae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:49:17,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2022-11-21 13:49:17,997 INFO L130 PetriNetUnfolder]: 3/79 cut-off events. [2022-11-21 13:49:18,003 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 13:49:18,004 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:18,005 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] [2022-11-21 13:49:18,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash -733571018, now seen corresponding path program 1 times [2022-11-21 13:49:18,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:18,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744346063] [2022-11-21 13:49:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:18,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:18,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:18,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744346063] [2022-11-21 13:49:18,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744346063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:18,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:18,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:49:18,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013342509] [2022-11-21 13:49:18,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:18,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:49:18,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:49:18,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:49:18,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 193 [2022-11-21 13:49:18,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 181 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:18,651 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:18,651 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 193 [2022-11-21 13:49:18,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:18,884 INFO L130 PetriNetUnfolder]: 28/363 cut-off events. [2022-11-21 13:49:18,884 INFO L131 PetriNetUnfolder]: For 53/53 co-relation queries the response was YES. [2022-11-21 13:49:18,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 363 events. 28/363 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1643 event pairs, 10 based on Foata normal form. 41/369 useless extension candidates. Maximal degree in co-relation 394. Up to 36 conditions per place. [2022-11-21 13:49:18,892 INFO L137 encePairwiseOnDemand]: 181/193 looper letters, 19 selfloop transitions, 4 changer transitions 0/181 dead transitions. [2022-11-21 13:49:18,892 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 181 transitions, 426 flow [2022-11-21 13:49:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:49:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:49:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 897 transitions. [2022-11-21 13:49:18,912 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9295336787564766 [2022-11-21 13:49:18,914 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 897 transitions. [2022-11-21 13:49:18,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 897 transitions. [2022-11-21 13:49:18,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:18,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 897 transitions. [2022-11-21 13:49:18,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 179.4) internal successors, (897), 5 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:18,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:18,941 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:18,943 INFO L175 Difference]: Start difference. First operand has 178 places, 181 transitions, 371 flow. Second operand 5 states and 897 transitions. [2022-11-21 13:49:18,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 181 transitions, 426 flow [2022-11-21 13:49:18,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 181 transitions, 415 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:18,955 INFO L231 Difference]: Finished difference. Result has 178 places, 175 transitions, 380 flow [2022-11-21 13:49:18,958 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=178, PETRI_TRANSITIONS=175} [2022-11-21 13:49:18,962 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 0 predicate places. [2022-11-21 13:49:18,962 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 175 transitions, 380 flow [2022-11-21 13:49:18,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.75) internal successors, (691), 4 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:18,964 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:18,964 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] [2022-11-21 13:49:18,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:49:18,965 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash 836642923, now seen corresponding path program 1 times [2022-11-21 13:49:18,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162009137] [2022-11-21 13:49:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:18,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:49:19,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:19,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162009137] [2022-11-21 13:49:19,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162009137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:19,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:19,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:49:19,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169377127] [2022-11-21 13:49:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:19,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:49:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:19,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:49:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:49:19,153 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 193 [2022-11-21 13:49:19,154 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 175 transitions, 380 flow. Second operand has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:19,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:19,155 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 193 [2022-11-21 13:49:19,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:19,322 INFO L130 PetriNetUnfolder]: 27/360 cut-off events. [2022-11-21 13:49:19,323 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2022-11-21 13:49:19,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 360 events. 27/360 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1591 event pairs, 3 based on Foata normal form. 2/333 useless extension candidates. Maximal degree in co-relation 395. Up to 21 conditions per place. [2022-11-21 13:49:19,329 INFO L137 encePairwiseOnDemand]: 187/193 looper letters, 12 selfloop transitions, 8 changer transitions 0/178 dead transitions. [2022-11-21 13:49:19,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 178 transitions, 427 flow [2022-11-21 13:49:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:49:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:49:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 873 transitions. [2022-11-21 13:49:19,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9046632124352332 [2022-11-21 13:49:19,333 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 873 transitions. [2022-11-21 13:49:19,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 873 transitions. [2022-11-21 13:49:19,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:19,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 873 transitions. [2022-11-21 13:49:19,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:19,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:19,341 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:19,341 INFO L175 Difference]: Start difference. First operand has 178 places, 175 transitions, 380 flow. Second operand 5 states and 873 transitions. [2022-11-21 13:49:19,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 178 transitions, 427 flow [2022-11-21 13:49:19,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 178 transitions, 425 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:49:19,348 INFO L231 Difference]: Finished difference. Result has 181 places, 175 transitions, 398 flow [2022-11-21 13:49:19,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=181, PETRI_TRANSITIONS=175} [2022-11-21 13:49:19,350 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 3 predicate places. [2022-11-21 13:49:19,350 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 175 transitions, 398 flow [2022-11-21 13:49:19,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:19,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:19,352 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] [2022-11-21 13:49:19,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:49:19,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:19,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash 166127393, now seen corresponding path program 1 times [2022-11-21 13:49:19,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:19,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891822991] [2022-11-21 13:49:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:19,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:19,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:19,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891822991] [2022-11-21 13:49:19,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891822991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:19,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799774600] [2022-11-21 13:49:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:19,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:19,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:19,618 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:19,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:49:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:19,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:49:19,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:19,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:49:19,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799774600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:19,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:49:19,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 13:49:19,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427034862] [2022-11-21 13:49:19,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:19,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:49:19,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:19,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:49:19,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:49:19,935 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 193 [2022-11-21 13:49:19,936 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 175 transitions, 398 flow. Second operand has 6 states, 6 states have (on average 173.33333333333334) internal successors, (1040), 6 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:19,936 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:19,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 193 [2022-11-21 13:49:19,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:20,108 INFO L130 PetriNetUnfolder]: 26/357 cut-off events. [2022-11-21 13:49:20,108 INFO L131 PetriNetUnfolder]: For 45/45 co-relation queries the response was YES. [2022-11-21 13:49:20,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 357 events. 26/357 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1547 event pairs, 1 based on Foata normal form. 2/330 useless extension candidates. Maximal degree in co-relation 407. Up to 15 conditions per place. [2022-11-21 13:49:20,114 INFO L137 encePairwiseOnDemand]: 188/193 looper letters, 17 selfloop transitions, 6 changer transitions 0/181 dead transitions. [2022-11-21 13:49:20,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 181 transitions, 459 flow [2022-11-21 13:49:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:49:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-21 13:49:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1221 transitions. [2022-11-21 13:49:20,120 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9037749814951888 [2022-11-21 13:49:20,120 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1221 transitions. [2022-11-21 13:49:20,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1221 transitions. [2022-11-21 13:49:20,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:20,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1221 transitions. [2022-11-21 13:49:20,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 174.42857142857142) internal successors, (1221), 7 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:20,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:20,129 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 193.0) internal successors, (1544), 8 states have internal predecessors, (1544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:20,129 INFO L175 Difference]: Start difference. First operand has 181 places, 175 transitions, 398 flow. Second operand 7 states and 1221 transitions. [2022-11-21 13:49:20,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 181 transitions, 459 flow [2022-11-21 13:49:20,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 181 transitions, 447 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:20,142 INFO L231 Difference]: Finished difference. Result has 183 places, 174 transitions, 394 flow [2022-11-21 13:49:20,143 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=183, PETRI_TRANSITIONS=174} [2022-11-21 13:49:20,145 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 5 predicate places. [2022-11-21 13:49:20,145 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 174 transitions, 394 flow [2022-11-21 13:49:20,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 173.33333333333334) internal successors, (1040), 6 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:20,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:20,147 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] [2022-11-21 13:49:20,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:20,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-21 13:49:20,354 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:20,355 INFO L85 PathProgramCache]: Analyzing trace with hash 630994691, now seen corresponding path program 1 times [2022-11-21 13:49:20,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:20,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466960504] [2022-11-21 13:49:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:20,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:20,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:20,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466960504] [2022-11-21 13:49:20,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466960504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:20,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:20,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:49:20,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585179068] [2022-11-21 13:49:20,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:20,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:49:20,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:20,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:49:20,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:49:20,612 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 193 [2022-11-21 13:49:20,614 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 174 transitions, 394 flow. Second operand has 5 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:20,614 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:20,615 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 193 [2022-11-21 13:49:20,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:21,356 INFO L130 PetriNetUnfolder]: 379/2569 cut-off events. [2022-11-21 13:49:21,357 INFO L131 PetriNetUnfolder]: For 218/218 co-relation queries the response was YES. [2022-11-21 13:49:21,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 2569 events. 379/2569 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 21426 event pairs, 140 based on Foata normal form. 0/2260 useless extension candidates. Maximal degree in co-relation 2622. Up to 347 conditions per place. [2022-11-21 13:49:21,378 INFO L137 encePairwiseOnDemand]: 184/193 looper letters, 58 selfloop transitions, 13 changer transitions 1/223 dead transitions. [2022-11-21 13:49:21,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 223 transitions, 644 flow [2022-11-21 13:49:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:49:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 13:49:21,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1373 transitions. [2022-11-21 13:49:21,383 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8892487046632125 [2022-11-21 13:49:21,389 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1373 transitions. [2022-11-21 13:49:21,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1373 transitions. [2022-11-21 13:49:21,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:21,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1373 transitions. [2022-11-21 13:49:21,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 171.625) internal successors, (1373), 8 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:21,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:21,402 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:21,402 INFO L175 Difference]: Start difference. First operand has 183 places, 174 transitions, 394 flow. Second operand 8 states and 1373 transitions. [2022-11-21 13:49:21,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 223 transitions, 644 flow [2022-11-21 13:49:21,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 223 transitions, 633 flow, removed 1 selfloop flow, removed 5 redundant places. [2022-11-21 13:49:21,413 INFO L231 Difference]: Finished difference. Result has 191 places, 185 transitions, 481 flow [2022-11-21 13:49:21,414 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=481, PETRI_PLACES=191, PETRI_TRANSITIONS=185} [2022-11-21 13:49:21,416 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 13 predicate places. [2022-11-21 13:49:21,416 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 185 transitions, 481 flow [2022-11-21 13:49:21,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.2) internal successors, (821), 5 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:21,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:21,417 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] [2022-11-21 13:49:21,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 13:49:21,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:21,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:21,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1220337522, now seen corresponding path program 1 times [2022-11-21 13:49:21,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:21,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230043492] [2022-11-21 13:49:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:21,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230043492] [2022-11-21 13:49:21,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230043492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:21,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:21,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:49:21,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667089459] [2022-11-21 13:49:21,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:49:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:49:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:49:21,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 193 [2022-11-21 13:49:21,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 185 transitions, 481 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:21,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:21,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 193 [2022-11-21 13:49:21,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:22,133 INFO L130 PetriNetUnfolder]: 226/2042 cut-off events. [2022-11-21 13:49:22,134 INFO L131 PetriNetUnfolder]: For 450/538 co-relation queries the response was YES. [2022-11-21 13:49:22,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3117 conditions, 2042 events. 226/2042 cut-off events. For 450/538 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 15492 event pairs, 118 based on Foata normal form. 22/1855 useless extension candidates. Maximal degree in co-relation 2357. Up to 335 conditions per place. [2022-11-21 13:49:22,153 INFO L137 encePairwiseOnDemand]: 187/193 looper letters, 33 selfloop transitions, 6 changer transitions 0/201 dead transitions. [2022-11-21 13:49:22,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 201 transitions, 604 flow [2022-11-21 13:49:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:49:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:49:22,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 869 transitions. [2022-11-21 13:49:22,157 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.900518134715026 [2022-11-21 13:49:22,157 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 869 transitions. [2022-11-21 13:49:22,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 869 transitions. [2022-11-21 13:49:22,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:22,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 869 transitions. [2022-11-21 13:49:22,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,163 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,163 INFO L175 Difference]: Start difference. First operand has 191 places, 185 transitions, 481 flow. Second operand 5 states and 869 transitions. [2022-11-21 13:49:22,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 201 transitions, 604 flow [2022-11-21 13:49:22,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 201 transitions, 604 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 13:49:22,171 INFO L231 Difference]: Finished difference. Result has 198 places, 187 transitions, 515 flow [2022-11-21 13:49:22,172 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=198, PETRI_TRANSITIONS=187} [2022-11-21 13:49:22,173 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 20 predicate places. [2022-11-21 13:49:22,173 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 187 transitions, 515 flow [2022-11-21 13:49:22,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,174 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:22,174 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:22,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 13:49:22,175 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:22,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:22,175 INFO L85 PathProgramCache]: Analyzing trace with hash -6051491, now seen corresponding path program 1 times [2022-11-21 13:49:22,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:22,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341634213] [2022-11-21 13:49:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:22,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:22,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:22,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341634213] [2022-11-21 13:49:22,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341634213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:22,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:22,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:49:22,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808269861] [2022-11-21 13:49:22,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:22,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:49:22,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:22,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:49:22,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:49:22,317 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 193 [2022-11-21 13:49:22,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 187 transitions, 515 flow. Second operand has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:22,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 193 [2022-11-21 13:49:22,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:22,663 INFO L130 PetriNetUnfolder]: 74/1326 cut-off events. [2022-11-21 13:49:22,663 INFO L131 PetriNetUnfolder]: For 207/262 co-relation queries the response was YES. [2022-11-21 13:49:22,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1900 conditions, 1326 events. 74/1326 cut-off events. For 207/262 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 8431 event pairs, 19 based on Foata normal form. 2/1226 useless extension candidates. Maximal degree in co-relation 1485. Up to 102 conditions per place. [2022-11-21 13:49:22,681 INFO L137 encePairwiseOnDemand]: 186/193 looper letters, 19 selfloop transitions, 4 changer transitions 0/196 dead transitions. [2022-11-21 13:49:22,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 196 transitions, 585 flow [2022-11-21 13:49:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:49:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:49:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 881 transitions. [2022-11-21 13:49:22,685 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9129533678756476 [2022-11-21 13:49:22,685 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 881 transitions. [2022-11-21 13:49:22,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 881 transitions. [2022-11-21 13:49:22,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:22,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 881 transitions. [2022-11-21 13:49:22,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,693 INFO L175 Difference]: Start difference. First operand has 198 places, 187 transitions, 515 flow. Second operand 5 states and 881 transitions. [2022-11-21 13:49:22,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 196 transitions, 585 flow [2022-11-21 13:49:22,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 196 transitions, 583 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:49:22,700 INFO L231 Difference]: Finished difference. Result has 204 places, 190 transitions, 545 flow [2022-11-21 13:49:22,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=545, PETRI_PLACES=204, PETRI_TRANSITIONS=190} [2022-11-21 13:49:22,701 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 26 predicate places. [2022-11-21 13:49:22,701 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 190 transitions, 545 flow [2022-11-21 13:49:22,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.5) internal successors, (690), 4 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:22,702 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] [2022-11-21 13:49:22,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 13:49:22,703 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:22,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:22,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1638043772, now seen corresponding path program 1 times [2022-11-21 13:49:22,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:22,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255447813] [2022-11-21 13:49:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:22,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:22,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:22,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255447813] [2022-11-21 13:49:22,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255447813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:22,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:22,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:49:22,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621159316] [2022-11-21 13:49:22,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:22,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:49:22,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:49:22,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:49:22,872 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 193 [2022-11-21 13:49:22,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 190 transitions, 545 flow. Second operand has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:22,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:22,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 193 [2022-11-21 13:49:22,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:23,115 INFO L130 PetriNetUnfolder]: 47/1170 cut-off events. [2022-11-21 13:49:23,115 INFO L131 PetriNetUnfolder]: For 129/129 co-relation queries the response was YES. [2022-11-21 13:49:23,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1556 conditions, 1170 events. 47/1170 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 6448 event pairs, 12 based on Foata normal form. 12/1126 useless extension candidates. Maximal degree in co-relation 1394. Up to 42 conditions per place. [2022-11-21 13:49:23,127 INFO L137 encePairwiseOnDemand]: 189/193 looper letters, 12 selfloop transitions, 4 changer transitions 0/189 dead transitions. [2022-11-21 13:49:23,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 189 transitions, 562 flow [2022-11-21 13:49:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:49:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:49:23,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2022-11-21 13:49:23,130 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.917098445595855 [2022-11-21 13:49:23,130 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2022-11-21 13:49:23,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2022-11-21 13:49:23,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:23,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2022-11-21 13:49:23,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,136 INFO L175 Difference]: Start difference. First operand has 204 places, 190 transitions, 545 flow. Second operand 3 states and 531 transitions. [2022-11-21 13:49:23,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 189 transitions, 562 flow [2022-11-21 13:49:23,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 189 transitions, 554 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-21 13:49:23,143 INFO L231 Difference]: Finished difference. Result has 203 places, 187 transitions, 523 flow [2022-11-21 13:49:23,144 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=523, PETRI_PLACES=203, PETRI_TRANSITIONS=187} [2022-11-21 13:49:23,144 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 25 predicate places. [2022-11-21 13:49:23,145 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 187 transitions, 523 flow [2022-11-21 13:49:23,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.66666666666666) internal successors, (524), 3 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,145 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:23,146 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] [2022-11-21 13:49:23,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 13:49:23,146 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1108562553, now seen corresponding path program 1 times [2022-11-21 13:49:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:23,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478593060] [2022-11-21 13:49:23,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:23,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:23,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:23,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478593060] [2022-11-21 13:49:23,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478593060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:23,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:23,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:49:23,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841036890] [2022-11-21 13:49:23,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:23,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:49:23,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:23,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:49:23,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:49:23,378 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:49:23,380 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 187 transitions, 523 flow. Second operand has 6 states, 6 states have (on average 162.5) internal successors, (975), 6 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,380 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:23,380 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:49:23,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:23,802 INFO L130 PetriNetUnfolder]: 101/1483 cut-off events. [2022-11-21 13:49:23,802 INFO L131 PetriNetUnfolder]: For 189/189 co-relation queries the response was YES. [2022-11-21 13:49:23,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2227 conditions, 1483 events. 101/1483 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 8844 event pairs, 36 based on Foata normal form. 6/1423 useless extension candidates. Maximal degree in co-relation 1372. Up to 143 conditions per place. [2022-11-21 13:49:23,815 INFO L137 encePairwiseOnDemand]: 184/193 looper letters, 51 selfloop transitions, 9 changer transitions 0/217 dead transitions. [2022-11-21 13:49:23,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 217 transitions, 726 flow [2022-11-21 13:49:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:49:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 13:49:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1341 transitions. [2022-11-21 13:49:23,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8685233160621761 [2022-11-21 13:49:23,820 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1341 transitions. [2022-11-21 13:49:23,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1341 transitions. [2022-11-21 13:49:23,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:23,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1341 transitions. [2022-11-21 13:49:23,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.625) internal successors, (1341), 8 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,830 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,830 INFO L175 Difference]: Start difference. First operand has 203 places, 187 transitions, 523 flow. Second operand 8 states and 1341 transitions. [2022-11-21 13:49:23,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 217 transitions, 726 flow [2022-11-21 13:49:23,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 217 transitions, 722 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:49:23,837 INFO L231 Difference]: Finished difference. Result has 212 places, 191 transitions, 570 flow [2022-11-21 13:49:23,838 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=570, PETRI_PLACES=212, PETRI_TRANSITIONS=191} [2022-11-21 13:49:23,839 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 34 predicate places. [2022-11-21 13:49:23,839 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 191 transitions, 570 flow [2022-11-21 13:49:23,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 162.5) internal successors, (975), 6 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:23,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:23,840 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] [2022-11-21 13:49:23,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 13:49:23,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash -6776004, now seen corresponding path program 1 times [2022-11-21 13:49:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:23,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828465465] [2022-11-21 13:49:23,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:23,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:24,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:24,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828465465] [2022-11-21 13:49:24,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828465465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:24,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:24,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-21 13:49:24,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242614240] [2022-11-21 13:49:24,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:24,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:49:24,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:24,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:49:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-21 13:49:24,074 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:49:24,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 191 transitions, 570 flow. Second operand has 6 states, 6 states have (on average 162.66666666666666) internal successors, (976), 6 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:24,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:24,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:49:24,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:24,678 INFO L130 PetriNetUnfolder]: 150/2145 cut-off events. [2022-11-21 13:49:24,678 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2022-11-21 13:49:24,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3315 conditions, 2145 events. 150/2145 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 14314 event pairs, 41 based on Foata normal form. 8/2074 useless extension candidates. Maximal degree in co-relation 2723. Up to 199 conditions per place. [2022-11-21 13:49:24,700 INFO L137 encePairwiseOnDemand]: 183/193 looper letters, 53 selfloop transitions, 14 changer transitions 0/224 dead transitions. [2022-11-21 13:49:24,700 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 224 transitions, 823 flow [2022-11-21 13:49:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:49:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 13:49:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1340 transitions. [2022-11-21 13:49:24,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8678756476683938 [2022-11-21 13:49:24,706 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1340 transitions. [2022-11-21 13:49:24,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1340 transitions. [2022-11-21 13:49:24,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:24,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1340 transitions. [2022-11-21 13:49:24,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 167.5) internal successors, (1340), 8 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:24,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:24,717 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:24,717 INFO L175 Difference]: Start difference. First operand has 212 places, 191 transitions, 570 flow. Second operand 8 states and 1340 transitions. [2022-11-21 13:49:24,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 224 transitions, 823 flow [2022-11-21 13:49:24,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 224 transitions, 815 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:24,726 INFO L231 Difference]: Finished difference. Result has 220 places, 200 transitions, 684 flow [2022-11-21 13:49:24,727 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=684, PETRI_PLACES=220, PETRI_TRANSITIONS=200} [2022-11-21 13:49:24,728 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 42 predicate places. [2022-11-21 13:49:24,728 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 200 transitions, 684 flow [2022-11-21 13:49:24,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 162.66666666666666) internal successors, (976), 6 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:24,730 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:24,730 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:24,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 13:49:24,731 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1641449039, now seen corresponding path program 1 times [2022-11-21 13:49:24,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429735793] [2022-11-21 13:49:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:24,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:24,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:24,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429735793] [2022-11-21 13:49:24,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429735793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:24,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014609931] [2022-11-21 13:49:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:24,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:24,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:24,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:24,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:49:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:25,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:49:25,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:25,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:49:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:25,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014609931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:49:25,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:49:25,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-21 13:49:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097709661] [2022-11-21 13:49:25,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:49:25,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:49:25,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:49:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:49:25,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 193 [2022-11-21 13:49:25,547 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 200 transitions, 684 flow. Second operand has 12 states, 12 states have (on average 169.25) internal successors, (2031), 12 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:25,547 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:25,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 193 [2022-11-21 13:49:25,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:26,542 INFO L130 PetriNetUnfolder]: 170/2997 cut-off events. [2022-11-21 13:49:26,543 INFO L131 PetriNetUnfolder]: For 1042/1048 co-relation queries the response was YES. [2022-11-21 13:49:26,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4690 conditions, 2997 events. 170/2997 cut-off events. For 1042/1048 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 20345 event pairs, 42 based on Foata normal form. 24/2906 useless extension candidates. Maximal degree in co-relation 3905. Up to 117 conditions per place. [2022-11-21 13:49:26,571 INFO L137 encePairwiseOnDemand]: 184/193 looper letters, 65 selfloop transitions, 26 changer transitions 0/259 dead transitions. [2022-11-21 13:49:26,571 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 259 transitions, 1093 flow [2022-11-21 13:49:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 13:49:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 13:49:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3075 transitions. [2022-11-21 13:49:26,579 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.885146804835924 [2022-11-21 13:49:26,579 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3075 transitions. [2022-11-21 13:49:26,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3075 transitions. [2022-11-21 13:49:26,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:26,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3075 transitions. [2022-11-21 13:49:26,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 170.83333333333334) internal successors, (3075), 18 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:26,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 193.0) internal successors, (3667), 19 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:26,598 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 193.0) internal successors, (3667), 19 states have internal predecessors, (3667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:26,599 INFO L175 Difference]: Start difference. First operand has 220 places, 200 transitions, 684 flow. Second operand 18 states and 3075 transitions. [2022-11-21 13:49:26,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 259 transitions, 1093 flow [2022-11-21 13:49:26,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 259 transitions, 1085 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:26,612 INFO L231 Difference]: Finished difference. Result has 238 places, 216 transitions, 854 flow [2022-11-21 13:49:26,613 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=854, PETRI_PLACES=238, PETRI_TRANSITIONS=216} [2022-11-21 13:49:26,615 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 60 predicate places. [2022-11-21 13:49:26,615 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 216 transitions, 854 flow [2022-11-21 13:49:26,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 169.25) internal successors, (2031), 12 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:26,616 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:26,616 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:26,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:26,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 13:49:26,823 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:26,823 INFO L85 PathProgramCache]: Analyzing trace with hash -654686814, now seen corresponding path program 1 times [2022-11-21 13:49:26,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:26,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407955002] [2022-11-21 13:49:26,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:26,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:27,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:27,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407955002] [2022-11-21 13:49:27,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407955002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:27,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269992248] [2022-11-21 13:49:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:27,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:27,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:27,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:27,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:49:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:27,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-21 13:49:27,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:27,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:49:27,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269992248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:27,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:49:27,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-21 13:49:27,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788896991] [2022-11-21 13:49:27,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:27,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-21 13:49:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-21 13:49:27,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-21 13:49:27,366 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 193 [2022-11-21 13:49:27,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 216 transitions, 854 flow. Second operand has 6 states, 6 states have (on average 168.66666666666666) internal successors, (1012), 6 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:27,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:27,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 193 [2022-11-21 13:49:27,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:28,316 INFO L130 PetriNetUnfolder]: 179/3194 cut-off events. [2022-11-21 13:49:28,316 INFO L131 PetriNetUnfolder]: For 1684/1690 co-relation queries the response was YES. [2022-11-21 13:49:28,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5201 conditions, 3194 events. 179/3194 cut-off events. For 1684/1690 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 22013 event pairs, 43 based on Foata normal form. 30/3099 useless extension candidates. Maximal degree in co-relation 4267. Up to 245 conditions per place. [2022-11-21 13:49:28,351 INFO L137 encePairwiseOnDemand]: 185/193 looper letters, 49 selfloop transitions, 19 changer transitions 0/236 dead transitions. [2022-11-21 13:49:28,352 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 236 transitions, 1079 flow [2022-11-21 13:49:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-21 13:49:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-21 13:49:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1375 transitions. [2022-11-21 13:49:28,356 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8905440414507773 [2022-11-21 13:49:28,356 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1375 transitions. [2022-11-21 13:49:28,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1375 transitions. [2022-11-21 13:49:28,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:28,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1375 transitions. [2022-11-21 13:49:28,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 171.875) internal successors, (1375), 8 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:28,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:28,366 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 193.0) internal successors, (1737), 9 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:28,366 INFO L175 Difference]: Start difference. First operand has 238 places, 216 transitions, 854 flow. Second operand 8 states and 1375 transitions. [2022-11-21 13:49:28,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 236 transitions, 1079 flow [2022-11-21 13:49:28,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 236 transitions, 1022 flow, removed 22 selfloop flow, removed 5 redundant places. [2022-11-21 13:49:28,381 INFO L231 Difference]: Finished difference. Result has 240 places, 218 transitions, 899 flow [2022-11-21 13:49:28,382 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=899, PETRI_PLACES=240, PETRI_TRANSITIONS=218} [2022-11-21 13:49:28,382 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 62 predicate places. [2022-11-21 13:49:28,383 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 218 transitions, 899 flow [2022-11-21 13:49:28,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 168.66666666666666) internal successors, (1012), 6 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:28,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:28,384 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:28,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:28,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:28,590 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:28,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:28,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1840412294, now seen corresponding path program 1 times [2022-11-21 13:49:28,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:28,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183394456] [2022-11-21 13:49:28,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:28,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:49:28,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:28,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183394456] [2022-11-21 13:49:28,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183394456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:28,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:49:28,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:49:28,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729331871] [2022-11-21 13:49:28,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:28,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:49:28,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:28,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:49:28,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:49:28,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 193 [2022-11-21 13:49:28,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 218 transitions, 899 flow. Second operand has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:28,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:28,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 193 [2022-11-21 13:49:28,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:29,487 INFO L130 PetriNetUnfolder]: 131/2839 cut-off events. [2022-11-21 13:49:29,488 INFO L131 PetriNetUnfolder]: For 1260/1260 co-relation queries the response was YES. [2022-11-21 13:49:29,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4377 conditions, 2839 events. 131/2839 cut-off events. For 1260/1260 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 17863 event pairs, 29 based on Foata normal form. 16/2746 useless extension candidates. Maximal degree in co-relation 3786. Up to 95 conditions per place. [2022-11-21 13:49:29,524 INFO L137 encePairwiseOnDemand]: 187/193 looper letters, 12 selfloop transitions, 8 changer transitions 0/221 dead transitions. [2022-11-21 13:49:29,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 221 transitions, 949 flow [2022-11-21 13:49:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:49:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-21 13:49:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 873 transitions. [2022-11-21 13:49:29,528 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9046632124352332 [2022-11-21 13:49:29,528 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 873 transitions. [2022-11-21 13:49:29,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 873 transitions. [2022-11-21 13:49:29,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:29,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 873 transitions. [2022-11-21 13:49:29,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 174.6) internal successors, (873), 5 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:29,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:29,533 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 193.0) internal successors, (1158), 6 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:29,534 INFO L175 Difference]: Start difference. First operand has 240 places, 218 transitions, 899 flow. Second operand 5 states and 873 transitions. [2022-11-21 13:49:29,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 221 transitions, 949 flow [2022-11-21 13:49:29,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 221 transitions, 933 flow, removed 4 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:29,549 INFO L231 Difference]: Finished difference. Result has 241 places, 218 transitions, 903 flow [2022-11-21 13:49:29,549 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=903, PETRI_PLACES=241, PETRI_TRANSITIONS=218} [2022-11-21 13:49:29,551 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 63 predicate places. [2022-11-21 13:49:29,552 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 218 transitions, 903 flow [2022-11-21 13:49:29,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:29,552 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:29,553 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 13:49:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 13:49:29,553 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:29,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1218205742, now seen corresponding path program 1 times [2022-11-21 13:49:29,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:29,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234503389] [2022-11-21 13:49:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:29,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:29,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:29,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234503389] [2022-11-21 13:49:29,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234503389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:29,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141377656] [2022-11-21 13:49:29,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:29,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:29,721 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:29,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:49:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:49:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:29,971 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:29,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:49:29,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141377656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:49:29,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:49:29,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-21 13:49:29,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259532696] [2022-11-21 13:49:29,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:49:29,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:49:29,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:29,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:49:29,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-21 13:49:29,975 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 193 [2022-11-21 13:49:29,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 218 transitions, 903 flow. Second operand has 5 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:29,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:29,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 193 [2022-11-21 13:49:29,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:30,772 INFO L130 PetriNetUnfolder]: 126/2973 cut-off events. [2022-11-21 13:49:30,772 INFO L131 PetriNetUnfolder]: For 1344/1344 co-relation queries the response was YES. [2022-11-21 13:49:30,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4707 conditions, 2973 events. 126/2973 cut-off events. For 1344/1344 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 18975 event pairs, 36 based on Foata normal form. 24/2883 useless extension candidates. Maximal degree in co-relation 4131. Up to 140 conditions per place. [2022-11-21 13:49:30,797 INFO L137 encePairwiseOnDemand]: 189/193 looper letters, 13 selfloop transitions, 5 changer transitions 0/219 dead transitions. [2022-11-21 13:49:30,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 219 transitions, 943 flow [2022-11-21 13:49:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:49:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 13:49:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 699 transitions. [2022-11-21 13:49:30,800 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.905440414507772 [2022-11-21 13:49:30,800 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 699 transitions. [2022-11-21 13:49:30,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 699 transitions. [2022-11-21 13:49:30,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:30,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 699 transitions. [2022-11-21 13:49:30,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.75) internal successors, (699), 4 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:30,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:30,805 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:30,805 INFO L175 Difference]: Start difference. First operand has 241 places, 218 transitions, 903 flow. Second operand 4 states and 699 transitions. [2022-11-21 13:49:30,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 219 transitions, 943 flow [2022-11-21 13:49:30,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 219 transitions, 931 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:30,819 INFO L231 Difference]: Finished difference. Result has 240 places, 217 transitions, 897 flow [2022-11-21 13:49:30,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=897, PETRI_PLACES=240, PETRI_TRANSITIONS=217} [2022-11-21 13:49:30,821 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 62 predicate places. [2022-11-21 13:49:30,821 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 217 transitions, 897 flow [2022-11-21 13:49:30,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:30,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:30,822 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:30,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-21 13:49:31,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 13:49:31,028 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:31,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:31,030 INFO L85 PathProgramCache]: Analyzing trace with hash 751115926, now seen corresponding path program 1 times [2022-11-21 13:49:31,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:31,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744520206] [2022-11-21 13:49:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:31,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:31,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:31,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744520206] [2022-11-21 13:49:31,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744520206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:31,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580411911] [2022-11-21 13:49:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:31,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:31,275 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:31,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:49:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:49:31,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:31,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:49:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:32,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580411911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:49:32,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:49:32,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-21 13:49:32,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560797225] [2022-11-21 13:49:32,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:49:32,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 13:49:32,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:32,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 13:49:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:49:32,034 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:49:32,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 217 transitions, 897 flow. Second operand has 16 states, 16 states have (on average 163.5) internal successors, (2616), 16 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:32,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:32,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:49:32,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:33,358 INFO L130 PetriNetUnfolder]: 244/3554 cut-off events. [2022-11-21 13:49:33,359 INFO L131 PetriNetUnfolder]: For 2064/2064 co-relation queries the response was YES. [2022-11-21 13:49:33,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5956 conditions, 3554 events. 244/3554 cut-off events. For 2064/2064 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 26320 event pairs, 62 based on Foata normal form. 38/3454 useless extension candidates. Maximal degree in co-relation 4948. Up to 130 conditions per place. [2022-11-21 13:49:33,388 INFO L137 encePairwiseOnDemand]: 180/193 looper letters, 81 selfloop transitions, 47 changer transitions 0/284 dead transitions. [2022-11-21 13:49:33,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 284 transitions, 1399 flow [2022-11-21 13:49:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 13:49:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-21 13:49:33,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3788 transitions. [2022-11-21 13:49:33,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.853345348051363 [2022-11-21 13:49:33,399 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3788 transitions. [2022-11-21 13:49:33,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3788 transitions. [2022-11-21 13:49:33,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:33,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3788 transitions. [2022-11-21 13:49:33,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 164.69565217391303) internal successors, (3788), 23 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:33,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:33,428 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 193.0) internal successors, (4632), 24 states have internal predecessors, (4632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:33,428 INFO L175 Difference]: Start difference. First operand has 240 places, 217 transitions, 897 flow. Second operand 23 states and 3788 transitions. [2022-11-21 13:49:33,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 284 transitions, 1399 flow [2022-11-21 13:49:33,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 284 transitions, 1389 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:33,447 INFO L231 Difference]: Finished difference. Result has 263 places, 229 transitions, 1097 flow [2022-11-21 13:49:33,448 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1097, PETRI_PLACES=263, PETRI_TRANSITIONS=229} [2022-11-21 13:49:33,449 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 85 predicate places. [2022-11-21 13:49:33,449 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 229 transitions, 1097 flow [2022-11-21 13:49:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 163.5) internal successors, (2616), 16 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:33,451 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:33,451 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:33,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:33,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-21 13:49:33,658 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:33,658 INFO L85 PathProgramCache]: Analyzing trace with hash -763388596, now seen corresponding path program 1 times [2022-11-21 13:49:33,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:33,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838875330] [2022-11-21 13:49:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:33,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:33,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838875330] [2022-11-21 13:49:33,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838875330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:33,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918345512] [2022-11-21 13:49:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:33,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:33,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:33,956 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:33,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:49:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:34,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 13:49:34,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:49:34,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:49:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:49:34,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918345512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:49:34,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:49:34,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-11-21 13:49:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126501741] [2022-11-21 13:49:34,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:49:34,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 13:49:34,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:34,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 13:49:34,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:49:34,680 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:49:34,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 229 transitions, 1097 flow. Second operand has 14 states, 14 states have (on average 164.14285714285714) internal successors, (2298), 14 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:34,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:34,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:49:34,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:36,605 INFO L130 PetriNetUnfolder]: 391/5382 cut-off events. [2022-11-21 13:49:36,605 INFO L131 PetriNetUnfolder]: For 3617/3617 co-relation queries the response was YES. [2022-11-21 13:49:36,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9197 conditions, 5382 events. 391/5382 cut-off events. For 3617/3617 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 42533 event pairs, 58 based on Foata normal form. 53/5233 useless extension candidates. Maximal degree in co-relation 8162. Up to 276 conditions per place. [2022-11-21 13:49:36,649 INFO L137 encePairwiseOnDemand]: 181/193 looper letters, 118 selfloop transitions, 78 changer transitions 0/352 dead transitions. [2022-11-21 13:49:36,649 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 352 transitions, 2347 flow [2022-11-21 13:49:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-21 13:49:36,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-21 13:49:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3965 transitions. [2022-11-21 13:49:36,656 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8560017271157168 [2022-11-21 13:49:36,656 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3965 transitions. [2022-11-21 13:49:36,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3965 transitions. [2022-11-21 13:49:36,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:36,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3965 transitions. [2022-11-21 13:49:36,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 165.20833333333334) internal successors, (3965), 24 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:36,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 193.0) internal successors, (4825), 25 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:36,674 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 193.0) internal successors, (4825), 25 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:36,675 INFO L175 Difference]: Start difference. First operand has 263 places, 229 transitions, 1097 flow. Second operand 24 states and 3965 transitions. [2022-11-21 13:49:36,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 352 transitions, 2347 flow [2022-11-21 13:49:36,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 352 transitions, 2170 flow, removed 78 selfloop flow, removed 5 redundant places. [2022-11-21 13:49:36,699 INFO L231 Difference]: Finished difference. Result has 290 places, 283 transitions, 1833 flow [2022-11-21 13:49:36,700 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1833, PETRI_PLACES=290, PETRI_TRANSITIONS=283} [2022-11-21 13:49:36,701 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 112 predicate places. [2022-11-21 13:49:36,701 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 283 transitions, 1833 flow [2022-11-21 13:49:36,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 164.14285714285714) internal successors, (2298), 14 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:36,702 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:36,702 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-21 13:49:36,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:36,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:36,909 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash -144804814, now seen corresponding path program 2 times [2022-11-21 13:49:36,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:36,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180755436] [2022-11-21 13:49:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:36,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:37,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:37,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180755436] [2022-11-21 13:49:37,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180755436] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:37,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839062146] [2022-11-21 13:49:37,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:49:37,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:37,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:37,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:37,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:49:37,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:49:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:49:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 13:49:37,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:38,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:49:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 0 proven. 402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:38,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839062146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:49:38,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:49:38,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-21 13:49:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755469114] [2022-11-21 13:49:38,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:49:38,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:49:38,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:38,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:49:38,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:49:38,559 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 193 [2022-11-21 13:49:38,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 283 transitions, 1833 flow. Second operand has 24 states, 24 states have (on average 169.625) internal successors, (4071), 24 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:38,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:38,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 193 [2022-11-21 13:49:38,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:41,940 INFO L130 PetriNetUnfolder]: 458/8017 cut-off events. [2022-11-21 13:49:41,941 INFO L131 PetriNetUnfolder]: For 7924/7927 co-relation queries the response was YES. [2022-11-21 13:49:41,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13951 conditions, 8017 events. 458/8017 cut-off events. For 7924/7927 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 59606 event pairs, 128 based on Foata normal form. 48/7740 useless extension candidates. Maximal degree in co-relation 12917. Up to 405 conditions per place. [2022-11-21 13:49:42,005 INFO L137 encePairwiseOnDemand]: 184/193 looper letters, 176 selfloop transitions, 70 changer transitions 0/422 dead transitions. [2022-11-21 13:49:42,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 422 transitions, 3156 flow [2022-11-21 13:49:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 13:49:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-21 13:49:42,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5656 transitions. [2022-11-21 13:49:42,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8880514994504631 [2022-11-21 13:49:42,014 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5656 transitions. [2022-11-21 13:49:42,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5656 transitions. [2022-11-21 13:49:42,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:42,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5656 transitions. [2022-11-21 13:49:42,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 171.3939393939394) internal successors, (5656), 33 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:42,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 193.0) internal successors, (6562), 34 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:42,039 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 193.0) internal successors, (6562), 34 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:42,040 INFO L175 Difference]: Start difference. First operand has 290 places, 283 transitions, 1833 flow. Second operand 33 states and 5656 transitions. [2022-11-21 13:49:42,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 422 transitions, 3156 flow [2022-11-21 13:49:42,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 422 transitions, 3028 flow, removed 60 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:42,090 INFO L231 Difference]: Finished difference. Result has 326 places, 317 transitions, 2349 flow [2022-11-21 13:49:42,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2349, PETRI_PLACES=326, PETRI_TRANSITIONS=317} [2022-11-21 13:49:42,091 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 148 predicate places. [2022-11-21 13:49:42,091 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 317 transitions, 2349 flow [2022-11-21 13:49:42,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 169.625) internal successors, (4071), 24 states have internal predecessors, (4071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:42,093 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:42,093 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:42,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:42,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:42,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1856852446, now seen corresponding path program 1 times [2022-11-21 13:49:42,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:42,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619050344] [2022-11-21 13:49:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 13:49:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:42,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619050344] [2022-11-21 13:49:42,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619050344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:42,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488126793] [2022-11-21 13:49:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:42,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:42,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:42,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:42,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:49:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 13:49:43,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 13:49:43,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:49:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 13:49:43,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488126793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:49:43,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:49:43,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2022-11-21 13:49:43,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564079861] [2022-11-21 13:49:43,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:49:43,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:49:43,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:49:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:49:44,002 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:49:44,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 317 transitions, 2349 flow. Second operand has 18 states, 18 states have (on average 164.11111111111111) internal successors, (2954), 18 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:44,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:44,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:49:44,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:48,689 INFO L130 PetriNetUnfolder]: 897/12187 cut-off events. [2022-11-21 13:49:48,689 INFO L131 PetriNetUnfolder]: For 12075/12075 co-relation queries the response was YES. [2022-11-21 13:49:48,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21931 conditions, 12187 events. 897/12187 cut-off events. For 12075/12075 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 109699 event pairs, 211 based on Foata normal form. 23/11736 useless extension candidates. Maximal degree in co-relation 20744. Up to 553 conditions per place. [2022-11-21 13:49:48,817 INFO L137 encePairwiseOnDemand]: 181/193 looper letters, 190 selfloop transitions, 204 changer transitions 0/550 dead transitions. [2022-11-21 13:49:48,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 550 transitions, 5029 flow [2022-11-21 13:49:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-21 13:49:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-21 13:49:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 6254 transitions. [2022-11-21 13:49:48,834 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8527406599400055 [2022-11-21 13:49:48,834 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 6254 transitions. [2022-11-21 13:49:48,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 6254 transitions. [2022-11-21 13:49:48,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:48,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 6254 transitions. [2022-11-21 13:49:48,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 164.57894736842104) internal successors, (6254), 38 states have internal predecessors, (6254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:48,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 193.0) internal successors, (7527), 39 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:48,864 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 193.0) internal successors, (7527), 39 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:48,864 INFO L175 Difference]: Start difference. First operand has 326 places, 317 transitions, 2349 flow. Second operand 38 states and 6254 transitions. [2022-11-21 13:49:48,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 550 transitions, 5029 flow [2022-11-21 13:49:48,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 550 transitions, 4907 flow, removed 37 selfloop flow, removed 8 redundant places. [2022-11-21 13:49:48,956 INFO L231 Difference]: Finished difference. Result has 365 places, 436 transitions, 4404 flow [2022-11-21 13:49:48,957 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=2251, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4404, PETRI_PLACES=365, PETRI_TRANSITIONS=436} [2022-11-21 13:49:48,957 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 187 predicate places. [2022-11-21 13:49:48,957 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 436 transitions, 4404 flow [2022-11-21 13:49:48,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 164.11111111111111) internal successors, (2954), 18 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:48,959 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:48,959 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:49:48,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:49,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 13:49:49,173 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1023656836, now seen corresponding path program 2 times [2022-11-21 13:49:49,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:49,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954895087] [2022-11-21 13:49:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:49,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:49:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:49,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:49:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954895087] [2022-11-21 13:49:49,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954895087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:49:49,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225665745] [2022-11-21 13:49:49,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:49:49,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:49:49,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:49:49,832 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:49:49,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 13:49:50,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:49:50,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:49:50,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-21 13:49:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:49:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:50,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:49:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:49:51,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225665745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:49:51,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:49:51,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-11-21 13:49:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513448132] [2022-11-21 13:49:51,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:49:51,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-21 13:49:51,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:49:51,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-21 13:49:51,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2022-11-21 13:49:51,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:49:51,277 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 436 transitions, 4404 flow. Second operand has 26 states, 26 states have (on average 164.07692307692307) internal successors, (4266), 26 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:51,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:49:51,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:49:51,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:49:59,127 INFO L130 PetriNetUnfolder]: 1418/18164 cut-off events. [2022-11-21 13:49:59,127 INFO L131 PetriNetUnfolder]: For 22949/22949 co-relation queries the response was YES. [2022-11-21 13:49:59,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33620 conditions, 18164 events. 1418/18164 cut-off events. For 22949/22949 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 184162 event pairs, 195 based on Foata normal form. 90/17575 useless extension candidates. Maximal degree in co-relation 32395. Up to 804 conditions per place. [2022-11-21 13:49:59,361 INFO L137 encePairwiseOnDemand]: 181/193 looper letters, 308 selfloop transitions, 350 changer transitions 0/814 dead transitions. [2022-11-21 13:49:59,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 814 transitions, 9616 flow [2022-11-21 13:49:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-21 13:49:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-21 13:49:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 8409 transitions. [2022-11-21 13:49:59,372 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8543127095397745 [2022-11-21 13:49:59,373 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 8409 transitions. [2022-11-21 13:49:59,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 8409 transitions. [2022-11-21 13:49:59,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:49:59,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 8409 transitions. [2022-11-21 13:49:59,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 164.88235294117646) internal successors, (8409), 51 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:59,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 193.0) internal successors, (10036), 52 states have internal predecessors, (10036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:59,410 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 193.0) internal successors, (10036), 52 states have internal predecessors, (10036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:59,411 INFO L175 Difference]: Start difference. First operand has 365 places, 436 transitions, 4404 flow. Second operand 51 states and 8409 transitions. [2022-11-21 13:49:59,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 814 transitions, 9616 flow [2022-11-21 13:49:59,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 814 transitions, 9382 flow, removed 113 selfloop flow, removed 3 redundant places. [2022-11-21 13:49:59,603 INFO L231 Difference]: Finished difference. Result has 425 places, 622 transitions, 8061 flow [2022-11-21 13:49:59,604 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8061, PETRI_PLACES=425, PETRI_TRANSITIONS=622} [2022-11-21 13:49:59,605 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 247 predicate places. [2022-11-21 13:49:59,605 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 622 transitions, 8061 flow [2022-11-21 13:49:59,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 164.07692307692307) internal successors, (4266), 26 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:49:59,607 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:49:59,607 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-21 13:49:59,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 13:49:59,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 13:49:59,814 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:49:59,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:49:59,815 INFO L85 PathProgramCache]: Analyzing trace with hash -51593382, now seen corresponding path program 1 times [2022-11-21 13:49:59,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:49:59,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289452757] [2022-11-21 13:49:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:49:59,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:49:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-21 13:50:00,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:00,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289452757] [2022-11-21 13:50:00,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289452757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:50:00,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654903043] [2022-11-21 13:50:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:00,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:00,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:00,577 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:50:00,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 13:50:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:00,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:50:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:50:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-21 13:50:01,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:50:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-21 13:50:02,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654903043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:50:02,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:50:02,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 23 [2022-11-21 13:50:02,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40359912] [2022-11-21 13:50:02,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:50:02,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:50:02,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:02,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:50:02,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:50:02,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:50:02,093 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 622 transitions, 8061 flow. Second operand has 24 states, 24 states have (on average 164.5) internal successors, (3948), 24 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:02,093 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:50:02,093 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:50:02,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:50:14,533 INFO L130 PetriNetUnfolder]: 2240/27502 cut-off events. [2022-11-21 13:50:14,534 INFO L131 PetriNetUnfolder]: For 44823/44823 co-relation queries the response was YES. [2022-11-21 13:50:14,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52493 conditions, 27502 events. 2240/27502 cut-off events. For 44823/44823 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 308001 event pairs, 210 based on Foata normal form. 134/26613 useless extension candidates. Maximal degree in co-relation 51600. Up to 1292 conditions per place. [2022-11-21 13:50:14,985 INFO L137 encePairwiseOnDemand]: 181/193 looper letters, 196 selfloop transitions, 719 changer transitions 0/1071 dead transitions. [2022-11-21 13:50:14,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1071 transitions, 16172 flow [2022-11-21 13:50:14,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-21 13:50:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-21 13:50:14,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 6409 transitions. [2022-11-21 13:50:14,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8514680483592401 [2022-11-21 13:50:14,994 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 6409 transitions. [2022-11-21 13:50:14,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 6409 transitions. [2022-11-21 13:50:14,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:50:14,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 6409 transitions. [2022-11-21 13:50:15,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 164.33333333333334) internal successors, (6409), 39 states have internal predecessors, (6409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:15,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 193.0) internal successors, (7720), 40 states have internal predecessors, (7720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:15,021 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 193.0) internal successors, (7720), 40 states have internal predecessors, (7720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:15,021 INFO L175 Difference]: Start difference. First operand has 425 places, 622 transitions, 8061 flow. Second operand 39 states and 6409 transitions. [2022-11-21 13:50:15,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1071 transitions, 16172 flow [2022-11-21 13:50:15,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1071 transitions, 14983 flow, removed 357 selfloop flow, removed 16 redundant places. [2022-11-21 13:50:15,594 INFO L231 Difference]: Finished difference. Result has 444 places, 965 transitions, 14572 flow [2022-11-21 13:50:15,595 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=7102, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14572, PETRI_PLACES=444, PETRI_TRANSITIONS=965} [2022-11-21 13:50:15,595 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 266 predicate places. [2022-11-21 13:50:15,595 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 965 transitions, 14572 flow [2022-11-21 13:50:15,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 164.5) internal successors, (3948), 24 states have internal predecessors, (3948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:15,597 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:50:15,597 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-21 13:50:15,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 13:50:15,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:15,804 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:50:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -105544879, now seen corresponding path program 1 times [2022-11-21 13:50:15,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:15,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778970293] [2022-11-21 13:50:15,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:15,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-21 13:50:16,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778970293] [2022-11-21 13:50:16,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778970293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:50:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45836655] [2022-11-21 13:50:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:16,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:16,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:16,376 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:50:16,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 13:50:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:16,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:50:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:50:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-21 13:50:17,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:50:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-21 13:50:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45836655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:50:17,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:50:17,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-21 13:50:17,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683212078] [2022-11-21 13:50:17,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:50:17,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 13:50:17,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:17,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 13:50:17,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2022-11-21 13:50:17,684 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:50:17,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 965 transitions, 14572 flow. Second operand has 22 states, 22 states have (on average 164.45454545454547) internal successors, (3618), 22 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:17,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:50:17,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:50:17,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:50:37,392 INFO L130 PetriNetUnfolder]: 3411/40515 cut-off events. [2022-11-21 13:50:37,392 INFO L131 PetriNetUnfolder]: For 72495/72495 co-relation queries the response was YES. [2022-11-21 13:50:38,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79464 conditions, 40515 events. 3411/40515 cut-off events. For 72495/72495 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 493526 event pairs, 890 based on Foata normal form. 179/39156 useless extension candidates. Maximal degree in co-relation 78190. Up to 2104 conditions per place. [2022-11-21 13:50:38,081 INFO L137 encePairwiseOnDemand]: 182/193 looper letters, 245 selfloop transitions, 1190 changer transitions 0/1591 dead transitions. [2022-11-21 13:50:38,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1591 transitions, 26472 flow [2022-11-21 13:50:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-21 13:50:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-21 13:50:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 5448 transitions. [2022-11-21 13:50:38,088 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8553933113518606 [2022-11-21 13:50:38,088 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 5448 transitions. [2022-11-21 13:50:38,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 5448 transitions. [2022-11-21 13:50:38,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:50:38,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 5448 transitions. [2022-11-21 13:50:38,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 165.0909090909091) internal successors, (5448), 33 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:38,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 193.0) internal successors, (6562), 34 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:38,105 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 193.0) internal successors, (6562), 34 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:38,105 INFO L175 Difference]: Start difference. First operand has 444 places, 965 transitions, 14572 flow. Second operand 33 states and 5448 transitions. [2022-11-21 13:50:38,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1591 transitions, 26472 flow [2022-11-21 13:50:38,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 1591 transitions, 25594 flow, removed 408 selfloop flow, removed 5 redundant places. [2022-11-21 13:50:38,850 INFO L231 Difference]: Finished difference. Result has 468 places, 1452 transitions, 25185 flow [2022-11-21 13:50:38,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=13639, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=940, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=710, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=25185, PETRI_PLACES=468, PETRI_TRANSITIONS=1452} [2022-11-21 13:50:38,852 INFO L288 CegarLoopForPetriNet]: 178 programPoint places, 290 predicate places. [2022-11-21 13:50:38,852 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 1452 transitions, 25185 flow [2022-11-21 13:50:38,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 164.45454545454547) internal successors, (3618), 22 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:38,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:50:38,853 INFO L209 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:50:38,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 13:50:39,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:39,060 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2022-11-21 13:50:39,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:50:39,060 INFO L85 PathProgramCache]: Analyzing trace with hash -871576844, now seen corresponding path program 2 times [2022-11-21 13:50:39,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:50:39,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561669520] [2022-11-21 13:50:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:50:39,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:50:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:50:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-21 13:50:40,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:50:40,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561669520] [2022-11-21 13:50:40,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561669520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:50:40,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422879741] [2022-11-21 13:50:40,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:50:40,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:50:40,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:50:40,015 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:50:40,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_646937ff-6144-4fd4-b0c5-0f036c079cda/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 13:50:40,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:50:40,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:50:40,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 13:50:40,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:50:40,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1155 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 13:50:40,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:50:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 0 proven. 1155 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-21 13:50:41,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422879741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:50:41,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:50:41,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 33 [2022-11-21 13:50:41,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548418208] [2022-11-21 13:50:41,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:50:41,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 13:50:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:50:41,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 13:50:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 13:50:41,697 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 193 [2022-11-21 13:50:41,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 1452 transitions, 25185 flow. Second operand has 34 states, 34 states have (on average 164.05882352941177) internal successors, (5578), 34 states have internal predecessors, (5578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:50:41,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:50:41,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 193 [2022-11-21 13:50:41,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand