./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R --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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- 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-38b53e6 [2022-11-25 18:27:29,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:27:29,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:27:29,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:27:29,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:27:29,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:27:29,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:27:29,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:27:29,571 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:27:29,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:27:29,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:27:29,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:27:29,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:27:29,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:27:29,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:27:29,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:27:29,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:27:29,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:27:29,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:27:29,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:27:29,606 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:27:29,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:27:29,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:27:29,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:27:29,629 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:27:29,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:27:29,630 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:27:29,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:27:29,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:27:29,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:27:29,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:27:29,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:27:29,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:27:29,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:27:29,638 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:27:29,638 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:27:29,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:27:29,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:27:29,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:27:29,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:27:29,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:27:29,652 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:27:29,711 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:27:29,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:27:29,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:27:29,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:27:29,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:27:29,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:27:29,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:27:29,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:27:29,716 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:27:29,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:27:29,717 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:27:29,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:27:29,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:27:29,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:27:29,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:27:29,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:27:29,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:27:29,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:27:29,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:27:29,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:27:29,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:27:29,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:27:29,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:27:29,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:27:29,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:27:29,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:27:29,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:27:29,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:27:29,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:27:29,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:27:29,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:27:29,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:27:29,724 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:27:29,724 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:27:29,725 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2022-11-25 18:27:30,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:27:30,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:27:30,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:27:30,161 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:27:30,162 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:27:30,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-25 18:27:34,128 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:27:34,457 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:27:34,458 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2022-11-25 18:27:34,468 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/data/a810d9bd8/5c39a63541fa487181ce5d336968d4d8/FLAGee966d2cd [2022-11-25 18:27:34,497 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/data/a810d9bd8/5c39a63541fa487181ce5d336968d4d8 [2022-11-25 18:27:34,500 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:27:34,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:27:34,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:27:34,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:27:34,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:27:34,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:34,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1186087f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34, skipping insertion in model container [2022-11-25 18:27:34,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:34,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:27:34,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:27:34,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:27:34,831 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:27:34,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:27:34,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:27:34,841 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:27:34,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:27:34,868 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-25 18:27:34,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:27:34,907 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:27:34,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:27:34,934 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:27:34,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:27:34,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:27:34,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:27:34,945 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:27:34,951 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c[2650,2663] [2022-11-25 18:27:34,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:27:34,973 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:27:34,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34 WrapperNode [2022-11-25 18:27:34,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:27:34,976 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:27:34,976 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:27:34,976 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:27:34,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,063 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2022-11-25 18:27:35,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:27:35,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:27:35,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:27:35,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:27:35,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,141 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:27:35,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:27:35,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:27:35,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:27:35,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (1/1) ... [2022-11-25 18:27:35,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:27:35,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:27:35,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:27:35,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:27:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:27:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:27:35,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:27:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:27:35,258 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:27:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:27:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:27:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:27:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:27:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:27:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:27:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:27:35,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:27:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:27:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:27:35,262 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:27:35,395 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:27:35,402 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:27:35,906 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:27:36,069 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:27:36,070 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 18:27:36,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:27:36 BoogieIcfgContainer [2022-11-25 18:27:36,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:27:36,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:27:36,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:27:36,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:27:36,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:27:34" (1/3) ... [2022-11-25 18:27:36,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2babd70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:27:36, skipping insertion in model container [2022-11-25 18:27:36,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:34" (2/3) ... [2022-11-25 18:27:36,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2babd70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:27:36, skipping insertion in model container [2022-11-25 18:27:36,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:27:36" (3/3) ... [2022-11-25 18:27:36,092 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2022-11-25 18:27:36,107 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 18:27:36,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:27:36,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:27:36,121 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:27:36,218 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:27:36,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 133 transitions, 282 flow [2022-11-25 18:27:36,425 INFO L130 PetriNetUnfolder]: 11/131 cut-off events. [2022-11-25 18:27:36,425 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:27:36,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 131 events. 11/131 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-25 18:27:36,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 133 transitions, 282 flow [2022-11-25 18:27:36,459 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 122 transitions, 256 flow [2022-11-25 18:27:36,479 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:27:36,516 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 122 transitions, 256 flow [2022-11-25 18:27:36,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 122 transitions, 256 flow [2022-11-25 18:27:36,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 122 transitions, 256 flow [2022-11-25 18:27:36,597 INFO L130 PetriNetUnfolder]: 11/122 cut-off events. [2022-11-25 18:27:36,597 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:27:36,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 122 events. 11/122 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2022-11-25 18:27:36,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 732 [2022-11-25 18:27:43,524 INFO L134 LiptonReduction]: Checked pairs total: 837 [2022-11-25 18:27:43,525 INFO L136 LiptonReduction]: Total number of compositions: 130 [2022-11-25 18:27:43,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:27:43,578 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;@7bf9c1d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:27:43,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 18:27:43,590 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2022-11-25 18:27:43,593 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:27:43,595 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:43,597 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:43,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:27:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:43,605 INFO L85 PathProgramCache]: Analyzing trace with hash -446582098, now seen corresponding path program 1 times [2022-11-25 18:27:43,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:43,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964065087] [2022-11-25 18:27:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:43,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:44,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:27:44,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964065087] [2022-11-25 18:27:44,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964065087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:44,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:44,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:27:44,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714118636] [2022-11-25 18:27:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:44,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:27:44,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:27:44,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:27:44,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:27:44,190 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 263 [2022-11-25 18:27:44,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:44,198 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 263 [2022-11-25 18:27:44,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:44,326 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2022-11-25 18:27:44,327 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-25 18:27:44,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 313 event pairs, 20 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2022-11-25 18:27:44,333 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2022-11-25 18:27:44,333 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2022-11-25 18:27:44,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2022-11-25 18:27:44,363 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47782002534854245 [2022-11-25 18:27:44,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2022-11-25 18:27:44,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2022-11-25 18:27:44,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:44,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2022-11-25 18:27:44,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,395 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 377 transitions. [2022-11-25 18:27:44,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2022-11-25 18:27:44,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:27:44,406 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2022-11-25 18:27:44,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2022-11-25 18:27:44,414 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2022-11-25 18:27:44,415 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2022-11-25 18:27:44,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,418 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:44,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:44,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:27:44,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:27:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:44,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1992880690, now seen corresponding path program 1 times [2022-11-25 18:27:44,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:44,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203075067] [2022-11-25 18:27:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:44,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:44,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:27:44,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203075067] [2022-11-25 18:27:44,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203075067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:44,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:44,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:27:44,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663735349] [2022-11-25 18:27:44,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:44,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:27:44,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:27:44,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:27:44,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:27:44,732 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 263 [2022-11-25 18:27:44,733 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,733 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:44,733 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 263 [2022-11-25 18:27:44,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:44,812 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2022-11-25 18:27:44,812 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-11-25 18:27:44,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 230 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2022-11-25 18:27:44,813 INFO L137 encePairwiseOnDemand]: 260/263 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2022-11-25 18:27:44,813 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2022-11-25 18:27:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:27:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:27:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2022-11-25 18:27:44,816 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4550063371356147 [2022-11-25 18:27:44,816 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2022-11-25 18:27:44,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2022-11-25 18:27:44,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:44,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2022-11-25 18:27:44,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,822 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 359 transitions. [2022-11-25 18:27:44,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2022-11-25 18:27:44,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:44,823 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2022-11-25 18:27:44,841 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2022-11-25 18:27:44,842 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2022-11-25 18:27:44,842 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2022-11-25 18:27:44,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:44,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:44,844 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:44,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:27:44,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:27:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:44,846 INFO L85 PathProgramCache]: Analyzing trace with hash -527546347, now seen corresponding path program 1 times [2022-11-25 18:27:44,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:44,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401576355] [2022-11-25 18:27:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:44,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:45,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:27:45,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401576355] [2022-11-25 18:27:45,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401576355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:27:45,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:27:45,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:27:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298409526] [2022-11-25 18:27:45,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:27:45,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:27:45,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:27:45,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:27:45,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:27:45,198 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 263 [2022-11-25 18:27:45,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 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) [2022-11-25 18:27:45,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:45,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 263 [2022-11-25 18:27:45,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:45,324 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2022-11-25 18:27:45,324 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2022-11-25 18:27:45,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 406 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2022-11-25 18:27:45,326 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2022-11-25 18:27:45,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2022-11-25 18:27:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:27:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:27:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2022-11-25 18:27:45,329 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4515209125475285 [2022-11-25 18:27:45,329 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2022-11-25 18:27:45,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2022-11-25 18:27:45,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:45,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2022-11-25 18:27:45,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:45,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:45,335 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:45,335 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 475 transitions. [2022-11-25 18:27:45,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2022-11-25 18:27:45,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:45,337 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2022-11-25 18:27:45,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2022-11-25 18:27:45,339 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-11-25 18:27:45,339 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2022-11-25 18:27:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 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) [2022-11-25 18:27:45,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:45,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:45,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:27:45,340 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:27:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:45,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1561421156, now seen corresponding path program 1 times [2022-11-25 18:27:45,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:45,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142742156] [2022-11-25 18:27:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:46,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:27:46,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142742156] [2022-11-25 18:27:46,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142742156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:27:46,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193698539] [2022-11-25 18:27:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:46,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:46,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:27:46,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:27:46,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:27:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:46,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-25 18:27:46,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:46,745 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 11 treesize of output 7 [2022-11-25 18:27:46,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:27:46,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:27:47,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-25 18:27:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:47,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:47,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:27:47,979 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 63 treesize of output 51 [2022-11-25 18:27:48,010 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:27:48,011 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 325 treesize of output 305 [2022-11-25 18:27:48,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:27:48,035 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 293 treesize of output 257 [2022-11-25 18:27:48,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:27:48,058 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 245 treesize of output 233 [2022-11-25 18:27:48,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:27:48,418 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 63 treesize of output 51 [2022-11-25 18:27:48,438 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 18:27:48,439 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 153 treesize of output 141 [2022-11-25 18:27:48,459 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 18:27:48,460 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 137 treesize of output 117 [2022-11-25 18:27:48,484 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-11-25 18:27:48,484 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 113 treesize of output 105 [2022-11-25 18:27:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:48,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193698539] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:48,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:27:48,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-11-25 18:27:48,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146144238] [2022-11-25 18:27:48,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:48,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:27:48,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:27:48,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:27:48,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=341, Unknown=2, NotChecked=0, Total=462 [2022-11-25 18:27:49,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-25 18:27:49,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 22 states, 22 states have (on average 77.95454545454545) internal successors, (1715), 22 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:49,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:49,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-25 18:27:49,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:55,470 INFO L130 PetriNetUnfolder]: 229/449 cut-off events. [2022-11-25 18:27:55,471 INFO L131 PetriNetUnfolder]: For 102/102 co-relation queries the response was YES. [2022-11-25 18:27:55,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 449 events. 229/449 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1932 event pairs, 30 based on Foata normal form. 3/448 useless extension candidates. Maximal degree in co-relation 1070. Up to 102 conditions per place. [2022-11-25 18:27:55,479 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 55 selfloop transitions, 24 changer transitions 50/129 dead transitions. [2022-11-25 18:27:55,479 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 129 transitions, 637 flow [2022-11-25 18:27:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:27:55,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:27:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1650 transitions. [2022-11-25 18:27:55,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31368821292775667 [2022-11-25 18:27:55,487 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1650 transitions. [2022-11-25 18:27:55,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1650 transitions. [2022-11-25 18:27:55,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:55,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1650 transitions. [2022-11-25 18:27:55,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 82.5) internal successors, (1650), 20 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:55,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 263.0) internal successors, (5523), 21 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:55,510 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 263.0) internal successors, (5523), 21 states have internal predecessors, (5523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:55,511 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 20 states and 1650 transitions. [2022-11-25 18:27:55,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 129 transitions, 637 flow [2022-11-25 18:27:55,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 129 transitions, 625 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 18:27:55,519 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 248 flow [2022-11-25 18:27:55,519 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=248, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2022-11-25 18:27:55,521 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2022-11-25 18:27:55,522 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 248 flow [2022-11-25 18:27:55,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 77.95454545454545) internal successors, (1715), 22 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:55,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:55,523 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:55,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:27:55,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:55,730 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:27:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:55,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1996781984, now seen corresponding path program 2 times [2022-11-25 18:27:55,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:55,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451737529] [2022-11-25 18:27:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:55,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:27:56,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:27:56,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451737529] [2022-11-25 18:27:56,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451737529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:27:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045715826] [2022-11-25 18:27:56,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:27:56,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:56,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:27:56,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:27:56,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:27:56,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:27:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:27:56,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:27:56,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:56,350 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 124 treesize of output 92 [2022-11-25 18:27:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:56,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:56,533 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 136 treesize of output 104 [2022-11-25 18:27:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:56,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045715826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:56,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:27:56,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 11 [2022-11-25 18:27:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7067475] [2022-11-25 18:27:56,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:56,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:27:56,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:27:56,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:27:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:27:56,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 263 [2022-11-25 18:27:56,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 248 flow. Second operand has 12 states, 12 states have (on average 110.16666666666667) internal successors, (1322), 12 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:56,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:56,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 263 [2022-11-25 18:27:56,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:57,108 INFO L130 PetriNetUnfolder]: 341/679 cut-off events. [2022-11-25 18:27:57,108 INFO L131 PetriNetUnfolder]: For 673/675 co-relation queries the response was YES. [2022-11-25 18:27:57,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1999 conditions, 679 events. 341/679 cut-off events. For 673/675 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3370 event pairs, 76 based on Foata normal form. 24/687 useless extension candidates. Maximal degree in co-relation 1704. Up to 163 conditions per place. [2022-11-25 18:27:57,113 INFO L137 encePairwiseOnDemand]: 258/263 looper letters, 56 selfloop transitions, 21 changer transitions 5/86 dead transitions. [2022-11-25 18:27:57,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 86 transitions, 597 flow [2022-11-25 18:27:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:27:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-25 18:27:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1027 transitions. [2022-11-25 18:27:57,118 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43388255175327417 [2022-11-25 18:27:57,118 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1027 transitions. [2022-11-25 18:27:57,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1027 transitions. [2022-11-25 18:27:57,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:57,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1027 transitions. [2022-11-25 18:27:57,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 114.11111111111111) internal successors, (1027), 9 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:57,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:57,128 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 263.0) internal successors, (2630), 10 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:57,129 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 248 flow. Second operand 9 states and 1027 transitions. [2022-11-25 18:27:57,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 86 transitions, 597 flow [2022-11-25 18:27:57,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 573 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-11-25 18:27:57,141 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 361 flow [2022-11-25 18:27:57,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=361, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2022-11-25 18:27:57,144 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2022-11-25 18:27:57,144 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 361 flow [2022-11-25 18:27:57,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.16666666666667) internal successors, (1322), 12 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:57,146 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:57,146 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:57,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:27:57,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:57,353 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:27:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash -483408937, now seen corresponding path program 3 times [2022-11-25 18:27:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:57,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125766121] [2022-11-25 18:27:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:27:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:57,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:27:57,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125766121] [2022-11-25 18:27:57,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125766121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:27:57,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793583566] [2022-11-25 18:27:57,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:27:57,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:57,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:27:57,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:27:57,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:27:57,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:27:57,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:27:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:27:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:57,859 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 124 treesize of output 92 [2022-11-25 18:27:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:57,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:58,104 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 136 treesize of output 104 [2022-11-25 18:27:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:27:58,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793583566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:58,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:27:58,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-25 18:27:58,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192357552] [2022-11-25 18:27:58,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:58,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:27:58,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:27:58,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:27:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:27:58,422 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 263 [2022-11-25 18:27:58,424 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 361 flow. Second operand has 12 states, 12 states have (on average 110.41666666666667) internal successors, (1325), 12 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:58,424 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:27:58,424 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 263 [2022-11-25 18:27:58,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:27:58,691 INFO L130 PetriNetUnfolder]: 229/473 cut-off events. [2022-11-25 18:27:58,691 INFO L131 PetriNetUnfolder]: For 882/884 co-relation queries the response was YES. [2022-11-25 18:27:58,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1559 conditions, 473 events. 229/473 cut-off events. For 882/884 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2220 event pairs, 154 based on Foata normal form. 12/469 useless extension candidates. Maximal degree in co-relation 1523. Up to 389 conditions per place. [2022-11-25 18:27:58,695 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 31 selfloop transitions, 3 changer transitions 19/56 dead transitions. [2022-11-25 18:27:58,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 56 transitions, 439 flow [2022-11-25 18:27:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:27:58,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:27:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 684 transitions. [2022-11-25 18:27:58,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43346007604562736 [2022-11-25 18:27:58,699 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 684 transitions. [2022-11-25 18:27:58,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 684 transitions. [2022-11-25 18:27:58,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:27:58,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 684 transitions. [2022-11-25 18:27:58,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:58,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 263.0) internal successors, (1841), 7 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:58,706 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 263.0) internal successors, (1841), 7 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:58,706 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 361 flow. Second operand 6 states and 684 transitions. [2022-11-25 18:27:58,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 56 transitions, 439 flow [2022-11-25 18:27:58,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 408 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-11-25 18:27:58,712 INFO L231 Difference]: Finished difference. Result has 54 places, 37 transitions, 247 flow [2022-11-25 18:27:58,712 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=54, PETRI_TRANSITIONS=37} [2022-11-25 18:27:58,713 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2022-11-25 18:27:58,713 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 37 transitions, 247 flow [2022-11-25 18:27:58,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 110.41666666666667) internal successors, (1325), 12 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:27:58,714 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:27:58,715 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:58,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:27:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:58,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:27:58,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:58,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1357906211, now seen corresponding path program 4 times [2022-11-25 18:27:58,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:58,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943583148] [2022-11-25 18:27:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:58,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:01,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:01,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943583148] [2022-11-25 18:28:01,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943583148] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:01,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468732382] [2022-11-25 18:28:01,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:28:01,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:01,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:01,123 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:01,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:28:01,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:28:01,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:28:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:28:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:01,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-25 18:28:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:28:01,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:01,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:01,745 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 70 treesize of output 50 [2022-11-25 18:28:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:28:01,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468732382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:01,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:01,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2022-11-25 18:28:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942061922] [2022-11-25 18:28:01,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:01,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:28:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:28:01,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:28:03,608 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 263 [2022-11-25 18:28:03,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 37 transitions, 247 flow. Second operand has 22 states, 22 states have (on average 98.22727272727273) internal successors, (2161), 22 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:03,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:03,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 263 [2022-11-25 18:28:03,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:05,182 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2022-11-25 18:28:05,183 INFO L131 PetriNetUnfolder]: For 574/574 co-relation queries the response was YES. [2022-11-25 18:28:05,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1833 conditions, 613 events. 313/613 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2822 event pairs, 48 based on Foata normal form. 3/616 useless extension candidates. Maximal degree in co-relation 1802. Up to 174 conditions per place. [2022-11-25 18:28:05,188 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 49 selfloop transitions, 25 changer transitions 44/118 dead transitions. [2022-11-25 18:28:05,188 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 118 transitions, 758 flow [2022-11-25 18:28:05,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:28:05,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:28:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1641 transitions. [2022-11-25 18:28:05,195 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3899714828897338 [2022-11-25 18:28:05,196 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1641 transitions. [2022-11-25 18:28:05,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1641 transitions. [2022-11-25 18:28:05,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:05,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1641 transitions. [2022-11-25 18:28:05,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 102.5625) internal successors, (1641), 16 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:05,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 263.0) internal successors, (4471), 17 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:05,213 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 263.0) internal successors, (4471), 17 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:05,213 INFO L175 Difference]: Start difference. First operand has 54 places, 37 transitions, 247 flow. Second operand 16 states and 1641 transitions. [2022-11-25 18:28:05,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 118 transitions, 758 flow [2022-11-25 18:28:05,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 118 transitions, 750 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 18:28:05,222 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 382 flow [2022-11-25 18:28:05,222 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=382, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2022-11-25 18:28:05,223 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 41 predicate places. [2022-11-25 18:28:05,223 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 382 flow [2022-11-25 18:28:05,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.22727272727273) internal successors, (2161), 22 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:05,225 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:05,226 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:05,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:05,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:05,433 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:28:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:05,434 INFO L85 PathProgramCache]: Analyzing trace with hash -418021832, now seen corresponding path program 5 times [2022-11-25 18:28:05,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:05,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317791040] [2022-11-25 18:28:05,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:05,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:06,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:06,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317791040] [2022-11-25 18:28:06,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317791040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:06,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936809601] [2022-11-25 18:28:06,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:28:06,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:06,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:06,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:06,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:28:07,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:28:07,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:28:07,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 18:28:07,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:07,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:07,518 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 48 treesize of output 14 [2022-11-25 18:28:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:07,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:08,051 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-25 18:28:08,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 196 [2022-11-25 18:28:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:09,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936809601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:09,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:09,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 25 [2022-11-25 18:28:09,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992677216] [2022-11-25 18:28:09,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:09,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:28:09,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:09,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:28:09,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:28:10,817 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 263 [2022-11-25 18:28:10,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 382 flow. Second operand has 27 states, 27 states have (on average 96.92592592592592) internal successors, (2617), 27 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:10,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:10,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 263 [2022-11-25 18:28:10,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:13,472 INFO L130 PetriNetUnfolder]: 661/1251 cut-off events. [2022-11-25 18:28:13,472 INFO L131 PetriNetUnfolder]: For 1890/1890 co-relation queries the response was YES. [2022-11-25 18:28:13,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1251 events. 661/1251 cut-off events. For 1890/1890 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6820 event pairs, 100 based on Foata normal form. 6/1257 useless extension candidates. Maximal degree in co-relation 2912. Up to 285 conditions per place. [2022-11-25 18:28:13,482 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 103 selfloop transitions, 47 changer transitions 74/224 dead transitions. [2022-11-25 18:28:13,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 224 transitions, 1557 flow [2022-11-25 18:28:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 18:28:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 18:28:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2769 transitions. [2022-11-25 18:28:13,494 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38994507815800594 [2022-11-25 18:28:13,495 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2769 transitions. [2022-11-25 18:28:13,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2769 transitions. [2022-11-25 18:28:13,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:13,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2769 transitions. [2022-11-25 18:28:13,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.55555555555556) internal successors, (2769), 27 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:13,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:13,521 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:13,521 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 382 flow. Second operand 27 states and 2769 transitions. [2022-11-25 18:28:13,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 224 transitions, 1557 flow [2022-11-25 18:28:13,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 224 transitions, 1477 flow, removed 19 selfloop flow, removed 9 redundant places. [2022-11-25 18:28:13,534 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 828 flow [2022-11-25 18:28:13,535 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=828, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2022-11-25 18:28:13,538 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 73 predicate places. [2022-11-25 18:28:13,538 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 828 flow [2022-11-25 18:28:13,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 96.92592592592592) internal successors, (2617), 27 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:13,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:13,540 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:13,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:13,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:13,748 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:28:13,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:13,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1941342344, now seen corresponding path program 6 times [2022-11-25 18:28:13,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:13,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887483637] [2022-11-25 18:28:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:13,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:15,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:15,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887483637] [2022-11-25 18:28:15,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887483637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966525114] [2022-11-25 18:28:15,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:28:15,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:15,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:15,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:15,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:28:15,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:28:15,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:28:15,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 18:28:15,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:15,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 18:28:15,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:28:16,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:28:16,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:16,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 14 [2022-11-25 18:28:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:16,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:17,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:17,859 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 124 treesize of output 88 [2022-11-25 18:28:17,918 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 18:28:17,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 275 [2022-11-25 18:28:17,984 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 18:28:17,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 223 [2022-11-25 18:28:18,050 INFO L321 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2022-11-25 18:28:18,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 197 [2022-11-25 18:28:19,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:19,266 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 124 treesize of output 88 [2022-11-25 18:28:19,301 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 18:28:19,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 271 treesize of output 245 [2022-11-25 18:28:19,338 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 18:28:19,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 193 [2022-11-25 18:28:19,373 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-11-25 18:28:19,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 167 [2022-11-25 18:28:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:19,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966525114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:19,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:19,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-11-25 18:28:19,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11569062] [2022-11-25 18:28:19,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:19,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 18:28:19,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 18:28:19,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=713, Unknown=4, NotChecked=0, Total=930 [2022-11-25 18:28:22,183 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-25 18:28:22,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 828 flow. Second operand has 31 states, 31 states have (on average 77.64516129032258) internal successors, (2407), 31 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:22,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:22,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-25 18:28:22,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:28,621 INFO L130 PetriNetUnfolder]: 974/1836 cut-off events. [2022-11-25 18:28:28,621 INFO L131 PetriNetUnfolder]: For 8816/8816 co-relation queries the response was YES. [2022-11-25 18:28:28,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7461 conditions, 1836 events. 974/1836 cut-off events. For 8816/8816 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10966 event pairs, 96 based on Foata normal form. 8/1844 useless extension candidates. Maximal degree in co-relation 7183. Up to 461 conditions per place. [2022-11-25 18:28:28,637 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 98 selfloop transitions, 69 changer transitions 98/265 dead transitions. [2022-11-25 18:28:28,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 265 transitions, 2253 flow [2022-11-25 18:28:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 18:28:28,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-25 18:28:28,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2804 transitions. [2022-11-25 18:28:28,650 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31357638112279135 [2022-11-25 18:28:28,650 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2804 transitions. [2022-11-25 18:28:28,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2804 transitions. [2022-11-25 18:28:28,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:28,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2804 transitions. [2022-11-25 18:28:28,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 82.47058823529412) internal successors, (2804), 34 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:28,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 263.0) internal successors, (9205), 35 states have internal predecessors, (9205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:28,701 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 263.0) internal successors, (9205), 35 states have internal predecessors, (9205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:28,701 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 828 flow. Second operand 34 states and 2804 transitions. [2022-11-25 18:28:28,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 265 transitions, 2253 flow [2022-11-25 18:28:28,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 265 transitions, 2117 flow, removed 64 selfloop flow, removed 4 redundant places. [2022-11-25 18:28:28,784 INFO L231 Difference]: Finished difference. Result has 132 places, 105 transitions, 1261 flow [2022-11-25 18:28:28,784 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=714, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1261, PETRI_PLACES=132, PETRI_TRANSITIONS=105} [2022-11-25 18:28:28,785 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 112 predicate places. [2022-11-25 18:28:28,785 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 105 transitions, 1261 flow [2022-11-25 18:28:28,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 77.64516129032258) internal successors, (2407), 31 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:28,786 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:28,786 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:28,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:28,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:28,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:28:28,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1202898536, now seen corresponding path program 7 times [2022-11-25 18:28:28,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:28,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688357011] [2022-11-25 18:28:28,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:28:29,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688357011] [2022-11-25 18:28:29,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688357011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:29,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888864969] [2022-11-25 18:28:29,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:28:29,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:29,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:29,344 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:29,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:28:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:28:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:29,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:29,718 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 170 treesize of output 120 [2022-11-25 18:28:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:28:29,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:30,173 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 18:28:30,174 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 193 treesize of output 145 [2022-11-25 18:28:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:28:30,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888864969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:30,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:30,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2022-11-25 18:28:30,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904946013] [2022-11-25 18:28:30,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:30,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:28:30,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:28:30,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:28:30,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 263 [2022-11-25 18:28:30,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 105 transitions, 1261 flow. Second operand has 18 states, 18 states have (on average 102.66666666666667) internal successors, (1848), 18 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:30,693 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:30,693 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 263 [2022-11-25 18:28:30,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:31,851 INFO L130 PetriNetUnfolder]: 1538/2914 cut-off events. [2022-11-25 18:28:31,851 INFO L131 PetriNetUnfolder]: For 25162/25162 co-relation queries the response was YES. [2022-11-25 18:28:31,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13795 conditions, 2914 events. 1538/2914 cut-off events. For 25162/25162 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19256 event pairs, 245 based on Foata normal form. 52/2966 useless extension candidates. Maximal degree in co-relation 12973. Up to 647 conditions per place. [2022-11-25 18:28:31,877 INFO L137 encePairwiseOnDemand]: 258/263 looper letters, 108 selfloop transitions, 87 changer transitions 25/220 dead transitions. [2022-11-25 18:28:31,877 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 220 transitions, 2678 flow [2022-11-25 18:28:31,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:28:31,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 18:28:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1826 transitions. [2022-11-25 18:28:31,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.408409751733393 [2022-11-25 18:28:31,885 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1826 transitions. [2022-11-25 18:28:31,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1826 transitions. [2022-11-25 18:28:31,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:31,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1826 transitions. [2022-11-25 18:28:31,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 107.41176470588235) internal successors, (1826), 17 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:31,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 263.0) internal successors, (4734), 18 states have internal predecessors, (4734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:31,899 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 263.0) internal successors, (4734), 18 states have internal predecessors, (4734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:31,899 INFO L175 Difference]: Start difference. First operand has 132 places, 105 transitions, 1261 flow. Second operand 17 states and 1826 transitions. [2022-11-25 18:28:31,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 220 transitions, 2678 flow [2022-11-25 18:28:31,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 220 transitions, 2361 flow, removed 115 selfloop flow, removed 25 redundant places. [2022-11-25 18:28:31,987 INFO L231 Difference]: Finished difference. Result has 123 places, 139 transitions, 1846 flow [2022-11-25 18:28:31,987 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1846, PETRI_PLACES=123, PETRI_TRANSITIONS=139} [2022-11-25 18:28:31,988 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2022-11-25 18:28:31,988 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 139 transitions, 1846 flow [2022-11-25 18:28:31,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 102.66666666666667) internal successors, (1848), 18 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:31,989 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:31,989 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:32,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:28:32,200 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:28:32,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1201002923, now seen corresponding path program 8 times [2022-11-25 18:28:32,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:32,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917269084] [2022-11-25 18:28:32,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:32,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:28:32,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917269084] [2022-11-25 18:28:32,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917269084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042234500] [2022-11-25 18:28:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:28:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:32,447 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:32,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:28:32,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:28:32,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:28:32,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:28:32,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:32,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:32,838 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 176 treesize of output 126 [2022-11-25 18:28:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:28:32,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:33,153 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-25 18:28:33,154 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 201 treesize of output 153 [2022-11-25 18:28:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:28:33,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042234500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:33,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:33,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 18:28:33,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390053759] [2022-11-25 18:28:33,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:33,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:28:33,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:33,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:28:33,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:28:33,637 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 263 [2022-11-25 18:28:33,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 139 transitions, 1846 flow. Second operand has 18 states, 18 states have (on average 103.0) internal successors, (1854), 18 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:33,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:33,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 263 [2022-11-25 18:28:33,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:34,286 INFO L130 PetriNetUnfolder]: 1040/1994 cut-off events. [2022-11-25 18:28:34,286 INFO L131 PetriNetUnfolder]: For 13011/13011 co-relation queries the response was YES. [2022-11-25 18:28:34,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9326 conditions, 1994 events. 1040/1994 cut-off events. For 13011/13011 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12295 event pairs, 727 based on Foata normal form. 30/2024 useless extension candidates. Maximal degree in co-relation 9176. Up to 1786 conditions per place. [2022-11-25 18:28:34,301 INFO L137 encePairwiseOnDemand]: 259/263 looper letters, 89 selfloop transitions, 4 changer transitions 30/123 dead transitions. [2022-11-25 18:28:34,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 123 transitions, 1668 flow [2022-11-25 18:28:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:28:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:28:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 855 transitions. [2022-11-25 18:28:34,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4063688212927757 [2022-11-25 18:28:34,304 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 855 transitions. [2022-11-25 18:28:34,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 855 transitions. [2022-11-25 18:28:34,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:34,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 855 transitions. [2022-11-25 18:28:34,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.875) internal successors, (855), 8 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:34,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:34,309 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:34,309 INFO L175 Difference]: Start difference. First operand has 123 places, 139 transitions, 1846 flow. Second operand 8 states and 855 transitions. [2022-11-25 18:28:34,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 123 transitions, 1668 flow [2022-11-25 18:28:34,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 123 transitions, 1480 flow, removed 65 selfloop flow, removed 19 redundant places. [2022-11-25 18:28:34,356 INFO L231 Difference]: Finished difference. Result has 100 places, 93 transitions, 1109 flow [2022-11-25 18:28:34,357 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1109, PETRI_PLACES=100, PETRI_TRANSITIONS=93} [2022-11-25 18:28:34,357 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 80 predicate places. [2022-11-25 18:28:34,357 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 93 transitions, 1109 flow [2022-11-25 18:28:34,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.0) internal successors, (1854), 18 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:34,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:34,358 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:28:34,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:34,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:34,564 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:28:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:34,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1943278338, now seen corresponding path program 9 times [2022-11-25 18:28:34,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:34,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805524580] [2022-11-25 18:28:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:34,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:37,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:37,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805524580] [2022-11-25 18:28:37,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805524580] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:37,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102853149] [2022-11-25 18:28:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:28:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:37,152 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:37,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:28:37,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:28:37,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:28:37,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-25 18:28:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:37,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 18:28:37,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:28:37,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:28:38,755 INFO L321 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2022-11-25 18:28:38,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 24 [2022-11-25 18:28:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:38,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:43,112 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:43,113 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 180 treesize of output 120 [2022-11-25 18:28:43,261 INFO L321 Elim1Store]: treesize reduction 78, result has 50.3 percent of original size [2022-11-25 18:28:43,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 368 treesize of output 396 [2022-11-25 18:28:43,404 INFO L321 Elim1Store]: treesize reduction 78, result has 50.3 percent of original size [2022-11-25 18:28:43,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 318 treesize of output 320 [2022-11-25 18:28:43,559 INFO L321 Elim1Store]: treesize reduction 78, result has 50.3 percent of original size [2022-11-25 18:28:43,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 213 treesize of output 253 [2022-11-25 18:28:49,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:49,683 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 180 treesize of output 120 [2022-11-25 18:28:49,765 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 18:28:49,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 368 treesize of output 330 [2022-11-25 18:28:49,839 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 18:28:49,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 318 treesize of output 254 [2022-11-25 18:28:49,936 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 18:28:49,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 213 treesize of output 187 [2022-11-25 18:28:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:50,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102853149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:50,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:50,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-11-25 18:28:50,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025690422] [2022-11-25 18:28:50,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 18:28:50,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:50,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 18:28:50,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1276, Unknown=2, NotChecked=0, Total=1560 [2022-11-25 18:28:53,349 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-25 18:28:53,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 93 transitions, 1109 flow. Second operand has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:53,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:53,352 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-25 18:28:53,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:08,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:29:22,756 INFO L130 PetriNetUnfolder]: 1827/3514 cut-off events. [2022-11-25 18:29:22,757 INFO L131 PetriNetUnfolder]: For 12617/12617 co-relation queries the response was YES. [2022-11-25 18:29:22,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13218 conditions, 3514 events. 1827/3514 cut-off events. For 12617/12617 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 24278 event pairs, 230 based on Foata normal form. 94/3608 useless extension candidates. Maximal degree in co-relation 13172. Up to 924 conditions per place. [2022-11-25 18:29:22,777 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 168 selfloop transitions, 126 changer transitions 116/410 dead transitions. [2022-11-25 18:29:22,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 410 transitions, 3850 flow [2022-11-25 18:29:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 18:29:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-25 18:29:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3816 transitions. [2022-11-25 18:29:22,786 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3154240370309142 [2022-11-25 18:29:22,787 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3816 transitions. [2022-11-25 18:29:22,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3816 transitions. [2022-11-25 18:29:22,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:22,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3816 transitions. [2022-11-25 18:29:22,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 82.95652173913044) internal successors, (3816), 46 states have internal predecessors, (3816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:22,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 263.0) internal successors, (12361), 47 states have internal predecessors, (12361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:22,809 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 263.0) internal successors, (12361), 47 states have internal predecessors, (12361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:22,809 INFO L175 Difference]: Start difference. First operand has 100 places, 93 transitions, 1109 flow. Second operand 46 states and 3816 transitions. [2022-11-25 18:29:22,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 410 transitions, 3850 flow [2022-11-25 18:29:22,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 410 transitions, 3808 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-11-25 18:29:22,851 INFO L231 Difference]: Finished difference. Result has 152 places, 179 transitions, 2717 flow [2022-11-25 18:29:22,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2717, PETRI_PLACES=152, PETRI_TRANSITIONS=179} [2022-11-25 18:29:22,852 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2022-11-25 18:29:22,852 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 179 transitions, 2717 flow [2022-11-25 18:29:22,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:22,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:22,853 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:22,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:23,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:29:23,060 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:29:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:23,060 INFO L85 PathProgramCache]: Analyzing trace with hash 433071272, now seen corresponding path program 10 times [2022-11-25 18:29:23,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:23,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429687899] [2022-11-25 18:29:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:23,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429687899] [2022-11-25 18:29:24,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429687899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320440653] [2022-11-25 18:29:24,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:29:24,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:24,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:24,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:24,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:29:24,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:29:24,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:29:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 18:29:24,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:24,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 18:29:25,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:29:25,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:29:25,510 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:25,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2022-11-25 18:29:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:25,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:27,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:27,127 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 183 treesize of output 123 [2022-11-25 18:29:27,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:27,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 381 treesize of output 449 [2022-11-25 18:29:27,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:27,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 329 treesize of output 369 [2022-11-25 18:29:27,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:27,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 329 [2022-11-25 18:29:36,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:36,932 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 183 treesize of output 123 [2022-11-25 18:29:36,972 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-25 18:29:36,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 381 treesize of output 341 [2022-11-25 18:29:37,013 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-25 18:29:37,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 329 treesize of output 261 [2022-11-25 18:29:37,063 INFO L321 Elim1Store]: treesize reduction 108, result has 10.7 percent of original size [2022-11-25 18:29:37,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 221 [2022-11-25 18:29:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:37,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320440653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:37,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:37,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2022-11-25 18:29:37,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569089298] [2022-11-25 18:29:37,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:37,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 18:29:37,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:37,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 18:29:37,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1188, Unknown=2, NotChecked=0, Total=1482 [2022-11-25 18:29:40,131 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-25 18:29:40,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 179 transitions, 2717 flow. Second operand has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:40,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:40,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-25 18:29:40,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:03,966 INFO L130 PetriNetUnfolder]: 3331/6289 cut-off events. [2022-11-25 18:30:03,966 INFO L131 PetriNetUnfolder]: For 65354/65354 co-relation queries the response was YES. [2022-11-25 18:30:04,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30670 conditions, 6289 events. 3331/6289 cut-off events. For 65354/65354 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 46888 event pairs, 544 based on Foata normal form. 68/6357 useless extension candidates. Maximal degree in co-relation 29962. Up to 1786 conditions per place. [2022-11-25 18:30:04,024 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 252 selfloop transitions, 219 changer transitions 122/593 dead transitions. [2022-11-25 18:30:04,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 593 transitions, 8182 flow [2022-11-25 18:30:04,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-25 18:30:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-11-25 18:30:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4230 transitions. [2022-11-25 18:30:04,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31536569000223663 [2022-11-25 18:30:04,035 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4230 transitions. [2022-11-25 18:30:04,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4230 transitions. [2022-11-25 18:30:04,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:04,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4230 transitions. [2022-11-25 18:30:04,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 82.94117647058823) internal successors, (4230), 51 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:04,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 263.0) internal successors, (13676), 52 states have internal predecessors, (13676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:04,066 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 263.0) internal successors, (13676), 52 states have internal predecessors, (13676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:04,066 INFO L175 Difference]: Start difference. First operand has 152 places, 179 transitions, 2717 flow. Second operand 51 states and 4230 transitions. [2022-11-25 18:30:04,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 593 transitions, 8182 flow [2022-11-25 18:30:04,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 593 transitions, 7332 flow, removed 391 selfloop flow, removed 14 redundant places. [2022-11-25 18:30:04,612 INFO L231 Difference]: Finished difference. Result has 215 places, 321 transitions, 5528 flow [2022-11-25 18:30:04,612 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=2310, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=5528, PETRI_PLACES=215, PETRI_TRANSITIONS=321} [2022-11-25 18:30:04,614 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 195 predicate places. [2022-11-25 18:30:04,614 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 321 transitions, 5528 flow [2022-11-25 18:30:04,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 77.53846153846153) internal successors, (3024), 39 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:04,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:04,615 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:04,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:04,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:04,823 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:30:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:04,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1926292904, now seen corresponding path program 11 times [2022-11-25 18:30:04,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:04,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688787084] [2022-11-25 18:30:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:04,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:07,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688787084] [2022-11-25 18:30:07,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688787084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173881250] [2022-11-25 18:30:07,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:30:07,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:07,988 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:08,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:30:08,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:30:08,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-25 18:30:08,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:08,401 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 13 treesize of output 9 [2022-11-25 18:30:08,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:30:08,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:30:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:30:09,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:30:09,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:30:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:30:09,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:30:09,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:30:09,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:30:09,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:30:09,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:30:09,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:30:09,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 27 [2022-11-25 18:30:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:09,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:14,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:30:14,232 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 181 treesize of output 121 [2022-11-25 18:30:14,365 INFO L321 Elim1Store]: treesize reduction 76, result has 51.6 percent of original size [2022-11-25 18:30:14,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 403 [2022-11-25 18:30:14,499 INFO L321 Elim1Store]: treesize reduction 76, result has 51.6 percent of original size [2022-11-25 18:30:14,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 323 treesize of output 327 [2022-11-25 18:30:14,635 INFO L321 Elim1Store]: treesize reduction 76, result has 51.6 percent of original size [2022-11-25 18:30:14,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 247 treesize of output 289 [2022-11-25 18:30:19,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:30:19,600 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 181 treesize of output 121 [2022-11-25 18:30:19,677 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 18:30:19,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 335 [2022-11-25 18:30:19,748 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 18:30:19,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 323 treesize of output 259 [2022-11-25 18:30:19,822 INFO L321 Elim1Store]: treesize reduction 144, result has 8.3 percent of original size [2022-11-25 18:30:19,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 247 treesize of output 221 [2022-11-25 18:30:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:20,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173881250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:20,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:20,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-11-25 18:30:20,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761652033] [2022-11-25 18:30:20,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:20,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-25 18:30:20,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:20,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-25 18:30:20,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1368, Unknown=5, NotChecked=0, Total=1560 [2022-11-25 18:30:27,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 263 [2022-11-25 18:30:27,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 321 transitions, 5528 flow. Second operand has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:27,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:27,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 263 [2022-11-25 18:30:27,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:54,830 WARN L233 SmtUtils]: Spent 12.29s on a formula simplification. DAG size of input: 176 DAG size of output: 174 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:31:09,118 INFO L130 PetriNetUnfolder]: 3401/6465 cut-off events. [2022-11-25 18:31:09,118 INFO L131 PetriNetUnfolder]: For 99753/99753 co-relation queries the response was YES. [2022-11-25 18:31:09,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33777 conditions, 6465 events. 3401/6465 cut-off events. For 99753/99753 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 45836 event pairs, 1398 based on Foata normal form. 25/6490 useless extension candidates. Maximal degree in co-relation 31864. Up to 5062 conditions per place. [2022-11-25 18:31:09,182 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 325 selfloop transitions, 58 changer transitions 119/502 dead transitions. [2022-11-25 18:31:09,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 502 transitions, 7491 flow [2022-11-25 18:31:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 18:31:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 18:31:09,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2730 transitions. [2022-11-25 18:31:09,190 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.31455236778430695 [2022-11-25 18:31:09,190 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2730 transitions. [2022-11-25 18:31:09,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2730 transitions. [2022-11-25 18:31:09,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:09,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2730 transitions. [2022-11-25 18:31:09,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 82.72727272727273) internal successors, (2730), 33 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:09,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 263.0) internal successors, (8942), 34 states have internal predecessors, (8942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:09,210 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 263.0) internal successors, (8942), 34 states have internal predecessors, (8942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:09,211 INFO L175 Difference]: Start difference. First operand has 215 places, 321 transitions, 5528 flow. Second operand 33 states and 2730 transitions. [2022-11-25 18:31:09,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 502 transitions, 7491 flow [2022-11-25 18:31:10,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 502 transitions, 6579 flow, removed 414 selfloop flow, removed 17 redundant places. [2022-11-25 18:31:10,214 INFO L231 Difference]: Finished difference. Result has 244 places, 330 transitions, 5025 flow [2022-11-25 18:31:10,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5025, PETRI_PLACES=244, PETRI_TRANSITIONS=330} [2022-11-25 18:31:10,216 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 224 predicate places. [2022-11-25 18:31:10,216 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 330 transitions, 5025 flow [2022-11-25 18:31:10,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 77.525) internal successors, (3101), 40 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:10,217 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:10,217 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:10,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:10,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:10,424 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:31:10,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:10,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1374522864, now seen corresponding path program 12 times [2022-11-25 18:31:10,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:10,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554004423] [2022-11-25 18:31:10,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:10,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:12,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554004423] [2022-11-25 18:31:12,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554004423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:31:12,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986466143] [2022-11-25 18:31:12,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:31:12,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:12,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:31:12,981 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:31:12,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:31:13,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:31:13,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:31:13,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 18:31:13,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:14,307 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:31:14,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 18 [2022-11-25 18:31:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:14,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:15,491 INFO L321 Elim1Store]: treesize reduction 64, result has 56.5 percent of original size [2022-11-25 18:31:15,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 292 treesize of output 256 [2022-11-25 18:31:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:16,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986466143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:16,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:31:16,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-11-25 18:31:16,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354746685] [2022-11-25 18:31:16,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:16,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-25 18:31:16,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-25 18:31:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 18:31:20,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 263 [2022-11-25 18:31:20,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 330 transitions, 5025 flow. Second operand has 37 states, 37 states have (on average 96.64864864864865) internal successors, (3576), 37 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:20,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:20,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 263 [2022-11-25 18:31:20,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:27,353 INFO L130 PetriNetUnfolder]: 3563/6770 cut-off events. [2022-11-25 18:31:27,353 INFO L131 PetriNetUnfolder]: For 105174/105174 co-relation queries the response was YES. [2022-11-25 18:31:27,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34271 conditions, 6770 events. 3563/6770 cut-off events. For 105174/105174 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 48842 event pairs, 1342 based on Foata normal form. 5/6775 useless extension candidates. Maximal degree in co-relation 34132. Up to 5461 conditions per place. [2022-11-25 18:31:27,421 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 322 selfloop transitions, 74 changer transitions 76/472 dead transitions. [2022-11-25 18:31:27,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 472 transitions, 6950 flow [2022-11-25 18:31:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 18:31:27,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 18:31:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2743 transitions. [2022-11-25 18:31:27,429 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3862836220250669 [2022-11-25 18:31:27,430 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2743 transitions. [2022-11-25 18:31:27,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2743 transitions. [2022-11-25 18:31:27,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:27,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2743 transitions. [2022-11-25 18:31:27,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 101.5925925925926) internal successors, (2743), 27 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:27,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:27,453 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:27,453 INFO L175 Difference]: Start difference. First operand has 244 places, 330 transitions, 5025 flow. Second operand 27 states and 2743 transitions. [2022-11-25 18:31:27,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 472 transitions, 6950 flow [2022-11-25 18:31:28,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 472 transitions, 6790 flow, removed 50 selfloop flow, removed 16 redundant places. [2022-11-25 18:31:28,471 INFO L231 Difference]: Finished difference. Result has 258 places, 352 transitions, 5649 flow [2022-11-25 18:31:28,472 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=4873, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5649, PETRI_PLACES=258, PETRI_TRANSITIONS=352} [2022-11-25 18:31:28,472 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 238 predicate places. [2022-11-25 18:31:28,473 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 352 transitions, 5649 flow [2022-11-25 18:31:28,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 96.64864864864865) internal successors, (3576), 37 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:28,473 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:28,474 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:28,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 18:31:28,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 18:31:28,674 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:31:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash 583779262, now seen corresponding path program 13 times [2022-11-25 18:31:28,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:28,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112279368] [2022-11-25 18:31:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:28,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:35,242 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:35,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112279368] [2022-11-25 18:31:35,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112279368] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:31:35,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358759895] [2022-11-25 18:31:35,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:31:35,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:35,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:31:35,246 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:31:35,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:31:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:35,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 18:31:35,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:36,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:31:36,198 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 48 treesize of output 14 [2022-11-25 18:31:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:31:36,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:36,776 INFO L321 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-11-25 18:31:36,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 226 treesize of output 196 [2022-11-25 18:31:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:31:37,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358759895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:37,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:31:37,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 5] total 29 [2022-11-25 18:31:37,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016979964] [2022-11-25 18:31:37,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:37,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 18:31:37,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:37,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 18:31:37,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-11-25 18:31:43,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 263 [2022-11-25 18:31:43,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 352 transitions, 5649 flow. Second operand has 31 states, 31 states have (on average 97.90322580645162) internal successors, (3035), 31 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:43,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:43,546 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 263 [2022-11-25 18:31:43,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:51,827 INFO L130 PetriNetUnfolder]: 3935/7448 cut-off events. [2022-11-25 18:31:51,827 INFO L131 PetriNetUnfolder]: For 132580/132580 co-relation queries the response was YES. [2022-11-25 18:31:51,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38434 conditions, 7448 events. 3935/7448 cut-off events. For 132580/132580 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 54626 event pairs, 1156 based on Foata normal form. 17/7465 useless extension candidates. Maximal degree in co-relation 37891. Up to 4478 conditions per place. [2022-11-25 18:31:51,893 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 302 selfloop transitions, 138 changer transitions 92/532 dead transitions. [2022-11-25 18:31:51,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 532 transitions, 8136 flow [2022-11-25 18:31:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 18:31:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 18:31:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3171 transitions. [2022-11-25 18:31:51,900 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38893658775910706 [2022-11-25 18:31:51,901 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3171 transitions. [2022-11-25 18:31:51,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3171 transitions. [2022-11-25 18:31:51,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:51,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3171 transitions. [2022-11-25 18:31:51,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 102.29032258064517) internal successors, (3171), 31 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:51,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 263.0) internal successors, (8416), 32 states have internal predecessors, (8416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:51,921 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 263.0) internal successors, (8416), 32 states have internal predecessors, (8416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:51,921 INFO L175 Difference]: Start difference. First operand has 258 places, 352 transitions, 5649 flow. Second operand 31 states and 3171 transitions. [2022-11-25 18:31:51,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 532 transitions, 8136 flow [2022-11-25 18:31:52,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 532 transitions, 7763 flow, removed 162 selfloop flow, removed 17 redundant places. [2022-11-25 18:31:52,936 INFO L231 Difference]: Finished difference. Result has 276 places, 383 transitions, 6388 flow [2022-11-25 18:31:52,936 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=5328, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=6388, PETRI_PLACES=276, PETRI_TRANSITIONS=383} [2022-11-25 18:31:52,937 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2022-11-25 18:31:52,937 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 383 transitions, 6388 flow [2022-11-25 18:31:52,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 97.90322580645162) internal successors, (3035), 31 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:31:52,937 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:52,938 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:52,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:53,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:31:53,138 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:31:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:53,139 INFO L85 PathProgramCache]: Analyzing trace with hash 958818431, now seen corresponding path program 14 times [2022-11-25 18:31:53,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:53,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096747614] [2022-11-25 18:31:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:53,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:57,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096747614] [2022-11-25 18:31:57,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096747614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:31:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142865977] [2022-11-25 18:31:57,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:31:57,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:31:57,096 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:31:57,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:31:57,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:31:57,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:31:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:31:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:57,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:31:57,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2022-11-25 18:31:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:31:58,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:59,088 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-11-25 18:31:59,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 274 treesize of output 276 [2022-11-25 18:32:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:32:01,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142865977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:32:01,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:32:01,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 32 [2022-11-25 18:32:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130443807] [2022-11-25 18:32:01,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:01,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 18:32:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 18:32:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 18:32:06,917 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 263 [2022-11-25 18:32:06,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 383 transitions, 6388 flow. Second operand has 34 states, 34 states have (on average 97.79411764705883) internal successors, (3325), 34 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:06,919 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:06,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 263 [2022-11-25 18:32:06,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:15,665 INFO L130 PetriNetUnfolder]: 6155/11486 cut-off events. [2022-11-25 18:32:15,665 INFO L131 PetriNetUnfolder]: For 258303/258303 co-relation queries the response was YES. [2022-11-25 18:32:15,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62386 conditions, 11486 events. 6155/11486 cut-off events. For 258303/258303 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 90262 event pairs, 1346 based on Foata normal form. 50/11536 useless extension candidates. Maximal degree in co-relation 61524. Up to 3957 conditions per place. [2022-11-25 18:32:15,772 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 340 selfloop transitions, 328 changer transitions 134/802 dead transitions. [2022-11-25 18:32:15,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 802 transitions, 13000 flow [2022-11-25 18:32:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 18:32:15,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-25 18:32:15,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4030 transitions. [2022-11-25 18:32:15,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3929024081115336 [2022-11-25 18:32:15,779 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4030 transitions. [2022-11-25 18:32:15,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4030 transitions. [2022-11-25 18:32:15,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:15,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4030 transitions. [2022-11-25 18:32:15,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 103.33333333333333) internal successors, (4030), 39 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:15,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 263.0) internal successors, (10520), 40 states have internal predecessors, (10520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:15,799 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 263.0) internal successors, (10520), 40 states have internal predecessors, (10520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:15,800 INFO L175 Difference]: Start difference. First operand has 276 places, 383 transitions, 6388 flow. Second operand 39 states and 4030 transitions. [2022-11-25 18:32:15,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 802 transitions, 13000 flow [2022-11-25 18:32:17,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 802 transitions, 12237 flow, removed 256 selfloop flow, removed 24 redundant places. [2022-11-25 18:32:17,602 INFO L231 Difference]: Finished difference. Result has 308 places, 546 transitions, 10143 flow [2022-11-25 18:32:17,602 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=5866, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10143, PETRI_PLACES=308, PETRI_TRANSITIONS=546} [2022-11-25 18:32:17,603 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 288 predicate places. [2022-11-25 18:32:17,603 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 546 transitions, 10143 flow [2022-11-25 18:32:17,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 97.79411764705883) internal successors, (3325), 34 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:17,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:17,604 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:17,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 18:32:17,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:32:17,811 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:32:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1451017431, now seen corresponding path program 15 times [2022-11-25 18:32:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:17,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337666101] [2022-11-25 18:32:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:17,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:21,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:21,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337666101] [2022-11-25 18:32:21,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337666101] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:32:21,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826483989] [2022-11-25 18:32:21,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:32:21,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:21,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:32:21,822 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:32:21,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 18:32:22,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:32:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:32:22,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:32:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:22,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:32:22,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2022-11-25 18:32:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 18:32:22,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:32:23,655 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-11-25 18:32:23,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 274 treesize of output 276 [2022-11-25 18:32:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:32:25,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826483989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:32:25,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:32:25,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 31 [2022-11-25 18:32:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987206729] [2022-11-25 18:32:25,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:25,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 18:32:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:25,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 18:32:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 18:32:30,090 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 263 [2022-11-25 18:32:30,092 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 546 transitions, 10143 flow. Second operand has 33 states, 33 states have (on average 97.81818181818181) internal successors, (3228), 33 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:30,092 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:30,092 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 263 [2022-11-25 18:32:30,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:41,758 INFO L130 PetriNetUnfolder]: 7801/14521 cut-off events. [2022-11-25 18:32:41,759 INFO L131 PetriNetUnfolder]: For 489962/489962 co-relation queries the response was YES. [2022-11-25 18:32:41,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89456 conditions, 14521 events. 7801/14521 cut-off events. For 489962/489962 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 119626 event pairs, 1726 based on Foata normal form. 56/14577 useless extension candidates. Maximal degree in co-relation 87280. Up to 6239 conditions per place. [2022-11-25 18:32:41,952 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 422 selfloop transitions, 355 changer transitions 145/922 dead transitions. [2022-11-25 18:32:41,952 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 922 transitions, 16835 flow [2022-11-25 18:32:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 18:32:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-25 18:32:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4147 transitions. [2022-11-25 18:32:41,962 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3942015209125475 [2022-11-25 18:32:41,962 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4147 transitions. [2022-11-25 18:32:41,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4147 transitions. [2022-11-25 18:32:41,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:41,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4147 transitions. [2022-11-25 18:32:41,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 103.675) internal successors, (4147), 40 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:41,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 263.0) internal successors, (10783), 41 states have internal predecessors, (10783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:41,989 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 263.0) internal successors, (10783), 41 states have internal predecessors, (10783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:41,990 INFO L175 Difference]: Start difference. First operand has 308 places, 546 transitions, 10143 flow. Second operand 40 states and 4147 transitions. [2022-11-25 18:32:41,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 922 transitions, 16835 flow [2022-11-25 18:32:45,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 922 transitions, 15283 flow, removed 689 selfloop flow, removed 17 redundant places. [2022-11-25 18:32:45,132 INFO L231 Difference]: Finished difference. Result has 352 places, 668 transitions, 12995 flow [2022-11-25 18:32:45,132 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=9076, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=12995, PETRI_PLACES=352, PETRI_TRANSITIONS=668} [2022-11-25 18:32:45,132 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 332 predicate places. [2022-11-25 18:32:45,133 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 668 transitions, 12995 flow [2022-11-25 18:32:45,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 97.81818181818181) internal successors, (3228), 33 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:45,133 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:45,134 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:45,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:45,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:32:45,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:32:45,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:45,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1718022998, now seen corresponding path program 16 times [2022-11-25 18:32:45,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:45,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682522755] [2022-11-25 18:32:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:45,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:47,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682522755] [2022-11-25 18:32:47,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682522755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:32:47,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598908669] [2022-11-25 18:32:47,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:32:47,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:47,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:32:47,624 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:32:47,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 18:32:47,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:32:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:32:47,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-25 18:32:47,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:48,721 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:32:48,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 18 [2022-11-25 18:32:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:48,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:32:49,779 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-11-25 18:32:49,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 298 treesize of output 300 [2022-11-25 18:32:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:53,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598908669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:32:53,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:32:53,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 41 [2022-11-25 18:32:53,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455192621] [2022-11-25 18:32:53,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:53,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 18:32:53,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:53,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 18:32:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 18:32:56,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 263 [2022-11-25 18:32:56,151 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 668 transitions, 12995 flow. Second operand has 43 states, 43 states have (on average 96.55813953488372) internal successors, (4152), 43 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:32:56,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:56,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 263 [2022-11-25 18:32:56,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:33:40,157 INFO L130 PetriNetUnfolder]: 15420/29419 cut-off events. [2022-11-25 18:33:40,157 INFO L131 PetriNetUnfolder]: For 1536078/1536078 co-relation queries the response was YES. [2022-11-25 18:33:40,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194613 conditions, 29419 events. 15420/29419 cut-off events. For 1536078/1536078 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 273105 event pairs, 1972 based on Foata normal form. 1236/30655 useless extension candidates. Maximal degree in co-relation 193045. Up to 6366 conditions per place. [2022-11-25 18:33:40,642 INFO L137 encePairwiseOnDemand]: 255/263 looper letters, 822 selfloop transitions, 1092 changer transitions 425/2339 dead transitions. [2022-11-25 18:33:40,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 2339 transitions, 45697 flow [2022-11-25 18:33:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-11-25 18:33:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2022-11-25 18:33:40,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 16678 transitions. [2022-11-25 18:33:40,665 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3914472140074168 [2022-11-25 18:33:40,665 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 16678 transitions. [2022-11-25 18:33:40,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 16678 transitions. [2022-11-25 18:33:40,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:33:40,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 16678 transitions. [2022-11-25 18:33:40,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 102.95061728395062) internal successors, (16678), 162 states have internal predecessors, (16678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:40,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 263.0) internal successors, (42869), 163 states have internal predecessors, (42869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:40,766 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 263.0) internal successors, (42869), 163 states have internal predecessors, (42869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:40,766 INFO L175 Difference]: Start difference. First operand has 352 places, 668 transitions, 12995 flow. Second operand 162 states and 16678 transitions. [2022-11-25 18:33:40,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 2339 transitions, 45697 flow [2022-11-25 18:33:50,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2339 transitions, 42694 flow, removed 1455 selfloop flow, removed 22 redundant places. [2022-11-25 18:33:50,426 INFO L231 Difference]: Finished difference. Result has 572 places, 1378 transitions, 32766 flow [2022-11-25 18:33:50,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=11341, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=32766, PETRI_PLACES=572, PETRI_TRANSITIONS=1378} [2022-11-25 18:33:50,428 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 552 predicate places. [2022-11-25 18:33:50,428 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1378 transitions, 32766 flow [2022-11-25 18:33:50,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 96.55813953488372) internal successors, (4152), 43 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:33:50,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:33:50,429 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:50,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-25 18:33:50,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:33:50,635 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:33:50,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:50,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1592224344, now seen corresponding path program 17 times [2022-11-25 18:33:50,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:33:50,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181612163] [2022-11-25 18:33:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:50,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:33:50,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:33:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:33:52,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:33:52,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181612163] [2022-11-25 18:33:52,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181612163] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:33:52,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744402133] [2022-11-25 18:33:52,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:33:52,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:33:52,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:33:52,874 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:33:52,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 18:33:53,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:33:53,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:33:53,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:33:53,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:53,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:33:53,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 18 [2022-11-25 18:33:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:33:53,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:33:54,412 INFO L321 Elim1Store]: treesize reduction 26, result has 82.3 percent of original size [2022-11-25 18:33:54,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 274 treesize of output 276 [2022-11-25 18:33:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-25 18:33:56,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744402133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:33:56,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:33:56,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 32 [2022-11-25 18:33:56,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084992307] [2022-11-25 18:33:56,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:33:56,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 18:33:56,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:33:56,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 18:33:56,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 18:34:00,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 263 [2022-11-25 18:34:00,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1378 transitions, 32766 flow. Second operand has 34 states, 34 states have (on average 97.8529411764706) internal successors, (3327), 34 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:00,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:00,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 263 [2022-11-25 18:34:00,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:34:26,686 INFO L130 PetriNetUnfolder]: 15378/29234 cut-off events. [2022-11-25 18:34:26,687 INFO L131 PetriNetUnfolder]: For 1806251/1806251 co-relation queries the response was YES. [2022-11-25 18:34:27,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206927 conditions, 29234 events. 15378/29234 cut-off events. For 1806251/1806251 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 270465 event pairs, 6450 based on Foata normal form. 4/29238 useless extension candidates. Maximal degree in co-relation 205374. Up to 23526 conditions per place. [2022-11-25 18:34:27,403 INFO L137 encePairwiseOnDemand]: 256/263 looper letters, 1224 selfloop transitions, 235 changer transitions 106/1565 dead transitions. [2022-11-25 18:34:27,403 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1565 transitions, 37448 flow [2022-11-25 18:34:27,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 18:34:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-25 18:34:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3288 transitions. [2022-11-25 18:34:27,407 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3906844106463878 [2022-11-25 18:34:27,408 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3288 transitions. [2022-11-25 18:34:27,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3288 transitions. [2022-11-25 18:34:27,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:34:27,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3288 transitions. [2022-11-25 18:34:27,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 102.75) internal successors, (3288), 32 states have internal predecessors, (3288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:27,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 263.0) internal successors, (8679), 33 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:27,422 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 263.0) internal successors, (8679), 33 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:27,422 INFO L175 Difference]: Start difference. First operand has 572 places, 1378 transitions, 32766 flow. Second operand 32 states and 3288 transitions. [2022-11-25 18:34:27,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1565 transitions, 37448 flow [2022-11-25 18:34:55,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1565 transitions, 28269 flow, removed 4380 selfloop flow, removed 46 redundant places. [2022-11-25 18:34:55,539 INFO L231 Difference]: Finished difference. Result has 561 places, 1398 transitions, 24761 flow [2022-11-25 18:34:55,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=23648, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=24761, PETRI_PLACES=561, PETRI_TRANSITIONS=1398} [2022-11-25 18:34:55,541 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 541 predicate places. [2022-11-25 18:34:55,541 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 1398 transitions, 24761 flow [2022-11-25 18:34:55,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 97.8529411764706) internal successors, (3327), 34 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:55,541 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:34:55,541 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:55,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:55,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:55,742 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 18:34:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2070517657, now seen corresponding path program 18 times [2022-11-25 18:34:55,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:55,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154791448] [2022-11-25 18:34:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:55,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:34:55,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154791448] [2022-11-25 18:34:55,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154791448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:55,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350385821] [2022-11-25 18:34:55,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:34:55,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:55,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:55,976 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:56,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2d960be-4523-42a2-804e-82f6e10c86f8/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 18:34:56,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:34:56,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:34:56,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:56,558 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:34:56,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 128 [2022-11-25 18:34:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:34:56,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:57,075 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-11-25 18:34:57,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 159 [2022-11-25 18:34:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:34:57,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350385821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:57,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:34:57,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 15 [2022-11-25 18:34:57,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500177364] [2022-11-25 18:34:57,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:57,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:34:57,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:34:57,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:34:57,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 263 [2022-11-25 18:34:57,473 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 1398 transitions, 24761 flow. Second operand has 16 states, 16 states have (on average 110.0) internal successors, (1760), 16 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:57,473 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:34:57,473 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 263 [2022-11-25 18:34:57,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand