./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- 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-8393723 [2022-11-18 19:44:48,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:44:48,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:44:48,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:44:48,519 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:44:48,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:44:48,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:44:48,523 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:44:48,525 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:44:48,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:44:48,527 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:44:48,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:44:48,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:44:48,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:44:48,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:44:48,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:44:48,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:44:48,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:44:48,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:44:48,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:44:48,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:44:48,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:44:48,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:44:48,543 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:44:48,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:44:48,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:44:48,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:44:48,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:44:48,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:44:48,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:44:48,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:44:48,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:44:48,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:44:48,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:44:48,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:44:48,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:44:48,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:44:48,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:44:48,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:44:48,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:44:48,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:44:48,567 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:44:48,604 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:44:48,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:44:48,605 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:44:48,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:44:48,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:44:48,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:44:48,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:44:48,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:44:48,609 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:44:48,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:44:48,610 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:44:48,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:44:48,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:44:48,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:44:48,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:44:48,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:44:48,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:44:48,611 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:44:48,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:44:48,612 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:44:48,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:44:48,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:44:48,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:44:48,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:44:48,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:44:48,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:44:48,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:44:48,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:44:48,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:44:48,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:44:48,616 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:44:48,616 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:44:48,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:44:48,616 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_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2022-11-18 19:44:48,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:44:48,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:44:48,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:44:48,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:44:48,910 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:44:48,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-18 19:44:48,975 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/data/70310462b/113c48dd6cb5474488116a91ffa2bf8e/FLAGdedf0c64f [2022-11-18 19:44:49,504 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:44:49,505 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-18 19:44:49,520 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/data/70310462b/113c48dd6cb5474488116a91ffa2bf8e/FLAGdedf0c64f [2022-11-18 19:44:49,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/data/70310462b/113c48dd6cb5474488116a91ffa2bf8e [2022-11-18 19:44:49,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:44:49,814 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:44:49,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:44:49,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:44:49,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:44:49,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:44:49" (1/1) ... [2022-11-18 19:44:49,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb30dc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:49, skipping insertion in model container [2022-11-18 19:44:49,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:44:49" (1/1) ... [2022-11-18 19:44:49,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:44:49,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:44:50,418 WARN L234 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_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-18 19:44:50,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:44:50,457 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:44:50,505 WARN L234 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_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-18 19:44:50,526 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:44:50,601 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:44:50,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50 WrapperNode [2022-11-18 19:44:50,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:44:50,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:44:50,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:44:50,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:44:50,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,685 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-18 19:44:50,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:44:50,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:44:50,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:44:50,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:44:50,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,743 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:44:50,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:44:50,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:44:50,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:44:50,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (1/1) ... [2022-11-18 19:44:50,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:44:50,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:50,799 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:44:50,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:44:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 19:44:50,847 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 19:44:50,847 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 19:44:50,848 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 19:44:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:44:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:44:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:44:50,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:44:50,849 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 19:44:50,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:44:50,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:44:50,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:44:50,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:44:50,851 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:44:51,064 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:44:51,066 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:44:51,382 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:44:51,391 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:44:51,391 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 19:44:51,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:44:51 BoogieIcfgContainer [2022-11-18 19:44:51,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:44:51,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:44:51,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:44:51,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:44:51,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:44:49" (1/3) ... [2022-11-18 19:44:51,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf6d90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:44:51, skipping insertion in model container [2022-11-18 19:44:51,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:44:50" (2/3) ... [2022-11-18 19:44:51,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf6d90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:44:51, skipping insertion in model container [2022-11-18 19:44:51,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:44:51" (3/3) ... [2022-11-18 19:44:51,404 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2022-11-18 19:44:51,413 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:44:51,424 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:44:51,424 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 19:44:51,424 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:44:51,538 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:44:51,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2022-11-18 19:44:51,678 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2022-11-18 19:44:51,679 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 19:44:51,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 411 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-18 19:44:51,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2022-11-18 19:44:51,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2022-11-18 19:44:51,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:44:51,739 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;@8e5f50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:44:51,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 19:44:51,779 INFO L130 PetriNetUnfolder]: 5/127 cut-off events. [2022-11-18 19:44:51,779 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:44:51,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:44:51,780 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] [2022-11-18 19:44:51,781 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:44:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:51,786 INFO L85 PathProgramCache]: Analyzing trace with hash -97581397, now seen corresponding path program 1 times [2022-11-18 19:44:51,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:51,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513514661] [2022-11-18 19:44:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:51,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:52,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:52,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513514661] [2022-11-18 19:44:52,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513514661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:52,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:44:52,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:44:52,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50603952] [2022-11-18 19:44:52,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:52,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:44:52,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:44:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:44:52,277 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-18 19:44:52,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 158 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:52,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:44:52,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-18 19:44:52,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:44:52,533 INFO L130 PetriNetUnfolder]: 88/697 cut-off events. [2022-11-18 19:44:52,534 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-18 19:44:52,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 697 events. 88/697 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3094 event pairs, 32 based on Foata normal form. 69/700 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-18 19:44:52,543 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 20 selfloop transitions, 3 changer transitions 0/156 dead transitions. [2022-11-18 19:44:52,543 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 156 transitions, 373 flow [2022-11-18 19:44:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:44:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:44:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-11-18 19:44:52,558 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9274509803921569 [2022-11-18 19:44:52,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-11-18 19:44:52,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-11-18 19:44:52,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:44:52,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-11-18 19:44:52,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:52,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:52,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:52,576 INFO L175 Difference]: Start difference. First operand has 155 places, 158 transitions, 325 flow. Second operand 3 states and 473 transitions. [2022-11-18 19:44:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 156 transitions, 373 flow [2022-11-18 19:44:52,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 156 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 19:44:52,584 INFO L231 Difference]: Finished difference. Result has 151 places, 150 transitions, 319 flow [2022-11-18 19:44:52,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=151, PETRI_TRANSITIONS=150} [2022-11-18 19:44:52,590 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -4 predicate places. [2022-11-18 19:44:52,590 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 150 transitions, 319 flow [2022-11-18 19:44:52,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:52,591 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:44:52,591 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] [2022-11-18 19:44:52,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:44:52,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:44:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:52,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1849244650, now seen corresponding path program 1 times [2022-11-18 19:44:52,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:52,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972347689] [2022-11-18 19:44:52,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:52,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:52,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:52,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972347689] [2022-11-18 19:44:52,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972347689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:52,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:44:52,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 19:44:52,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484658588] [2022-11-18 19:44:52,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:52,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:44:52,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:52,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:44:52,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:44:52,836 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 170 [2022-11-18 19:44:52,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 150 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:52,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:44:52,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 170 [2022-11-18 19:44:52,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:44:53,018 INFO L130 PetriNetUnfolder]: 34/588 cut-off events. [2022-11-18 19:44:53,018 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-18 19:44:53,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 588 events. 34/588 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2043 event pairs, 11 based on Foata normal form. 0/551 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-18 19:44:53,025 INFO L137 encePairwiseOnDemand]: 165/170 looper letters, 16 selfloop transitions, 4 changer transitions 0/158 dead transitions. [2022-11-18 19:44:53,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 158 transitions, 380 flow [2022-11-18 19:44:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:44:53,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:44:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2022-11-18 19:44:53,032 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.913235294117647 [2022-11-18 19:44:53,032 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2022-11-18 19:44:53,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2022-11-18 19:44:53,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:44:53,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2022-11-18 19:44:53,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,040 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,040 INFO L175 Difference]: Start difference. First operand has 151 places, 150 transitions, 319 flow. Second operand 4 states and 621 transitions. [2022-11-18 19:44:53,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 158 transitions, 380 flow [2022-11-18 19:44:53,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 158 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:44:53,047 INFO L231 Difference]: Finished difference. Result has 155 places, 153 transitions, 344 flow [2022-11-18 19:44:53,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=155, PETRI_TRANSITIONS=153} [2022-11-18 19:44:53,048 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-18 19:44:53,049 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 153 transitions, 344 flow [2022-11-18 19:44:53,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,049 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:44:53,050 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] [2022-11-18 19:44:53,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:44:53,051 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:44:53,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:53,051 INFO L85 PathProgramCache]: Analyzing trace with hash -228812281, now seen corresponding path program 1 times [2022-11-18 19:44:53,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:53,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321912866] [2022-11-18 19:44:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:53,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:53,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:53,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321912866] [2022-11-18 19:44:53,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321912866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:53,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:44:53,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:44:53,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832443474] [2022-11-18 19:44:53,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:53,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:44:53,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:44:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:44:53,220 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-18 19:44:53,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 153 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:44:53,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-18 19:44:53,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:44:53,520 INFO L130 PetriNetUnfolder]: 127/1265 cut-off events. [2022-11-18 19:44:53,521 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-18 19:44:53,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670 conditions, 1265 events. 127/1265 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6972 event pairs, 33 based on Foata normal form. 12/1203 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-18 19:44:53,533 INFO L137 encePairwiseOnDemand]: 164/170 looper letters, 25 selfloop transitions, 4 changer transitions 0/165 dead transitions. [2022-11-18 19:44:53,533 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 165 transitions, 435 flow [2022-11-18 19:44:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:44:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:44:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-11-18 19:44:53,539 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9176470588235294 [2022-11-18 19:44:53,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-11-18 19:44:53,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-11-18 19:44:53,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:44:53,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-11-18 19:44:53,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,543 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,543 INFO L175 Difference]: Start difference. First operand has 155 places, 153 transitions, 344 flow. Second operand 3 states and 468 transitions. [2022-11-18 19:44:53,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 165 transitions, 435 flow [2022-11-18 19:44:53,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 165 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:44:53,550 INFO L231 Difference]: Finished difference. Result has 158 places, 157 transitions, 384 flow [2022-11-18 19:44:53,550 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=158, PETRI_TRANSITIONS=157} [2022-11-18 19:44:53,553 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 3 predicate places. [2022-11-18 19:44:53,553 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 157 transitions, 384 flow [2022-11-18 19:44:53,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:53,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:44:53,554 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:53,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:44:53,555 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:44:53,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:53,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1181773498, now seen corresponding path program 1 times [2022-11-18 19:44:53,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:53,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806906760] [2022-11-18 19:44:53,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:53,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:53,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:53,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806906760] [2022-11-18 19:44:53,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806906760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:44:53,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060639992] [2022-11-18 19:44:53,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:53,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:53,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:44:53,818 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:44:53,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:44:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:53,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:44:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:44:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:54,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:44:54,338 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:54,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060639992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:44:54,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:44:54,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:44:54,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909410495] [2022-11-18 19:44:54,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:44:54,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:44:54,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:54,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:44:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:44:54,346 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 170 [2022-11-18 19:44:54,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 157 transitions, 384 flow. Second operand has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:54,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:44:54,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 170 [2022-11-18 19:44:54,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:44:55,018 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([460] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][178], [26#L1022-4true, 33#L1010true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, 85#L945-2true, Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 190#true, 186#(<= 1 ~top~0), Black: 184#true, Black: 172#(= ~top~0 0)]) [2022-11-18 19:44:55,019 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-18 19:44:55,020 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-18 19:44:55,044 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-18 19:44:55,044 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-18 19:44:55,044 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([461] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][179], [154#L1008-1true, 26#L1022-4true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, 85#L945-2true, 255#(<= ~top~0 0), Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 184#true, Black: 186#(<= 1 ~top~0), Black: 172#(= ~top~0 0)]) [2022-11-18 19:44:55,044 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-18 19:44:55,045 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-18 19:44:55,045 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-18 19:44:55,045 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-18 19:44:55,169 INFO L130 PetriNetUnfolder]: 387/2731 cut-off events. [2022-11-18 19:44:55,169 INFO L131 PetriNetUnfolder]: For 972/1058 co-relation queries the response was YES. [2022-11-18 19:44:55,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 2731 events. 387/2731 cut-off events. For 972/1058 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 19272 event pairs, 64 based on Foata normal form. 38/2620 useless extension candidates. Maximal degree in co-relation 3635. Up to 300 conditions per place. [2022-11-18 19:44:55,191 INFO L137 encePairwiseOnDemand]: 161/170 looper letters, 86 selfloop transitions, 46 changer transitions 1/267 dead transitions. [2022-11-18 19:44:55,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 1066 flow [2022-11-18 19:44:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 19:44:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 19:44:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2723 transitions. [2022-11-18 19:44:55,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8898692810457516 [2022-11-18 19:44:55,199 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2723 transitions. [2022-11-18 19:44:55,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2723 transitions. [2022-11-18 19:44:55,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:44:55,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2723 transitions. [2022-11-18 19:44:55,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 151.27777777777777) internal successors, (2723), 18 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,218 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,218 INFO L175 Difference]: Start difference. First operand has 158 places, 157 transitions, 384 flow. Second operand 18 states and 2723 transitions. [2022-11-18 19:44:55,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 1066 flow [2022-11-18 19:44:55,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 267 transitions, 1004 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-18 19:44:55,228 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 755 flow [2022-11-18 19:44:55,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=755, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2022-11-18 19:44:55,229 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 24 predicate places. [2022-11-18 19:44:55,229 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 755 flow [2022-11-18 19:44:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:44:55,230 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] [2022-11-18 19:44:55,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:44:55,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:44:55,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:44:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:55,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1205336634, now seen corresponding path program 1 times [2022-11-18 19:44:55,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:55,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199930470] [2022-11-18 19:44:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:55,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:55,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:55,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199930470] [2022-11-18 19:44:55,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199930470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:55,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:44:55,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:44:55,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073335605] [2022-11-18 19:44:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:55,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:44:55,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:55,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:44:55,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:44:55,659 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 170 [2022-11-18 19:44:55,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 755 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:44:55,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 170 [2022-11-18 19:44:55,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:44:55,939 INFO L130 PetriNetUnfolder]: 54/1105 cut-off events. [2022-11-18 19:44:55,939 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-18 19:44:55,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1105 events. 54/1105 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4844 event pairs, 9 based on Foata normal form. 18/1080 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-11-18 19:44:55,946 INFO L137 encePairwiseOnDemand]: 166/170 looper letters, 12 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-11-18 19:44:55,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 171 transitions, 532 flow [2022-11-18 19:44:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:44:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:44:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2022-11-18 19:44:55,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9058823529411765 [2022-11-18 19:44:55,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2022-11-18 19:44:55,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2022-11-18 19:44:55,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:44:55,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2022-11-18 19:44:55,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,952 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 755 flow. Second operand 3 states and 462 transitions. [2022-11-18 19:44:55,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 171 transitions, 532 flow [2022-11-18 19:44:55,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 171 transitions, 510 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-18 19:44:55,959 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 479 flow [2022-11-18 19:44:55,959 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2022-11-18 19:44:55,962 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 14 predicate places. [2022-11-18 19:44:55,962 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 479 flow [2022-11-18 19:44:55,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:55,963 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:44:55,963 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:44:55,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:44:55,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:44:55,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:44:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1077512720, now seen corresponding path program 1 times [2022-11-18 19:44:55,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:44:55,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171358710] [2022-11-18 19:44:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:44:55,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:44:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:44:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:44:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:44:58,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171358710] [2022-11-18 19:44:58,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171358710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:44:58,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:44:58,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-18 19:44:58,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575185535] [2022-11-18 19:44:58,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:44:58,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 19:44:58,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:44:58,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 19:44:58,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-11-18 19:44:58,013 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-18 19:44:58,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 479 flow. Second operand has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:44:58,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:44:58,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-18 19:44:58,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:45:01,345 INFO L130 PetriNetUnfolder]: 1109/4445 cut-off events. [2022-11-18 19:45:01,345 INFO L131 PetriNetUnfolder]: For 787/787 co-relation queries the response was YES. [2022-11-18 19:45:01,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8358 conditions, 4445 events. 1109/4445 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 33056 event pairs, 157 based on Foata normal form. 0/4293 useless extension candidates. Maximal degree in co-relation 4747. Up to 1370 conditions per place. [2022-11-18 19:45:01,376 INFO L137 encePairwiseOnDemand]: 136/170 looper letters, 293 selfloop transitions, 51 changer transitions 11/439 dead transitions. [2022-11-18 19:45:01,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 439 transitions, 1915 flow [2022-11-18 19:45:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 19:45:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-18 19:45:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3554 transitions. [2022-11-18 19:45:01,385 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.614878892733564 [2022-11-18 19:45:01,385 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3554 transitions. [2022-11-18 19:45:01,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3554 transitions. [2022-11-18 19:45:01,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:45:01,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3554 transitions. [2022-11-18 19:45:01,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 104.52941176470588) internal successors, (3554), 34 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:01,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 170.0) internal successors, (5950), 35 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:01,413 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 170.0) internal successors, (5950), 35 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:01,413 INFO L175 Difference]: Start difference. First operand has 169 places, 169 transitions, 479 flow. Second operand 34 states and 3554 transitions. [2022-11-18 19:45:01,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 439 transitions, 1915 flow [2022-11-18 19:45:01,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 439 transitions, 1911 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:45:01,424 INFO L231 Difference]: Finished difference. Result has 228 places, 215 transitions, 861 flow [2022-11-18 19:45:01,425 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=861, PETRI_PLACES=228, PETRI_TRANSITIONS=215} [2022-11-18 19:45:01,428 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 73 predicate places. [2022-11-18 19:45:01,428 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 215 transitions, 861 flow [2022-11-18 19:45:01,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:01,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:45:01,436 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:01,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:45:01,436 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:45:01,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:01,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1423261228, now seen corresponding path program 2 times [2022-11-18 19:45:01,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:01,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215821356] [2022-11-18 19:45:01,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:01,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:03,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:03,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215821356] [2022-11-18 19:45:03,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215821356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:45:03,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:45:03,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-18 19:45:03,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171370272] [2022-11-18 19:45:03,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:45:03,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 19:45:03,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:03,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 19:45:03,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2022-11-18 19:45:03,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-18 19:45:03,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 215 transitions, 861 flow. Second operand has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:03,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:45:03,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-18 19:45:03,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:45:08,243 INFO L130 PetriNetUnfolder]: 1483/6021 cut-off events. [2022-11-18 19:45:08,243 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2022-11-18 19:45:08,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13124 conditions, 6021 events. 1483/6021 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 48920 event pairs, 283 based on Foata normal form. 4/5911 useless extension candidates. Maximal degree in co-relation 7912. Up to 1396 conditions per place. [2022-11-18 19:45:08,316 INFO L137 encePairwiseOnDemand]: 133/170 looper letters, 301 selfloop transitions, 78 changer transitions 11/466 dead transitions. [2022-11-18 19:45:08,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 466 transitions, 2584 flow [2022-11-18 19:45:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 19:45:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 19:45:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3399 transitions. [2022-11-18 19:45:08,327 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5403815580286169 [2022-11-18 19:45:08,327 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3399 transitions. [2022-11-18 19:45:08,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3399 transitions. [2022-11-18 19:45:08,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:45:08,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3399 transitions. [2022-11-18 19:45:08,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 91.86486486486487) internal successors, (3399), 37 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:08,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 170.0) internal successors, (6460), 38 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:08,352 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 170.0) internal successors, (6460), 38 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:08,352 INFO L175 Difference]: Start difference. First operand has 228 places, 215 transitions, 861 flow. Second operand 37 states and 3399 transitions. [2022-11-18 19:45:08,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 466 transitions, 2584 flow [2022-11-18 19:45:08,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 466 transitions, 2581 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 19:45:08,375 INFO L231 Difference]: Finished difference. Result has 277 places, 242 transitions, 1291 flow [2022-11-18 19:45:08,375 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1291, PETRI_PLACES=277, PETRI_TRANSITIONS=242} [2022-11-18 19:45:08,376 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 122 predicate places. [2022-11-18 19:45:08,376 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 242 transitions, 1291 flow [2022-11-18 19:45:08,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:08,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:45:08,378 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:08,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:45:08,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:45:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:08,379 INFO L85 PathProgramCache]: Analyzing trace with hash -820719294, now seen corresponding path program 3 times [2022-11-18 19:45:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:08,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477519057] [2022-11-18 19:45:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:08,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:10,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:10,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477519057] [2022-11-18 19:45:10,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477519057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:45:10,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:45:10,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-18 19:45:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193366934] [2022-11-18 19:45:10,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:45:10,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 19:45:10,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:10,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 19:45:10,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-11-18 19:45:10,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 170 [2022-11-18 19:45:10,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 242 transitions, 1291 flow. Second operand has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:10,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:45:10,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 170 [2022-11-18 19:45:10,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:45:16,054 INFO L130 PetriNetUnfolder]: 1792/7592 cut-off events. [2022-11-18 19:45:16,054 INFO L131 PetriNetUnfolder]: For 5825/5827 co-relation queries the response was YES. [2022-11-18 19:45:16,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17320 conditions, 7592 events. 1792/7592 cut-off events. For 5825/5827 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 65976 event pairs, 305 based on Foata normal form. 8/7447 useless extension candidates. Maximal degree in co-relation 9470. Up to 1271 conditions per place. [2022-11-18 19:45:16,146 INFO L137 encePairwiseOnDemand]: 145/170 looper letters, 247 selfloop transitions, 56 changer transitions 14/405 dead transitions. [2022-11-18 19:45:16,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 405 transitions, 2688 flow [2022-11-18 19:45:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 19:45:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 19:45:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2338 transitions. [2022-11-18 19:45:16,161 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5730392156862745 [2022-11-18 19:45:16,161 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2338 transitions. [2022-11-18 19:45:16,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2338 transitions. [2022-11-18 19:45:16,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:45:16,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2338 transitions. [2022-11-18 19:45:16,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 97.41666666666667) internal successors, (2338), 24 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:16,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 170.0) internal successors, (4250), 25 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:16,200 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 170.0) internal successors, (4250), 25 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:16,200 INFO L175 Difference]: Start difference. First operand has 277 places, 242 transitions, 1291 flow. Second operand 24 states and 2338 transitions. [2022-11-18 19:45:16,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 405 transitions, 2688 flow [2022-11-18 19:45:16,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 405 transitions, 2607 flow, removed 27 selfloop flow, removed 13 redundant places. [2022-11-18 19:45:16,243 INFO L231 Difference]: Finished difference. Result has 295 places, 256 transitions, 1535 flow [2022-11-18 19:45:16,244 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1535, PETRI_PLACES=295, PETRI_TRANSITIONS=256} [2022-11-18 19:45:16,246 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 140 predicate places. [2022-11-18 19:45:16,246 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 256 transitions, 1535 flow [2022-11-18 19:45:16,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:16,248 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:45:16,249 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:16,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:45:16,249 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:45:16,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:16,250 INFO L85 PathProgramCache]: Analyzing trace with hash -179739788, now seen corresponding path program 1 times [2022-11-18 19:45:16,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:16,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371955783] [2022-11-18 19:45:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:16,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:16,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:16,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371955783] [2022-11-18 19:45:16,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371955783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:16,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315297036] [2022-11-18 19:45:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:16,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:16,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:16,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:16,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:45:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:16,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 19:45:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 19:45:16,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:45:16,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315297036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:45:16,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:45:16,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-11-18 19:45:16,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296865920] [2022-11-18 19:45:16,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:45:16,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 19:45:16,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 19:45:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 19:45:16,887 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-18 19:45:16,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 256 transitions, 1535 flow. Second operand has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 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) [2022-11-18 19:45:16,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:45:16,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-18 19:45:16,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:45:18,024 INFO L130 PetriNetUnfolder]: 248/3339 cut-off events. [2022-11-18 19:45:18,024 INFO L131 PetriNetUnfolder]: For 3017/3018 co-relation queries the response was YES. [2022-11-18 19:45:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6759 conditions, 3339 events. 248/3339 cut-off events. For 3017/3018 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 24253 event pairs, 65 based on Foata normal form. 12/3280 useless extension candidates. Maximal degree in co-relation 4883. Up to 261 conditions per place. [2022-11-18 19:45:18,057 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 52 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2022-11-18 19:45:18,058 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 280 transitions, 1797 flow [2022-11-18 19:45:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 19:45:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 19:45:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1186 transitions. [2022-11-18 19:45:18,060 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8720588235294118 [2022-11-18 19:45:18,060 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1186 transitions. [2022-11-18 19:45:18,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1186 transitions. [2022-11-18 19:45:18,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:45:18,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1186 transitions. [2022-11-18 19:45:18,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 148.25) internal successors, (1186), 8 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:18,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:18,066 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:18,067 INFO L175 Difference]: Start difference. First operand has 295 places, 256 transitions, 1535 flow. Second operand 8 states and 1186 transitions. [2022-11-18 19:45:18,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 280 transitions, 1797 flow [2022-11-18 19:45:18,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 280 transitions, 1716 flow, removed 22 selfloop flow, removed 15 redundant places. [2022-11-18 19:45:18,094 INFO L231 Difference]: Finished difference. Result has 292 places, 261 transitions, 1631 flow [2022-11-18 19:45:18,095 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1631, PETRI_PLACES=292, PETRI_TRANSITIONS=261} [2022-11-18 19:45:18,095 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 137 predicate places. [2022-11-18 19:45:18,096 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 261 transitions, 1631 flow [2022-11-18 19:45:18,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 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) [2022-11-18 19:45:18,096 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:45:18,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:18,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 19:45:18,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 19:45:18,303 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:45:18,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1352216211, now seen corresponding path program 1 times [2022-11-18 19:45:18,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:18,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173813967] [2022-11-18 19:45:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:18,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:45:19,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173813967] [2022-11-18 19:45:19,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173813967] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575145867] [2022-11-18 19:45:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:19,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:19,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:19,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:19,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:45:20,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 19:45:20,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:21,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 19:45:23,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-18 19:45:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:45:23,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:24,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-18 19:45:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:45:25,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575145867] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:25,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 19:45:25,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [23, 26] total 66 [2022-11-18 19:45:25,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456470533] [2022-11-18 19:45:25,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:45:25,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 19:45:25,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:25,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 19:45:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=4036, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 19:45:25,327 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-18 19:45:25,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 261 transitions, 1631 flow. Second operand has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:25,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:45:25,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-18 19:45:25,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:45:35,290 INFO L130 PetriNetUnfolder]: 2639/10767 cut-off events. [2022-11-18 19:45:35,291 INFO L131 PetriNetUnfolder]: For 10512/10515 co-relation queries the response was YES. [2022-11-18 19:45:35,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25104 conditions, 10767 events. 2639/10767 cut-off events. For 10512/10515 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 98990 event pairs, 407 based on Foata normal form. 13/10554 useless extension candidates. Maximal degree in co-relation 22611. Up to 1446 conditions per place. [2022-11-18 19:45:35,442 INFO L137 encePairwiseOnDemand]: 134/170 looper letters, 287 selfloop transitions, 196 changer transitions 3/570 dead transitions. [2022-11-18 19:45:35,442 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 570 transitions, 4145 flow [2022-11-18 19:45:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-18 19:45:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-11-18 19:45:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 6690 transitions. [2022-11-18 19:45:35,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5873573309920983 [2022-11-18 19:45:35,647 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 6690 transitions. [2022-11-18 19:45:35,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 6690 transitions. [2022-11-18 19:45:35,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:45:35,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 6690 transitions. [2022-11-18 19:45:35,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 99.85074626865672) internal successors, (6690), 67 states have internal predecessors, (6690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:35,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 170.0) internal successors, (11560), 68 states have internal predecessors, (11560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:35,696 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 170.0) internal successors, (11560), 68 states have internal predecessors, (11560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:35,697 INFO L175 Difference]: Start difference. First operand has 292 places, 261 transitions, 1631 flow. Second operand 67 states and 6690 transitions. [2022-11-18 19:45:35,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 570 transitions, 4145 flow [2022-11-18 19:45:35,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 570 transitions, 4085 flow, removed 30 selfloop flow, removed 0 redundant places. [2022-11-18 19:45:35,757 INFO L231 Difference]: Finished difference. Result has 375 places, 389 transitions, 3063 flow [2022-11-18 19:45:35,759 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=3063, PETRI_PLACES=375, PETRI_TRANSITIONS=389} [2022-11-18 19:45:35,759 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 220 predicate places. [2022-11-18 19:45:35,760 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 389 transitions, 3063 flow [2022-11-18 19:45:35,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:35,761 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:45:35,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:45:35,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:45:35,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:35,967 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:45:35,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:45:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1453242275, now seen corresponding path program 2 times [2022-11-18 19:45:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:45:35,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465501653] [2022-11-18 19:45:35,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:45:35,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:45:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:45:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:45:38,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:45:38,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465501653] [2022-11-18 19:45:38,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465501653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:45:38,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074062856] [2022-11-18 19:45:38,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:45:38,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:45:38,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:45:38,027 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:45:38,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:45:38,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:45:38,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:45:38,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 19:45:38,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:45:38,309 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 19:45:38,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 19:45:38,332 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 19:45:38,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 19:45:39,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 19:45:39,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-18 19:45:40,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-18 19:45:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:45:40,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:45:41,839 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_303 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_303) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-18 19:45:41,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:45:41,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-18 19:45:41,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 19:45:41,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-18 19:45:41,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-18 19:45:43,186 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 19:45:43,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 19:45:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 19:45:43,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074062856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:45:43,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:45:43,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 73 [2022-11-18 19:45:43,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581555746] [2022-11-18 19:45:43,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:45:43,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-18 19:45:43,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:45:43,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-18 19:45:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4846, Unknown=1, NotChecked=140, Total=5256 [2022-11-18 19:45:43,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-18 19:45:43,206 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 389 transitions, 3063 flow. Second operand has 73 states, 73 states have (on average 86.27397260273973) internal successors, (6298), 73 states have internal predecessors, (6298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:45:43,206 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:45:43,206 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-18 19:45:43,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:46:12,204 INFO L130 PetriNetUnfolder]: 3128/12678 cut-off events. [2022-11-18 19:46:12,204 INFO L131 PetriNetUnfolder]: For 15369/15369 co-relation queries the response was YES. [2022-11-18 19:46:12,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32897 conditions, 12678 events. 3128/12678 cut-off events. For 15369/15369 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 121488 event pairs, 143 based on Foata normal form. 8/12446 useless extension candidates. Maximal degree in co-relation 29986. Up to 1715 conditions per place. [2022-11-18 19:46:12,388 INFO L137 encePairwiseOnDemand]: 131/170 looper letters, 291 selfloop transitions, 275 changer transitions 3/645 dead transitions. [2022-11-18 19:46:12,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 645 transitions, 5399 flow [2022-11-18 19:46:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 19:46:12,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-18 19:46:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6224 transitions. [2022-11-18 19:46:12,402 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.515658657829329 [2022-11-18 19:46:12,402 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6224 transitions. [2022-11-18 19:46:12,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6224 transitions. [2022-11-18 19:46:12,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:46:12,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6224 transitions. [2022-11-18 19:46:12,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 87.66197183098592) internal successors, (6224), 71 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:12,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 170.0) internal successors, (12240), 72 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:12,439 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 170.0) internal successors, (12240), 72 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:12,439 INFO L175 Difference]: Start difference. First operand has 375 places, 389 transitions, 3063 flow. Second operand 71 states and 6224 transitions. [2022-11-18 19:46:12,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 645 transitions, 5399 flow [2022-11-18 19:46:12,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 645 transitions, 5001 flow, removed 166 selfloop flow, removed 12 redundant places. [2022-11-18 19:46:12,635 INFO L231 Difference]: Finished difference. Result has 448 places, 467 transitions, 4039 flow [2022-11-18 19:46:12,637 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=2721, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=4039, PETRI_PLACES=448, PETRI_TRANSITIONS=467} [2022-11-18 19:46:12,637 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 293 predicate places. [2022-11-18 19:46:12,638 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 467 transitions, 4039 flow [2022-11-18 19:46:12,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 86.27397260273973) internal successors, (6298), 73 states have internal predecessors, (6298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:12,640 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:46:12,640 INFO L209 CegarLoopForPetriNet]: trace histogram [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, 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] [2022-11-18 19:46:12,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:46:12,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:46:12,847 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:46:12,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:12,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1972381461, now seen corresponding path program 2 times [2022-11-18 19:46:12,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:46:12,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566155789] [2022-11-18 19:46:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:46:12,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:46:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 19:46:13,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:46:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566155789] [2022-11-18 19:46:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566155789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:46:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952447342] [2022-11-18 19:46:13,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:46:13,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:46:13,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:46:13,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:46:13,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:46:13,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:46:13,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:46:13,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 19:46:13,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 19:46:13,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 19:46:13,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952447342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:13,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:46:13,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-18 19:46:13,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689189440] [2022-11-18 19:46:13,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 19:46:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:46:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 19:46:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-18 19:46:13,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-18 19:46:13,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 467 transitions, 4039 flow. Second operand has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:13,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:46:13,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-18 19:46:13,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:46:16,302 INFO L130 PetriNetUnfolder]: 557/6448 cut-off events. [2022-11-18 19:46:16,302 INFO L131 PetriNetUnfolder]: For 10960/10961 co-relation queries the response was YES. [2022-11-18 19:46:16,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16558 conditions, 6448 events. 557/6448 cut-off events. For 10960/10961 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 54696 event pairs, 130 based on Foata normal form. 20/6316 useless extension candidates. Maximal degree in co-relation 15126. Up to 238 conditions per place. [2022-11-18 19:46:16,375 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 94 selfloop transitions, 153 changer transitions 1/562 dead transitions. [2022-11-18 19:46:16,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 562 transitions, 5260 flow [2022-11-18 19:46:16,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 19:46:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 19:46:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3214 transitions. [2022-11-18 19:46:16,382 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8593582887700535 [2022-11-18 19:46:16,382 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3214 transitions. [2022-11-18 19:46:16,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3214 transitions. [2022-11-18 19:46:16,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:46:16,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3214 transitions. [2022-11-18 19:46:16,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.0909090909091) internal successors, (3214), 22 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:16,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:16,399 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:16,400 INFO L175 Difference]: Start difference. First operand has 448 places, 467 transitions, 4039 flow. Second operand 22 states and 3214 transitions. [2022-11-18 19:46:16,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 562 transitions, 5260 flow [2022-11-18 19:46:16,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 562 transitions, 4896 flow, removed 77 selfloop flow, removed 16 redundant places. [2022-11-18 19:46:16,543 INFO L231 Difference]: Finished difference. Result has 458 places, 501 transitions, 4508 flow [2022-11-18 19:46:16,543 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=3708, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4508, PETRI_PLACES=458, PETRI_TRANSITIONS=501} [2022-11-18 19:46:16,544 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 303 predicate places. [2022-11-18 19:46:16,544 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 501 transitions, 4508 flow [2022-11-18 19:46:16,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:16,545 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:46:16,546 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, 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] [2022-11-18 19:46:16,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:46:16,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:46:16,763 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:46:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:46:16,764 INFO L85 PathProgramCache]: Analyzing trace with hash 443849610, now seen corresponding path program 1 times [2022-11-18 19:46:16,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:46:16,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124357643] [2022-11-18 19:46:16,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:46:16,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:46:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:20,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:46:20,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124357643] [2022-11-18 19:46:20,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124357643] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:46:20,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915549969] [2022-11-18 19:46:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:46:20,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:46:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:46:20,042 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:46:20,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:46:20,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:46:20,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-18 19:46:20,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:46:21,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 19:46:22,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:46:22,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-18 19:46:25,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-18 19:46:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:25,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:46:29,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-11-18 19:46:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:46:30,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915549969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:46:30,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:46:30,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 32] total 97 [2022-11-18 19:46:30,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833413814] [2022-11-18 19:46:30,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:46:30,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-18 19:46:30,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:46:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-18 19:46:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=8519, Unknown=0, NotChecked=0, Total=9312 [2022-11-18 19:46:30,653 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-18 19:46:30,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 501 transitions, 4508 flow. Second operand has 97 states, 97 states have (on average 98.0) internal successors, (9506), 97 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:46:30,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:46:30,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-18 19:46:30,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:48:20,728 INFO L130 PetriNetUnfolder]: 9488/39206 cut-off events. [2022-11-18 19:48:20,728 INFO L131 PetriNetUnfolder]: For 66371/66373 co-relation queries the response was YES. [2022-11-18 19:48:21,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108455 conditions, 39206 events. 9488/39206 cut-off events. For 66371/66373 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 430845 event pairs, 1374 based on Foata normal form. 82/38536 useless extension candidates. Maximal degree in co-relation 99624. Up to 7057 conditions per place. [2022-11-18 19:48:21,288 INFO L137 encePairwiseOnDemand]: 126/170 looper letters, 1894 selfloop transitions, 993 changer transitions 277/3248 dead transitions. [2022-11-18 19:48:21,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 896 places, 3248 transitions, 29041 flow [2022-11-18 19:48:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 439 states. [2022-11-18 19:48:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2022-11-18 19:48:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 43736 transitions. [2022-11-18 19:48:21,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5860377864129707 [2022-11-18 19:48:21,344 INFO L72 ComplementDD]: Start complementDD. Operand 439 states and 43736 transitions. [2022-11-18 19:48:21,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 439 states and 43736 transitions. [2022-11-18 19:48:21,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:48:21,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 439 states and 43736 transitions. [2022-11-18 19:48:21,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 440 states, 439 states have (on average 99.62642369020502) internal successors, (43736), 439 states have internal predecessors, (43736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:48:21,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 440 states, 440 states have (on average 170.0) internal successors, (74800), 440 states have internal predecessors, (74800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:48:21,547 INFO L81 ComplementDD]: Finished complementDD. Result has 440 states, 440 states have (on average 170.0) internal successors, (74800), 440 states have internal predecessors, (74800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:48:21,548 INFO L175 Difference]: Start difference. First operand has 458 places, 501 transitions, 4508 flow. Second operand 439 states and 43736 transitions. [2022-11-18 19:48:21,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 896 places, 3248 transitions, 29041 flow [2022-11-18 19:48:22,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 889 places, 3248 transitions, 28195 flow, removed 280 selfloop flow, removed 7 redundant places. [2022-11-18 19:48:22,074 INFO L231 Difference]: Finished difference. Result has 1062 places, 1572 transitions, 18334 flow [2022-11-18 19:48:22,075 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=439, PETRI_FLOW=18334, PETRI_PLACES=1062, PETRI_TRANSITIONS=1572} [2022-11-18 19:48:22,075 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 907 predicate places. [2022-11-18 19:48:22,075 INFO L495 AbstractCegarLoop]: Abstraction has has 1062 places, 1572 transitions, 18334 flow [2022-11-18 19:48:22,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 98.0) internal successors, (9506), 97 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:48:22,077 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:48:22,077 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, 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] [2022-11-18 19:48:22,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 19:48:22,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 19:48:22,284 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 19:48:22,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:48:22,285 INFO L85 PathProgramCache]: Analyzing trace with hash -837044260, now seen corresponding path program 2 times [2022-11-18 19:48:22,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:48:22,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562640020] [2022-11-18 19:48:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:48:22,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:48:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:48:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:48:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:48:25,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562640020] [2022-11-18 19:48:25,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562640020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:48:25,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140589175] [2022-11-18 19:48:25,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:48:25,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:48:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:48:25,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:48:25,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8cc20aeb-86b5-4feb-9bb2-63b023c7c566/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 19:48:25,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:48:25,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:48:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 19:48:25,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:48:26,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 19:48:27,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 19:48:27,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2022-11-18 19:48:29,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-18 19:48:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:48:30,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:48:36,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-18 19:48:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:48:37,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140589175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:48:37,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:48:37,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31, 29] total 90 [2022-11-18 19:48:37,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764451844] [2022-11-18 19:48:37,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:48:37,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-18 19:48:37,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:48:37,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-18 19:48:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=7658, Unknown=1, NotChecked=0, Total=8010 [2022-11-18 19:48:37,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-18 19:48:37,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1062 places, 1572 transitions, 18334 flow. Second operand has 90 states, 90 states have (on average 98.23333333333333) internal successors, (8841), 90 states have internal predecessors, (8841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:48:37,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:48:37,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-18 19:48:37,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand