./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.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_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/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_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/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_a0c35e73-56cf-42d0-9e36-b263e95eab83/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 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 --- 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 17:25:38,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:25:38,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:25:39,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:25:39,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:25:39,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:25:39,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:25:39,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:25:39,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:25:39,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:25:39,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:25:39,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:25:39,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:25:39,075 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:25:39,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:25:39,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:25:39,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:25:39,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:25:39,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:25:39,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:25:39,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:25:39,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:25:39,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:25:39,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:25:39,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:25:39,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:25:39,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:25:39,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:25:39,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:25:39,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:25:39,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:25:39,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:25:39,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:25:39,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:25:39,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:25:39,130 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:25:39,131 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:25:39,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:25:39,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:25:39,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:25:39,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:25:39,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:25:39,190 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:25:39,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:25:39,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:25:39,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:25:39,193 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:25:39,194 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:25:39,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:25:39,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:25:39,198 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:25:39,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:25:39,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:25:39,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:25:39,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:25:39,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:25:39,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:25:39,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:25:39,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:25:39,203 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:25:39,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:25:39,204 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:25:39,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:25:39,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:25:39,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:25:39,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:25:39,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:25:39,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:25:39,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:25:39,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:25:39,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:25:39,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:25:39,208 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:25:39,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:25:39,209 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:25:39,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:25:39,210 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_a0c35e73-56cf-42d0-9e36-b263e95eab83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3697d9128f1f55a146432bb6e854f5639b64b16acb09c5233c8611aa24537748 [2022-11-25 17:25:39,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:25:39,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:25:39,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:25:39,584 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:25:39,584 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:25:39,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-25 17:25:42,911 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:25:43,141 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:25:43,142 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-25 17:25:43,150 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/data/734fd8b34/d2a53d27d60348b6ba00a6865a9295cb/FLAG6e67cb5a0 [2022-11-25 17:25:43,167 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/data/734fd8b34/d2a53d27d60348b6ba00a6865a9295cb [2022-11-25 17:25:43,170 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:25:43,172 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:25:43,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:25:43,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:25:43,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:25:43,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3ec72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43, skipping insertion in model container [2022-11-25 17:25:43,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:25:43,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:25:43,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:25:43,393 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:25:43,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:25:43,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:25:43,408 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_a0c35e73-56cf-42d0-9e36-b263e95eab83/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-11-25 17:25:43,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:25:43,426 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:25:43,445 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:25:43,446 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:25:43,447 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 17:25:43,448 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 17:25:43,454 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_a0c35e73-56cf-42d0-9e36-b263e95eab83/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2022-11-25 17:25:43,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:25:43,474 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:25:43,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43 WrapperNode [2022-11-25 17:25:43,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:25:43,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:25:43,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:25:43,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:25:43,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,523 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2022-11-25 17:25:43,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:25:43,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:25:43,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:25:43,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:25:43,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,577 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:25:43,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:25:43,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:25:43,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:25:43,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (1/1) ... [2022-11-25 17:25:43,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:25:43,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:43,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:25:43,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:25:43,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:25:43,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 17:25:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 17:25:43,688 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 17:25:43,688 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 17:25:43,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:25:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:25:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:25:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 17:25:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 17:25:43,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:25:43,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:25:43,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:25:43,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:25:43,692 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 17:25:43,849 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:25:43,852 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:25:44,116 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:25:44,185 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:25:44,186 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:25:44,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:25:44 BoogieIcfgContainer [2022-11-25 17:25:44,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:25:44,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:25:44,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:25:44,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:25:44,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:25:43" (1/3) ... [2022-11-25 17:25:44,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346acd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:25:44, skipping insertion in model container [2022-11-25 17:25:44,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:25:43" (2/3) ... [2022-11-25 17:25:44,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@346acd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:25:44, skipping insertion in model container [2022-11-25 17:25:44,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:25:44" (3/3) ... [2022-11-25 17:25:44,211 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2022-11-25 17:25:44,223 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-25 17:25:44,235 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:25:44,236 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:25:44,236 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:25:44,344 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:25:44,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-11-25 17:25:44,444 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-11-25 17:25:44,445 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:25:44,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 43 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-25 17:25:44,451 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-11-25 17:25:44,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-11-25 17:25:44,462 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:25:44,481 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 74 places, 73 transitions, 158 flow [2022-11-25 17:25:44,485 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 74 places, 73 transitions, 158 flow [2022-11-25 17:25:44,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 73 transitions, 158 flow [2022-11-25 17:25:44,580 INFO L130 PetriNetUnfolder]: 6/73 cut-off events. [2022-11-25 17:25:44,580 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:25:44,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 6/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2022-11-25 17:25:44,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2022-11-25 17:25:47,617 INFO L134 LiptonReduction]: Checked pairs total: 449 [2022-11-25 17:25:47,618 INFO L136 LiptonReduction]: Total number of compositions: 70 [2022-11-25 17:25:47,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:25:47,661 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;@28dae628, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:25:47,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-25 17:25:47,672 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2022-11-25 17:25:47,672 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:25:47,672 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:47,677 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:47,678 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 17:25:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1532085252, now seen corresponding path program 1 times [2022-11-25 17:25:47,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:47,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050514195] [2022-11-25 17:25:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:47,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:48,221 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 17:25:48,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:48,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050514195] [2022-11-25 17:25:48,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050514195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:48,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:48,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:25:48,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702461092] [2022-11-25 17:25:48,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:48,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:25:48,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:25:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:25:48,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 154 [2022-11-25 17:25:48,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 17:25:48,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:48,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 154 [2022-11-25 17:25:48,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:48,394 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2022-11-25 17:25:48,394 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 17:25:48,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 250 event pairs, 23 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2022-11-25 17:25:48,397 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2022-11-25 17:25:48,398 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2022-11-25 17:25:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:25:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:25:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 293 transitions. [2022-11-25 17:25:48,421 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47564935064935066 [2022-11-25 17:25:48,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 293 transitions. [2022-11-25 17:25:48,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 293 transitions. [2022-11-25 17:25:48,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:48,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 293 transitions. [2022-11-25 17:25:48,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 17:25:48,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:25:48,443 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:25:48,445 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 293 transitions. [2022-11-25 17:25:48,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2022-11-25 17:25:48,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 17:25:48,452 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2022-11-25 17:25:48,454 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2022-11-25 17:25:48,458 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2022-11-25 17:25:48,459 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2022-11-25 17:25:48,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states 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 17:25:48,459 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:48,460 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:48,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:25:48,461 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 17:25:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -814143578, now seen corresponding path program 1 times [2022-11-25 17:25:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:48,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80342255] [2022-11-25 17:25:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:48,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:48,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:48,735 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 17:25:48,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:48,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80342255] [2022-11-25 17:25:48,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80342255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:48,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:25:48,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:25:48,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393937018] [2022-11-25 17:25:48,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:25:48,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:25:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:25:48,795 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 154 [2022-11-25 17:25:48,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 17:25:48,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:48,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 154 [2022-11-25 17:25:48,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:49,017 INFO L130 PetriNetUnfolder]: 78/153 cut-off events. [2022-11-25 17:25:49,018 INFO L131 PetriNetUnfolder]: For 59/59 co-relation queries the response was YES. [2022-11-25 17:25:49,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 153 events. 78/153 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 471 event pairs, 33 based on Foata normal form. 8/131 useless extension candidates. Maximal degree in co-relation 89. Up to 93 conditions per place. [2022-11-25 17:25:49,024 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2022-11-25 17:25:49,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 37 transitions, 184 flow [2022-11-25 17:25:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:25:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:25:49,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 367 transitions. [2022-11-25 17:25:49,034 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4766233766233766 [2022-11-25 17:25:49,037 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 367 transitions. [2022-11-25 17:25:49,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 367 transitions. [2022-11-25 17:25:49,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:49,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 367 transitions. [2022-11-25 17:25:49,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.4) internal successors, (367), 5 states have internal predecessors, (367), 0 states have call successors, (0), 0 states 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 17:25:49,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 17:25:49,050 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 154.0) internal successors, (924), 6 states have internal predecessors, (924), 0 states have call successors, (0), 0 states 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 17:25:49,051 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 5 states and 367 transitions. [2022-11-25 17:25:49,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 37 transitions, 184 flow [2022-11-25 17:25:49,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 173 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 17:25:49,053 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 68 flow [2022-11-25 17:25:49,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2022-11-25 17:25:49,055 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-11-25 17:25:49,055 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 68 flow [2022-11-25 17:25:49,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.8) internal successors, (344), 5 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 17:25:49,057 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:49,057 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:49,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:25:49,057 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 17:25:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:49,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1109209958, now seen corresponding path program 2 times [2022-11-25 17:25:49,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:49,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064989761] [2022-11-25 17:25:49,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:49,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:49,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:49,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064989761] [2022-11-25 17:25:49,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064989761] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:49,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766282970] [2022-11-25 17:25:49,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:25:49,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:49,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:49,307 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:49,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:25:49,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:25:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:49,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:25:49,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:49,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:25:49,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766282970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:25:49,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:25:49,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-25 17:25:49,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128635742] [2022-11-25 17:25:49,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:49,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:25:49,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:49,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:25:49,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:25:49,602 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 154 [2022-11-25 17:25:49,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 17:25:49,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:49,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 154 [2022-11-25 17:25:49,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:49,661 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2022-11-25 17:25:49,662 INFO L131 PetriNetUnfolder]: For 91/113 co-relation queries the response was YES. [2022-11-25 17:25:49,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 94 events. 51/94 cut-off events. For 91/113 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 225 event pairs, 24 based on Foata normal form. 20/104 useless extension candidates. Maximal degree in co-relation 145. Up to 73 conditions per place. [2022-11-25 17:25:49,663 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2022-11-25 17:25:49,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 129 flow [2022-11-25 17:25:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:25:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:25:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 289 transitions. [2022-11-25 17:25:49,666 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46915584415584416 [2022-11-25 17:25:49,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 289 transitions. [2022-11-25 17:25:49,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 289 transitions. [2022-11-25 17:25:49,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:49,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 289 transitions. [2022-11-25 17:25:49,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.25) internal successors, (289), 4 states have internal predecessors, (289), 0 states have call successors, (0), 0 states 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 17:25:49,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:25:49,670 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:25:49,675 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 68 flow. Second operand 4 states and 289 transitions. [2022-11-25 17:25:49,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 129 flow [2022-11-25 17:25:49,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-25 17:25:49,678 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2022-11-25 17:25:49,678 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2022-11-25 17:25:49,679 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2022-11-25 17:25:49,679 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2022-11-25 17:25:49,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 17:25:49,680 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:49,680 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:49,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 17:25:49,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 17:25:49,900 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 17:25:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1627260304, now seen corresponding path program 1 times [2022-11-25 17:25:49,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:49,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451580121] [2022-11-25 17:25:49,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:50,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:50,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451580121] [2022-11-25 17:25:50,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451580121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:50,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522890764] [2022-11-25 17:25:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:50,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:50,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:50,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:25:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:25:50,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:50,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:50,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:50,757 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 17:25:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522890764] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:50,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:25:50,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 9 [2022-11-25 17:25:50,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866122301] [2022-11-25 17:25:50,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:25:50,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:25:50,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:50,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:25:50,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:25:50,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 154 [2022-11-25 17:25:50,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 17:25:50,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:50,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 154 [2022-11-25 17:25:50,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:50,892 INFO L130 PetriNetUnfolder]: 84/156 cut-off events. [2022-11-25 17:25:50,892 INFO L131 PetriNetUnfolder]: For 28/47 co-relation queries the response was YES. [2022-11-25 17:25:50,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 156 events. 84/156 cut-off events. For 28/47 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 487 event pairs, 6 based on Foata normal form. 20/135 useless extension candidates. Maximal degree in co-relation 147. Up to 61 conditions per place. [2022-11-25 17:25:50,894 INFO L137 encePairwiseOnDemand]: 150/154 looper letters, 28 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2022-11-25 17:25:50,894 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 200 flow [2022-11-25 17:25:50,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:25:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:25:50,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 315 transitions. [2022-11-25 17:25:50,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2022-11-25 17:25:50,897 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 315 transitions. [2022-11-25 17:25:50,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 315 transitions. [2022-11-25 17:25:50,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:50,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 315 transitions. [2022-11-25 17:25:50,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.75) internal successors, (315), 4 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 17:25:50,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:25:50,901 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 154.0) internal successors, (770), 5 states have internal predecessors, (770), 0 states have call successors, (0), 0 states 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 17:25:50,902 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 315 transitions. [2022-11-25 17:25:50,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 200 flow [2022-11-25 17:25:50,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 194 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:25:50,904 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2022-11-25 17:25:50,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2022-11-25 17:25:50,905 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2022-11-25 17:25:50,905 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2022-11-25 17:25:50,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.25) internal successors, (293), 4 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 17:25:50,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:50,906 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:50,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:51,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:51,113 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 17:25:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1121199798, now seen corresponding path program 2 times [2022-11-25 17:25:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:51,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995606312] [2022-11-25 17:25:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:51,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:51,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:51,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995606312] [2022-11-25 17:25:51,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995606312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:51,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051007186] [2022-11-25 17:25:51,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:25:51,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:51,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:51,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:51,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:25:51,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:25:51,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:51,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:25:51,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:51,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:25:51,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051007186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:51,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:51,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 17:25:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57461074] [2022-11-25 17:25:51,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:51,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:25:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:25:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:25:51,743 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 154 [2022-11-25 17:25:51,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 8 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 17:25:51,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:51,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 154 [2022-11-25 17:25:51,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:51,900 INFO L130 PetriNetUnfolder]: 132/239 cut-off events. [2022-11-25 17:25:51,901 INFO L131 PetriNetUnfolder]: For 230/244 co-relation queries the response was YES. [2022-11-25 17:25:51,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 239 events. 132/239 cut-off events. For 230/244 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 771 event pairs, 32 based on Foata normal form. 28/267 useless extension candidates. Maximal degree in co-relation 232. Up to 190 conditions per place. [2022-11-25 17:25:51,904 INFO L137 encePairwiseOnDemand]: 149/154 looper letters, 30 selfloop transitions, 10 changer transitions 0/41 dead transitions. [2022-11-25 17:25:51,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 259 flow [2022-11-25 17:25:51,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:25:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:25:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2022-11-25 17:25:51,907 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2022-11-25 17:25:51,908 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2022-11-25 17:25:51,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2022-11-25 17:25:51,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:51,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2022-11-25 17:25:51,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states 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 17:25:51,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states 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 17:25:51,913 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states 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 17:25:51,914 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 6 states and 429 transitions. [2022-11-25 17:25:51,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 259 flow [2022-11-25 17:25:51,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 259 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:25:51,921 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 183 flow [2022-11-25 17:25:51,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2022-11-25 17:25:51,925 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 13 predicate places. [2022-11-25 17:25:51,925 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 183 flow [2022-11-25 17:25:51,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states 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 17:25:51,926 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:51,926 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:51,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:52,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:52,133 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 17:25:52,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash 40956100, now seen corresponding path program 3 times [2022-11-25 17:25:52,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:52,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096638474] [2022-11-25 17:25:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:52,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:52,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096638474] [2022-11-25 17:25:52,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096638474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042024493] [2022-11-25 17:25:52,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:25:52,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:52,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:52,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:52,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:25:52,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:25:52,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:52,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:25:52,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:52,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:53,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042024493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:53,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:53,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-25 17:25:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138770420] [2022-11-25 17:25:53,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:53,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:25:53,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:53,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:25:53,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:25:53,222 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-11-25 17:25:53,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 183 flow. Second operand has 14 states, 14 states have (on average 65.14285714285714) internal successors, (912), 14 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 17:25:53,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:53,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-11-25 17:25:53,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:53,929 INFO L130 PetriNetUnfolder]: 283/509 cut-off events. [2022-11-25 17:25:53,930 INFO L131 PetriNetUnfolder]: For 922/922 co-relation queries the response was YES. [2022-11-25 17:25:53,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1906 conditions, 509 events. 283/509 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2059 event pairs, 38 based on Foata normal form. 18/527 useless extension candidates. Maximal degree in co-relation 1255. Up to 181 conditions per place. [2022-11-25 17:25:53,936 INFO L137 encePairwiseOnDemand]: 148/154 looper letters, 75 selfloop transitions, 20 changer transitions 4/99 dead transitions. [2022-11-25 17:25:53,936 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 99 transitions, 700 flow [2022-11-25 17:25:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:25:53,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:25:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 838 transitions. [2022-11-25 17:25:53,941 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45346320346320346 [2022-11-25 17:25:53,941 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 838 transitions. [2022-11-25 17:25:53,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 838 transitions. [2022-11-25 17:25:53,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:53,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 838 transitions. [2022-11-25 17:25:53,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 69.83333333333333) internal successors, (838), 12 states have internal predecessors, (838), 0 states have call successors, (0), 0 states 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 17:25:53,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states 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 17:25:53,952 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 154.0) internal successors, (2002), 13 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states 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 17:25:53,953 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 183 flow. Second operand 12 states and 838 transitions. [2022-11-25 17:25:53,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 99 transitions, 700 flow [2022-11-25 17:25:53,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 690 flow, removed 5 selfloop flow, removed 0 redundant places. [2022-11-25 17:25:53,962 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 374 flow [2022-11-25 17:25:53,962 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=374, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2022-11-25 17:25:53,965 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2022-11-25 17:25:53,966 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 374 flow [2022-11-25 17:25:53,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 65.14285714285714) internal successors, (912), 14 states have internal predecessors, (912), 0 states have call successors, (0), 0 states 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 17:25:53,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:53,967 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:53,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:54,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:25:54,175 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 17:25:54,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:54,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1179578402, now seen corresponding path program 4 times [2022-11-25 17:25:54,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:54,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110526887] [2022-11-25 17:25:54,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:54,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:54,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:54,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110526887] [2022-11-25 17:25:54,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110526887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:54,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006702394] [2022-11-25 17:25:54,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:25:54,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:54,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:54,442 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:54,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:25:54,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:25:54,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:54,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:25:54,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:54,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:54,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006702394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:54,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:54,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-11-25 17:25:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805562060] [2022-11-25 17:25:54,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:54,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:25:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:54,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:25:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:25:55,169 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-11-25 17:25:55,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 374 flow. Second operand has 16 states, 16 states have (on average 65.125) internal successors, (1042), 16 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states 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 17:25:55,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:55,171 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-11-25 17:25:55,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:56,422 INFO L130 PetriNetUnfolder]: 364/656 cut-off events. [2022-11-25 17:25:56,422 INFO L131 PetriNetUnfolder]: For 3266/3266 co-relation queries the response was YES. [2022-11-25 17:25:56,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3041 conditions, 656 events. 364/656 cut-off events. For 3266/3266 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2903 event pairs, 42 based on Foata normal form. 38/694 useless extension candidates. Maximal degree in co-relation 2244. Up to 243 conditions per place. [2022-11-25 17:25:56,430 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 99 selfloop transitions, 43 changer transitions 7/149 dead transitions. [2022-11-25 17:25:56,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 149 transitions, 1233 flow [2022-11-25 17:25:56,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:25:56,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:25:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1321 transitions. [2022-11-25 17:25:56,437 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4514695830485304 [2022-11-25 17:25:56,437 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1321 transitions. [2022-11-25 17:25:56,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1321 transitions. [2022-11-25 17:25:56,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:56,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1321 transitions. [2022-11-25 17:25:56,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 69.52631578947368) internal successors, (1321), 19 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states 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 17:25:56,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 154.0) internal successors, (3080), 20 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states 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 17:25:56,452 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 154.0) internal successors, (3080), 20 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states 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 17:25:56,453 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 374 flow. Second operand 19 states and 1321 transitions. [2022-11-25 17:25:56,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 149 transitions, 1233 flow [2022-11-25 17:25:56,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 149 transitions, 1130 flow, removed 46 selfloop flow, removed 4 redundant places. [2022-11-25 17:25:56,474 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 736 flow [2022-11-25 17:25:56,474 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=736, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2022-11-25 17:25:56,476 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2022-11-25 17:25:56,476 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 736 flow [2022-11-25 17:25:56,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.125) internal successors, (1042), 16 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states 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 17:25:56,477 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:56,478 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:56,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:56,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:25:56,685 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 17:25:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:56,686 INFO L85 PathProgramCache]: Analyzing trace with hash -962687294, now seen corresponding path program 5 times [2022-11-25 17:25:56,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:56,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051400718] [2022-11-25 17:25:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:56,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:56,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051400718] [2022-11-25 17:25:56,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051400718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:56,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839532851] [2022-11-25 17:25:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:25:56,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:56,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:56,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:25:57,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:25:57,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:25:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:57,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:57,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839532851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:57,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:57,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-25 17:25:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771904294] [2022-11-25 17:25:57,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:57,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:25:57,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:25:57,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:25:57,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 154 [2022-11-25 17:25:57,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 736 flow. Second operand has 13 states, 13 states have (on average 66.92307692307692) internal successors, (870), 13 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 17:25:57,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:57,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 154 [2022-11-25 17:25:57,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:25:58,591 INFO L130 PetriNetUnfolder]: 508/927 cut-off events. [2022-11-25 17:25:58,591 INFO L131 PetriNetUnfolder]: For 10528/10528 co-relation queries the response was YES. [2022-11-25 17:25:58,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5516 conditions, 927 events. 508/927 cut-off events. For 10528/10528 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4565 event pairs, 38 based on Foata normal form. 18/945 useless extension candidates. Maximal degree in co-relation 5328. Up to 319 conditions per place. [2022-11-25 17:25:58,604 INFO L137 encePairwiseOnDemand]: 148/154 looper letters, 98 selfloop transitions, 77 changer transitions 11/186 dead transitions. [2022-11-25 17:25:58,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 186 transitions, 2207 flow [2022-11-25 17:25:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:25:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-25 17:25:58,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1057 transitions. [2022-11-25 17:25:58,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4575757575757576 [2022-11-25 17:25:58,609 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1057 transitions. [2022-11-25 17:25:58,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1057 transitions. [2022-11-25 17:25:58,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:25:58,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1057 transitions. [2022-11-25 17:25:58,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.46666666666667) internal successors, (1057), 15 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states 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 17:25:58,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 154.0) internal successors, (2464), 16 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states 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 17:25:58,620 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 154.0) internal successors, (2464), 16 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states 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 17:25:58,620 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 736 flow. Second operand 15 states and 1057 transitions. [2022-11-25 17:25:58,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 186 transitions, 2207 flow [2022-11-25 17:25:58,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 186 transitions, 1923 flow, removed 121 selfloop flow, removed 6 redundant places. [2022-11-25 17:25:58,661 INFO L231 Difference]: Finished difference. Result has 87 places, 120 transitions, 1358 flow [2022-11-25 17:25:58,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1358, PETRI_PLACES=87, PETRI_TRANSITIONS=120} [2022-11-25 17:25:58,663 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 67 predicate places. [2022-11-25 17:25:58,663 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 120 transitions, 1358 flow [2022-11-25 17:25:58,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.92307692307692) internal successors, (870), 13 states have internal predecessors, (870), 0 states have call successors, (0), 0 states 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 17:25:58,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:25:58,664 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:25:58,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:25:58,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:58,871 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 17:25:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:25:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1123800122, now seen corresponding path program 6 times [2022-11-25 17:25:58,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:25:58,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330473429] [2022-11-25 17:25:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:25:58,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:25:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:25:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:59,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:25:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330473429] [2022-11-25 17:25:59,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330473429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:25:59,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588404347] [2022-11-25 17:25:59,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:25:59,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:25:59,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:25:59,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:25:59,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:25:59,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:25:59,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:25:59,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:25:59,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:25:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:59,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:25:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:25:59,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588404347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:25:59,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:25:59,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-11-25 17:25:59,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669286542] [2022-11-25 17:25:59,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:25:59,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:25:59,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:25:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:25:59,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:25:59,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 154 [2022-11-25 17:25:59,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 120 transitions, 1358 flow. Second operand has 14 states, 14 states have (on average 67.21428571428571) internal successors, (941), 14 states have internal predecessors, (941), 0 states have call successors, (0), 0 states 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 17:25:59,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:25:59,757 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 154 [2022-11-25 17:25:59,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:01,169 INFO L130 PetriNetUnfolder]: 541/1047 cut-off events. [2022-11-25 17:26:01,169 INFO L131 PetriNetUnfolder]: For 15093/15093 co-relation queries the response was YES. [2022-11-25 17:26:01,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6748 conditions, 1047 events. 541/1047 cut-off events. For 15093/15093 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5668 event pairs, 15 based on Foata normal form. 30/1077 useless extension candidates. Maximal degree in co-relation 6331. Up to 313 conditions per place. [2022-11-25 17:26:01,182 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 97 selfloop transitions, 106 changer transitions 33/236 dead transitions. [2022-11-25 17:26:01,182 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 236 transitions, 2758 flow [2022-11-25 17:26:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 17:26:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 17:26:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1639 transitions. [2022-11-25 17:26:01,188 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46273291925465837 [2022-11-25 17:26:01,188 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1639 transitions. [2022-11-25 17:26:01,188 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1639 transitions. [2022-11-25 17:26:01,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:01,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1639 transitions. [2022-11-25 17:26:01,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 71.26086956521739) internal successors, (1639), 23 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states 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 17:26:01,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 154.0) internal successors, (3696), 24 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states 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 17:26:01,202 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 154.0) internal successors, (3696), 24 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states 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 17:26:01,202 INFO L175 Difference]: Start difference. First operand has 87 places, 120 transitions, 1358 flow. Second operand 23 states and 1639 transitions. [2022-11-25 17:26:01,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 236 transitions, 2758 flow [2022-11-25 17:26:01,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 236 transitions, 2369 flow, removed 192 selfloop flow, removed 2 redundant places. [2022-11-25 17:26:01,274 INFO L231 Difference]: Finished difference. Result has 113 places, 144 transitions, 1727 flow [2022-11-25 17:26:01,274 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1110, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1727, PETRI_PLACES=113, PETRI_TRANSITIONS=144} [2022-11-25 17:26:01,275 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 93 predicate places. [2022-11-25 17:26:01,275 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 144 transitions, 1727 flow [2022-11-25 17:26:01,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 67.21428571428571) internal successors, (941), 14 states have internal predecessors, (941), 0 states have call successors, (0), 0 states 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 17:26:01,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:01,276 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:01,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:01,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:01,483 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 17:26:01,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:01,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1158523886, now seen corresponding path program 7 times [2022-11-25 17:26:01,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:01,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582997371] [2022-11-25 17:26:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:01,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:01,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:01,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582997371] [2022-11-25 17:26:01,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582997371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:01,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760084221] [2022-11-25 17:26:01,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:26:01,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:01,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:01,740 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:01,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:26:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:01,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:26:01,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:01,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:02,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760084221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:02,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:02,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2022-11-25 17:26:02,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137189584] [2022-11-25 17:26:02,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:02,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:26:02,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:02,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:26:02,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:26:02,302 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-11-25 17:26:02,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 144 transitions, 1727 flow. Second operand has 16 states, 16 states have (on average 65.0625) internal successors, (1041), 16 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states 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 17:26:02,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:02,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-11-25 17:26:02,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:03,976 INFO L130 PetriNetUnfolder]: 739/1405 cut-off events. [2022-11-25 17:26:03,976 INFO L131 PetriNetUnfolder]: For 14949/14949 co-relation queries the response was YES. [2022-11-25 17:26:03,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9201 conditions, 1405 events. 739/1405 cut-off events. For 14949/14949 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 8096 event pairs, 62 based on Foata normal form. 51/1456 useless extension candidates. Maximal degree in co-relation 9122. Up to 776 conditions per place. [2022-11-25 17:26:03,993 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 201 selfloop transitions, 129 changer transitions 13/343 dead transitions. [2022-11-25 17:26:03,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 343 transitions, 4450 flow [2022-11-25 17:26:03,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 17:26:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-11-25 17:26:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1876 transitions. [2022-11-25 17:26:03,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4511784511784512 [2022-11-25 17:26:03,999 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1876 transitions. [2022-11-25 17:26:04,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1876 transitions. [2022-11-25 17:26:04,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:04,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1876 transitions. [2022-11-25 17:26:04,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 69.48148148148148) internal successors, (1876), 27 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states 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 17:26:04,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 154.0) internal successors, (4312), 28 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states 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 17:26:04,021 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 154.0) internal successors, (4312), 28 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states 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 17:26:04,022 INFO L175 Difference]: Start difference. First operand has 113 places, 144 transitions, 1727 flow. Second operand 27 states and 1876 transitions. [2022-11-25 17:26:04,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 343 transitions, 4450 flow [2022-11-25 17:26:04,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 343 transitions, 3896 flow, removed 219 selfloop flow, removed 13 redundant places. [2022-11-25 17:26:04,124 INFO L231 Difference]: Finished difference. Result has 137 places, 219 transitions, 2969 flow [2022-11-25 17:26:04,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2969, PETRI_PLACES=137, PETRI_TRANSITIONS=219} [2022-11-25 17:26:04,125 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2022-11-25 17:26:04,126 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 219 transitions, 2969 flow [2022-11-25 17:26:04,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.0625) internal successors, (1041), 16 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states 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 17:26:04,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:04,127 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:04,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-25 17:26:04,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:04,333 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 17:26:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:04,334 INFO L85 PathProgramCache]: Analyzing trace with hash 189171366, now seen corresponding path program 8 times [2022-11-25 17:26:04,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:04,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011921530] [2022-11-25 17:26:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:04,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:04,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:04,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011921530] [2022-11-25 17:26:04,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011921530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:04,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922416278] [2022-11-25 17:26:04,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:26:04,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:04,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:04,584 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:04,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:26:04,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:26:04,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:26:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:04,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:05,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922416278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:05,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:05,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-11-25 17:26:05,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580641501] [2022-11-25 17:26:05,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:05,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:26:05,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:05,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:26:05,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:26:05,274 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 154 [2022-11-25 17:26:05,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 219 transitions, 2969 flow. Second operand has 14 states, 14 states have (on average 66.85714285714286) internal successors, (936), 14 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 17:26:05,276 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:05,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 154 [2022-11-25 17:26:05,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:06,776 INFO L130 PetriNetUnfolder]: 1025/2012 cut-off events. [2022-11-25 17:26:06,776 INFO L131 PetriNetUnfolder]: For 34367/34367 co-relation queries the response was YES. [2022-11-25 17:26:06,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14249 conditions, 2012 events. 1025/2012 cut-off events. For 34367/34367 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 12958 event pairs, 187 based on Foata normal form. 20/2032 useless extension candidates. Maximal degree in co-relation 13251. Up to 572 conditions per place. [2022-11-25 17:26:06,806 INFO L137 encePairwiseOnDemand]: 148/154 looper letters, 197 selfloop transitions, 155 changer transitions 9/361 dead transitions. [2022-11-25 17:26:06,806 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 361 transitions, 5649 flow [2022-11-25 17:26:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 17:26:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 17:26:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1478 transitions. [2022-11-25 17:26:06,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45701917130488556 [2022-11-25 17:26:06,811 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1478 transitions. [2022-11-25 17:26:06,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1478 transitions. [2022-11-25 17:26:06,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:06,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1478 transitions. [2022-11-25 17:26:06,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 70.38095238095238) internal successors, (1478), 21 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states 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 17:26:06,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states 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 17:26:06,828 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 154.0) internal successors, (3388), 22 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states 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 17:26:06,828 INFO L175 Difference]: Start difference. First operand has 137 places, 219 transitions, 2969 flow. Second operand 21 states and 1478 transitions. [2022-11-25 17:26:06,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 361 transitions, 5649 flow [2022-11-25 17:26:07,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 361 transitions, 4968 flow, removed 326 selfloop flow, removed 5 redundant places. [2022-11-25 17:26:07,128 INFO L231 Difference]: Finished difference. Result has 164 places, 273 transitions, 4023 flow [2022-11-25 17:26:07,129 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4023, PETRI_PLACES=164, PETRI_TRANSITIONS=273} [2022-11-25 17:26:07,129 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2022-11-25 17:26:07,129 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 273 transitions, 4023 flow [2022-11-25 17:26:07,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 66.85714285714286) internal successors, (936), 14 states have internal predecessors, (936), 0 states have call successors, (0), 0 states 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 17:26:07,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:07,132 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:07,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:07,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:07,338 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 17:26:07,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:07,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1046856604, now seen corresponding path program 9 times [2022-11-25 17:26:07,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:07,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863056915] [2022-11-25 17:26:07,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:07,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:07,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:07,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863056915] [2022-11-25 17:26:07,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863056915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:07,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393307250] [2022-11-25 17:26:07,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:26:07,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:07,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:07,658 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:07,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:26:07,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:26:07,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:07,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:26:07,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:07,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:08,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393307250] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:08,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:08,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-25 17:26:08,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317076996] [2022-11-25 17:26:08,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:08,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:26:08,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:08,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:26:08,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:26:08,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 154 [2022-11-25 17:26:08,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 273 transitions, 4023 flow. Second operand has 15 states, 15 states have (on average 66.73333333333333) internal successors, (1001), 15 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 17:26:08,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:08,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 154 [2022-11-25 17:26:08,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:11,224 INFO L130 PetriNetUnfolder]: 1079/2154 cut-off events. [2022-11-25 17:26:11,224 INFO L131 PetriNetUnfolder]: For 38588/38588 co-relation queries the response was YES. [2022-11-25 17:26:11,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15489 conditions, 2154 events. 1079/2154 cut-off events. For 38588/38588 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14372 event pairs, 179 based on Foata normal form. 24/2178 useless extension candidates. Maximal degree in co-relation 14847. Up to 1119 conditions per place. [2022-11-25 17:26:11,256 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 206 selfloop transitions, 187 changer transitions 2/395 dead transitions. [2022-11-25 17:26:11,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 395 transitions, 6000 flow [2022-11-25 17:26:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:26:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 17:26:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1565 transitions. [2022-11-25 17:26:11,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46192443919716647 [2022-11-25 17:26:11,263 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1565 transitions. [2022-11-25 17:26:11,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1565 transitions. [2022-11-25 17:26:11,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:11,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1565 transitions. [2022-11-25 17:26:11,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 71.13636363636364) internal successors, (1565), 22 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:26:11,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states 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 17:26:11,274 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 154.0) internal successors, (3542), 23 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states 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 17:26:11,274 INFO L175 Difference]: Start difference. First operand has 164 places, 273 transitions, 4023 flow. Second operand 22 states and 1565 transitions. [2022-11-25 17:26:11,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 395 transitions, 6000 flow [2022-11-25 17:26:11,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 395 transitions, 5615 flow, removed 160 selfloop flow, removed 8 redundant places. [2022-11-25 17:26:11,597 INFO L231 Difference]: Finished difference. Result has 181 places, 309 transitions, 4733 flow [2022-11-25 17:26:11,597 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=3667, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4733, PETRI_PLACES=181, PETRI_TRANSITIONS=309} [2022-11-25 17:26:11,598 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 161 predicate places. [2022-11-25 17:26:11,598 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 309 transitions, 4733 flow [2022-11-25 17:26:11,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 66.73333333333333) internal successors, (1001), 15 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states 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 17:26:11,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:11,599 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:11,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:11,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:26:11,805 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 17:26:11,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:11,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1016922136, now seen corresponding path program 10 times [2022-11-25 17:26:11,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:11,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922128296] [2022-11-25 17:26:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:12,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:12,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922128296] [2022-11-25 17:26:12,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922128296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:12,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597149953] [2022-11-25 17:26:12,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:26:12,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:12,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:12,191 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:12,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:26:12,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:26:12,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:12,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:26:12,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:12,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:13,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597149953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:13,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:13,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-25 17:26:13,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669588851] [2022-11-25 17:26:13,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:13,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:26:13,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:13,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:26:13,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:26:13,834 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 154 [2022-11-25 17:26:13,836 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 309 transitions, 4733 flow. Second operand has 19 states, 19 states have (on average 64.52631578947368) internal successors, (1226), 19 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states 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 17:26:13,836 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:13,836 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 154 [2022-11-25 17:26:13,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:16,466 INFO L130 PetriNetUnfolder]: 1480/2995 cut-off events. [2022-11-25 17:26:16,467 INFO L131 PetriNetUnfolder]: For 61778/61778 co-relation queries the response was YES. [2022-11-25 17:26:16,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22951 conditions, 2995 events. 1480/2995 cut-off events. For 61778/61778 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21815 event pairs, 85 based on Foata normal form. 29/3024 useless extension candidates. Maximal degree in co-relation 21387. Up to 977 conditions per place. [2022-11-25 17:26:16,517 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 280 selfloop transitions, 163 changer transitions 94/537 dead transitions. [2022-11-25 17:26:16,517 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 537 transitions, 9049 flow [2022-11-25 17:26:16,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 17:26:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-11-25 17:26:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1316 transitions. [2022-11-25 17:26:16,522 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44976076555023925 [2022-11-25 17:26:16,523 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1316 transitions. [2022-11-25 17:26:16,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1316 transitions. [2022-11-25 17:26:16,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:16,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1316 transitions. [2022-11-25 17:26:16,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 69.26315789473684) internal successors, (1316), 19 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states 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 17:26:16,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 154.0) internal successors, (3080), 20 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states 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 17:26:16,544 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 154.0) internal successors, (3080), 20 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states 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 17:26:16,552 INFO L175 Difference]: Start difference. First operand has 181 places, 309 transitions, 4733 flow. Second operand 19 states and 1316 transitions. [2022-11-25 17:26:16,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 537 transitions, 9049 flow [2022-11-25 17:26:16,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 537 transitions, 8790 flow, removed 92 selfloop flow, removed 7 redundant places. [2022-11-25 17:26:16,892 INFO L231 Difference]: Finished difference. Result has 198 places, 366 transitions, 6511 flow [2022-11-25 17:26:16,893 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6511, PETRI_PLACES=198, PETRI_TRANSITIONS=366} [2022-11-25 17:26:16,893 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 178 predicate places. [2022-11-25 17:26:16,894 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 366 transitions, 6511 flow [2022-11-25 17:26:16,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.52631578947368) internal successors, (1226), 19 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states 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 17:26:16,895 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:16,895 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:16,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:17,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:17,096 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 17:26:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:17,096 INFO L85 PathProgramCache]: Analyzing trace with hash -374127902, now seen corresponding path program 11 times [2022-11-25 17:26:17,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:17,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69154054] [2022-11-25 17:26:17,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:17,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:26:17,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:17,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69154054] [2022-11-25 17:26:17,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69154054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059565532] [2022-11-25 17:26:17,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:26:17,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:17,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:17,571 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:17,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:26:17,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:26:17,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:17,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:26:17,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:26:17,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:26:18,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059565532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:18,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:18,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2022-11-25 17:26:18,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215191560] [2022-11-25 17:26:18,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:18,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:26:18,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:18,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:26:18,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:26:18,691 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 154 [2022-11-25 17:26:18,692 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 366 transitions, 6511 flow. Second operand has 16 states, 16 states have (on average 64.0625) internal successors, (1025), 16 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 17:26:18,692 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:18,692 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 154 [2022-11-25 17:26:18,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:20,105 INFO L130 PetriNetUnfolder]: 1081/2259 cut-off events. [2022-11-25 17:26:20,106 INFO L131 PetriNetUnfolder]: For 48034/48034 co-relation queries the response was YES. [2022-11-25 17:26:20,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18149 conditions, 2259 events. 1081/2259 cut-off events. For 48034/48034 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15894 event pairs, 67 based on Foata normal form. 32/2291 useless extension candidates. Maximal degree in co-relation 17223. Up to 1449 conditions per place. [2022-11-25 17:26:20,136 INFO L137 encePairwiseOnDemand]: 148/154 looper letters, 311 selfloop transitions, 117 changer transitions 31/459 dead transitions. [2022-11-25 17:26:20,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 459 transitions, 8658 flow [2022-11-25 17:26:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:26:20,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-25 17:26:20,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1225 transitions. [2022-11-25 17:26:20,141 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2022-11-25 17:26:20,142 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1225 transitions. [2022-11-25 17:26:20,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1225 transitions. [2022-11-25 17:26:20,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:20,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1225 transitions. [2022-11-25 17:26:20,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 68.05555555555556) internal successors, (1225), 18 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states 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 17:26:20,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 154.0) internal successors, (2926), 19 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 17:26:20,151 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 154.0) internal successors, (2926), 19 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states 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 17:26:20,151 INFO L175 Difference]: Start difference. First operand has 198 places, 366 transitions, 6511 flow. Second operand 18 states and 1225 transitions. [2022-11-25 17:26:20,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 459 transitions, 8658 flow [2022-11-25 17:26:20,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 459 transitions, 8089 flow, removed 261 selfloop flow, removed 10 redundant places. [2022-11-25 17:26:20,684 INFO L231 Difference]: Finished difference. Result has 207 places, 378 transitions, 6766 flow [2022-11-25 17:26:20,684 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=5992, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6766, PETRI_PLACES=207, PETRI_TRANSITIONS=378} [2022-11-25 17:26:20,685 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 187 predicate places. [2022-11-25 17:26:20,685 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 378 transitions, 6766 flow [2022-11-25 17:26:20,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.0625) internal successors, (1025), 16 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states 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 17:26:20,686 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:20,686 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:20,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-25 17:26:20,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:26:20,886 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 17:26:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:20,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2102033630, now seen corresponding path program 12 times [2022-11-25 17:26:20,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:20,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17273306] [2022-11-25 17:26:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:20,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:21,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:21,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17273306] [2022-11-25 17:26:21,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17273306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:21,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025091300] [2022-11-25 17:26:21,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:26:21,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:21,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:21,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:21,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:26:21,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 17:26:21,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:26:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:26:21,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:21,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:26:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:27,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025091300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:26:27,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:26:27,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-25 17:26:27,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526320029] [2022-11-25 17:26:27,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:26:27,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:26:27,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:26:27,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:26:27,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:26:28,945 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-11-25 17:26:28,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 378 transitions, 6766 flow. Second operand has 18 states, 18 states have (on average 64.77777777777777) internal successors, (1166), 18 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states 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 17:26:28,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:26:28,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-11-25 17:26:28,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:26:47,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:26:57,971 INFO L130 PetriNetUnfolder]: 1411/2822 cut-off events. [2022-11-25 17:26:57,971 INFO L131 PetriNetUnfolder]: For 51725/51725 co-relation queries the response was YES. [2022-11-25 17:26:57,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22907 conditions, 2822 events. 1411/2822 cut-off events. For 51725/51725 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19952 event pairs, 12 based on Foata normal form. 24/2846 useless extension candidates. Maximal degree in co-relation 22247. Up to 677 conditions per place. [2022-11-25 17:26:58,007 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 269 selfloop transitions, 314 changer transitions 28/611 dead transitions. [2022-11-25 17:26:58,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 611 transitions, 11690 flow [2022-11-25 17:26:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:26:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-25 17:26:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2570 transitions. [2022-11-25 17:26:58,017 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4391660970608339 [2022-11-25 17:26:58,018 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2570 transitions. [2022-11-25 17:26:58,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2570 transitions. [2022-11-25 17:26:58,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:26:58,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2570 transitions. [2022-11-25 17:26:58,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 67.63157894736842) internal successors, (2570), 38 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states 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 17:26:58,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 154.0) internal successors, (6006), 39 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states 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 17:26:58,034 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 154.0) internal successors, (6006), 39 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states 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 17:26:58,035 INFO L175 Difference]: Start difference. First operand has 207 places, 378 transitions, 6766 flow. Second operand 38 states and 2570 transitions. [2022-11-25 17:26:58,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 611 transitions, 11690 flow [2022-11-25 17:26:58,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 611 transitions, 11352 flow, removed 82 selfloop flow, removed 11 redundant places. [2022-11-25 17:26:58,654 INFO L231 Difference]: Finished difference. Result has 253 places, 500 transitions, 10145 flow [2022-11-25 17:26:58,655 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=6520, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=10145, PETRI_PLACES=253, PETRI_TRANSITIONS=500} [2022-11-25 17:26:58,655 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 233 predicate places. [2022-11-25 17:26:58,655 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 500 transitions, 10145 flow [2022-11-25 17:26:58,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 64.77777777777777) internal successors, (1166), 18 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states 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 17:26:58,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:26:58,656 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:26:58,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 17:26:58,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-25 17:26:58,857 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 17:26:58,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:26:58,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1335248428, now seen corresponding path program 13 times [2022-11-25 17:26:58,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:26:58,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416630963] [2022-11-25 17:26:58,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:26:58,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:26:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:59,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:26:59,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416630963] [2022-11-25 17:26:59,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416630963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:26:59,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938279775] [2022-11-25 17:26:59,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:26:59,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:26:59,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:26:59,188 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:26:59,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 17:26:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:26:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:26:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:26:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:26:59,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:00,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938279775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:00,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:00,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-11-25 17:27:00,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010564023] [2022-11-25 17:27:00,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:00,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:27:00,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:00,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:27:00,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:27:00,322 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-11-25 17:27:00,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 500 transitions, 10145 flow. Second operand has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states 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 17:27:00,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:00,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-11-25 17:27:00,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:27:03,889 INFO L130 PetriNetUnfolder]: 1528/3127 cut-off events. [2022-11-25 17:27:03,890 INFO L131 PetriNetUnfolder]: For 76062/76062 co-relation queries the response was YES. [2022-11-25 17:27:03,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27221 conditions, 3127 events. 1528/3127 cut-off events. For 76062/76062 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 22874 event pairs, 40 based on Foata normal form. 112/3239 useless extension candidates. Maximal degree in co-relation 26932. Up to 742 conditions per place. [2022-11-25 17:27:03,942 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 287 selfloop transitions, 363 changer transitions 3/653 dead transitions. [2022-11-25 17:27:03,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 653 transitions, 13481 flow [2022-11-25 17:27:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:27:03,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 17:27:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2053 transitions. [2022-11-25 17:27:03,948 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44437229437229436 [2022-11-25 17:27:03,949 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2053 transitions. [2022-11-25 17:27:03,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2053 transitions. [2022-11-25 17:27:03,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:03,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2053 transitions. [2022-11-25 17:27:03,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 68.43333333333334) internal successors, (2053), 30 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states 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 17:27:03,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 154.0) internal successors, (4774), 31 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states 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 17:27:03,963 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 154.0) internal successors, (4774), 31 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states 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 17:27:03,963 INFO L175 Difference]: Start difference. First operand has 253 places, 500 transitions, 10145 flow. Second operand 30 states and 2053 transitions. [2022-11-25 17:27:03,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 653 transitions, 13481 flow [2022-11-25 17:27:04,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 653 transitions, 12874 flow, removed 291 selfloop flow, removed 9 redundant places. [2022-11-25 17:27:04,838 INFO L231 Difference]: Finished difference. Result has 275 places, 554 transitions, 11981 flow [2022-11-25 17:27:04,839 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=8958, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=11981, PETRI_PLACES=275, PETRI_TRANSITIONS=554} [2022-11-25 17:27:04,839 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 255 predicate places. [2022-11-25 17:27:04,839 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 554 transitions, 11981 flow [2022-11-25 17:27:04,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 64.7) internal successors, (1294), 20 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states 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 17:27:04,840 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:27:04,840 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:04,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:05,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:27:05,046 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 17:27:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash 671937308, now seen corresponding path program 14 times [2022-11-25 17:27:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:05,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073834909] [2022-11-25 17:27:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:05,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:05,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073834909] [2022-11-25 17:27:05,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073834909] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:05,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055665669] [2022-11-25 17:27:05,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:27:05,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:05,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:05,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:05,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 17:27:05,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:27:05,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:05,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:27:05,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:05,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:06,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055665669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:06,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:06,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-25 17:27:06,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285702111] [2022-11-25 17:27:06,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:06,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:27:06,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:27:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:27:06,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-11-25 17:27:06,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 554 transitions, 11981 flow. Second operand has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 17:27:06,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:06,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-11-25 17:27:06,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:27:12,426 INFO L130 PetriNetUnfolder]: 1796/3634 cut-off events. [2022-11-25 17:27:12,426 INFO L131 PetriNetUnfolder]: For 96496/96496 co-relation queries the response was YES. [2022-11-25 17:27:12,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34028 conditions, 3634 events. 1796/3634 cut-off events. For 96496/96496 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 27006 event pairs, 62 based on Foata normal form. 54/3688 useless extension candidates. Maximal degree in co-relation 33541. Up to 997 conditions per place. [2022-11-25 17:27:12,474 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 308 selfloop transitions, 433 changer transitions 0/741 dead transitions. [2022-11-25 17:27:12,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 741 transitions, 16819 flow [2022-11-25 17:27:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:27:12,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-25 17:27:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1720 transitions. [2022-11-25 17:27:12,479 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44675324675324674 [2022-11-25 17:27:12,480 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1720 transitions. [2022-11-25 17:27:12,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1720 transitions. [2022-11-25 17:27:12,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:12,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1720 transitions. [2022-11-25 17:27:12,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 68.8) internal successors, (1720), 25 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states 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 17:27:12,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 154.0) internal successors, (4004), 26 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states 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 17:27:12,491 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 154.0) internal successors, (4004), 26 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states 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 17:27:12,491 INFO L175 Difference]: Start difference. First operand has 275 places, 554 transitions, 11981 flow. Second operand 25 states and 1720 transitions. [2022-11-25 17:27:12,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 741 transitions, 16819 flow [2022-11-25 17:27:13,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 741 transitions, 16036 flow, removed 259 selfloop flow, removed 15 redundant places. [2022-11-25 17:27:13,793 INFO L231 Difference]: Finished difference. Result has 290 places, 654 transitions, 15394 flow [2022-11-25 17:27:13,794 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=11134, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15394, PETRI_PLACES=290, PETRI_TRANSITIONS=654} [2022-11-25 17:27:13,795 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 270 predicate places. [2022-11-25 17:27:13,795 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 654 transitions, 15394 flow [2022-11-25 17:27:13,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 65.04347826086956) internal successors, (1496), 23 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states 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 17:27:13,796 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:27:13,796 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:13,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:14,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:14,003 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 17:27:14,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash -112462070, now seen corresponding path program 15 times [2022-11-25 17:27:14,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:14,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604369874] [2022-11-25 17:27:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:14,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:14,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604369874] [2022-11-25 17:27:14,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604369874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609215648] [2022-11-25 17:27:14,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:27:14,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:14,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:14,291 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:14,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 17:27:14,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 17:27:14,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:14,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:27:14,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:14,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:15,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609215648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:15,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:15,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2022-11-25 17:27:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683431758] [2022-11-25 17:27:15,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:15,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:27:15,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:27:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:27:16,145 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:27:16,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 654 transitions, 15394 flow. Second operand has 20 states, 20 states have (on average 62.95) internal successors, (1259), 20 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states 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 17:27:16,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:16,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:27:16,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:27:21,261 INFO L130 PetriNetUnfolder]: 1992/4037 cut-off events. [2022-11-25 17:27:21,261 INFO L131 PetriNetUnfolder]: For 117374/117374 co-relation queries the response was YES. [2022-11-25 17:27:21,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40536 conditions, 4037 events. 1992/4037 cut-off events. For 117374/117374 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 30586 event pairs, 113 based on Foata normal form. 18/4055 useless extension candidates. Maximal degree in co-relation 40274. Up to 1468 conditions per place. [2022-11-25 17:27:21,425 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 423 selfloop transitions, 354 changer transitions 26/803 dead transitions. [2022-11-25 17:27:21,425 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 803 transitions, 20036 flow [2022-11-25 17:27:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 17:27:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 17:27:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1893 transitions. [2022-11-25 17:27:21,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4238692342140618 [2022-11-25 17:27:21,432 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1893 transitions. [2022-11-25 17:27:21,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1893 transitions. [2022-11-25 17:27:21,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:21,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1893 transitions. [2022-11-25 17:27:21,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.27586206896552) internal successors, (1893), 29 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states 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 17:27:21,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 154.0) internal successors, (4620), 30 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states 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 17:27:21,446 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 154.0) internal successors, (4620), 30 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states 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 17:27:21,446 INFO L175 Difference]: Start difference. First operand has 290 places, 654 transitions, 15394 flow. Second operand 29 states and 1893 transitions. [2022-11-25 17:27:21,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 803 transitions, 20036 flow [2022-11-25 17:27:23,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 803 transitions, 19173 flow, removed 345 selfloop flow, removed 15 redundant places. [2022-11-25 17:27:23,156 INFO L231 Difference]: Finished difference. Result has 311 places, 723 transitions, 17608 flow [2022-11-25 17:27:23,157 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=14571, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=17608, PETRI_PLACES=311, PETRI_TRANSITIONS=723} [2022-11-25 17:27:23,158 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 291 predicate places. [2022-11-25 17:27:23,158 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 723 transitions, 17608 flow [2022-11-25 17:27:23,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.95) internal successors, (1259), 20 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states 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 17:27:23,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:27:23,158 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:23,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:23,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 17:27:23,359 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 17:27:23,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:23,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1201348052, now seen corresponding path program 16 times [2022-11-25 17:27:23,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:23,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116748604] [2022-11-25 17:27:23,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:23,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:23,700 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 17:27:23,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:23,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116748604] [2022-11-25 17:27:23,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116748604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:23,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192594123] [2022-11-25 17:27:23,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:27:23,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:23,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:23,702 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:23,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 17:27:23,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:27:23,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:23,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:27:23,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:24,236 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 17:27:24,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:24,571 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 17:27:24,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192594123] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:24,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:24,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-25 17:27:24,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036233119] [2022-11-25 17:27:24,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:24,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:27:24,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:24,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:27:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:27:24,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:27:24,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 723 transitions, 17608 flow. Second operand has 18 states, 18 states have (on average 62.94444444444444) internal successors, (1133), 18 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states 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 17:27:24,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:24,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:27:24,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:27:30,665 INFO L130 PetriNetUnfolder]: 3399/7010 cut-off events. [2022-11-25 17:27:30,665 INFO L131 PetriNetUnfolder]: For 211128/211128 co-relation queries the response was YES. [2022-11-25 17:27:30,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70888 conditions, 7010 events. 3399/7010 cut-off events. For 211128/211128 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 59509 event pairs, 233 based on Foata normal form. 84/7094 useless extension candidates. Maximal degree in co-relation 70591. Up to 2102 conditions per place. [2022-11-25 17:27:30,766 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 952 selfloop transitions, 444 changer transitions 25/1421 dead transitions. [2022-11-25 17:27:30,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1421 transitions, 35851 flow [2022-11-25 17:27:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 17:27:30,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-11-25 17:27:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1961 transitions. [2022-11-25 17:27:30,773 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4390953873712494 [2022-11-25 17:27:30,773 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1961 transitions. [2022-11-25 17:27:30,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1961 transitions. [2022-11-25 17:27:30,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:30,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1961 transitions. [2022-11-25 17:27:30,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 67.62068965517241) internal successors, (1961), 29 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states 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 17:27:30,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 154.0) internal successors, (4620), 30 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states 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 17:27:30,789 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 154.0) internal successors, (4620), 30 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states 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 17:27:30,789 INFO L175 Difference]: Start difference. First operand has 311 places, 723 transitions, 17608 flow. Second operand 29 states and 1961 transitions. [2022-11-25 17:27:30,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1421 transitions, 35851 flow [2022-11-25 17:27:33,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 1421 transitions, 34049 flow, removed 848 selfloop flow, removed 12 redundant places. [2022-11-25 17:27:33,793 INFO L231 Difference]: Finished difference. Result has 337 places, 965 transitions, 23840 flow [2022-11-25 17:27:33,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=16493, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=23840, PETRI_PLACES=337, PETRI_TRANSITIONS=965} [2022-11-25 17:27:33,794 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 317 predicate places. [2022-11-25 17:27:33,794 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 965 transitions, 23840 flow [2022-11-25 17:27:33,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 62.94444444444444) internal successors, (1133), 18 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states 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 17:27:33,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:27:33,794 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:33,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:33,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:33,995 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 17:27:33,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:33,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1908210370, now seen corresponding path program 17 times [2022-11-25 17:27:33,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:33,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36055145] [2022-11-25 17:27:33,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:33,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:34,600 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 17:27:34,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:34,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36055145] [2022-11-25 17:27:34,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36055145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:34,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614365453] [2022-11-25 17:27:34,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:27:34,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:34,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:34,611 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:34,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 17:27:34,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:27:34,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:34,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:27:34,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:35,088 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 17:27:35,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:35,491 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 17:27:35,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614365453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:35,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:35,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-11-25 17:27:35,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978192451] [2022-11-25 17:27:35,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:35,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:27:35,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:27:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:27:35,913 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:27:35,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 965 transitions, 23840 flow. Second operand has 21 states, 21 states have (on average 62.904761904761905) internal successors, (1321), 21 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states 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 17:27:35,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:35,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:27:35,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:27:44,649 INFO L130 PetriNetUnfolder]: 3750/7728 cut-off events. [2022-11-25 17:27:44,649 INFO L131 PetriNetUnfolder]: For 277524/277524 co-relation queries the response was YES. [2022-11-25 17:27:44,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81057 conditions, 7728 events. 3750/7728 cut-off events. For 277524/277524 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 66857 event pairs, 485 based on Foata normal form. 117/7845 useless extension candidates. Maximal degree in co-relation 80762. Up to 3103 conditions per place. [2022-11-25 17:27:44,763 INFO L137 encePairwiseOnDemand]: 145/154 looper letters, 1149 selfloop transitions, 385 changer transitions 35/1569 dead transitions. [2022-11-25 17:27:44,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1569 transitions, 39597 flow [2022-11-25 17:27:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 17:27:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-25 17:27:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3148 transitions. [2022-11-25 17:27:44,781 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4349267753523073 [2022-11-25 17:27:44,782 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3148 transitions. [2022-11-25 17:27:44,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3148 transitions. [2022-11-25 17:27:44,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:27:44,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3148 transitions. [2022-11-25 17:27:44,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 66.97872340425532) internal successors, (3148), 47 states have internal predecessors, (3148), 0 states have call successors, (0), 0 states 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 17:27:44,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 154.0) internal successors, (7392), 48 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states 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 17:27:44,800 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 154.0) internal successors, (7392), 48 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states 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 17:27:44,800 INFO L175 Difference]: Start difference. First operand has 337 places, 965 transitions, 23840 flow. Second operand 47 states and 3148 transitions. [2022-11-25 17:27:44,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1569 transitions, 39597 flow [2022-11-25 17:27:49,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1569 transitions, 38748 flow, removed 324 selfloop flow, removed 2 redundant places. [2022-11-25 17:27:49,063 INFO L231 Difference]: Finished difference. Result has 397 places, 1081 transitions, 27688 flow [2022-11-25 17:27:49,064 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=23177, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=27688, PETRI_PLACES=397, PETRI_TRANSITIONS=1081} [2022-11-25 17:27:49,064 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 377 predicate places. [2022-11-25 17:27:49,064 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1081 transitions, 27688 flow [2022-11-25 17:27:49,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.904761904761905) internal successors, (1321), 21 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states 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 17:27:49,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:27:49,065 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:27:49,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 17:27:49,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:49,266 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 17:27:49,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:27:49,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1754952612, now seen corresponding path program 18 times [2022-11-25 17:27:49,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:27:49,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048603525] [2022-11-25 17:27:49,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:27:49,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:27:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:27:49,902 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 17:27:49,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:27:49,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048603525] [2022-11-25 17:27:49,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048603525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:27:49,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510507467] [2022-11-25 17:27:49,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:27:49,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:27:49,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:27:49,907 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:27:49,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 17:27:50,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 17:27:50,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:27:50,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:27:50,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:27:50,445 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 17:27:50,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:27:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:27:51,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510507467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:27:51,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:27:51,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2022-11-25 17:27:51,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444170000] [2022-11-25 17:27:51,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:27:51,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:27:51,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:27:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:27:51,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:27:51,714 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:27:51,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1081 transitions, 27688 flow. Second operand has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states 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 17:27:51,716 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:27:51,716 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:27:51,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:01,492 INFO L130 PetriNetUnfolder]: 4057/8438 cut-off events. [2022-11-25 17:28:01,493 INFO L131 PetriNetUnfolder]: For 294688/294688 co-relation queries the response was YES. [2022-11-25 17:28:01,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90731 conditions, 8438 events. 4057/8438 cut-off events. For 294688/294688 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 74840 event pairs, 200 based on Foata normal form. 36/8474 useless extension candidates. Maximal degree in co-relation 90420. Up to 2765 conditions per place. [2022-11-25 17:28:01,619 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 597 selfloop transitions, 642 changer transitions 36/1275 dead transitions. [2022-11-25 17:28:01,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1275 transitions, 34163 flow [2022-11-25 17:28:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-25 17:28:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-11-25 17:28:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2500 transitions. [2022-11-25 17:28:01,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42720437457279564 [2022-11-25 17:28:01,623 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2500 transitions. [2022-11-25 17:28:01,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2500 transitions. [2022-11-25 17:28:01,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:01,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2500 transitions. [2022-11-25 17:28:01,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 65.78947368421052) internal successors, (2500), 38 states have internal predecessors, (2500), 0 states have call successors, (0), 0 states 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 17:28:01,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 154.0) internal successors, (6006), 39 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states 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 17:28:01,636 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 154.0) internal successors, (6006), 39 states have internal predecessors, (6006), 0 states have call successors, (0), 0 states 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 17:28:01,637 INFO L175 Difference]: Start difference. First operand has 397 places, 1081 transitions, 27688 flow. Second operand 38 states and 2500 transitions. [2022-11-25 17:28:01,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1275 transitions, 34163 flow [2022-11-25 17:28:06,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 1275 transitions, 32588 flow, removed 689 selfloop flow, removed 15 redundant places. [2022-11-25 17:28:06,629 INFO L231 Difference]: Finished difference. Result has 432 places, 1156 transitions, 31195 flow [2022-11-25 17:28:06,630 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=26391, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=31195, PETRI_PLACES=432, PETRI_TRANSITIONS=1156} [2022-11-25 17:28:06,630 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 412 predicate places. [2022-11-25 17:28:06,630 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 1156 transitions, 31195 flow [2022-11-25 17:28:06,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states 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 17:28:06,630 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:06,631 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:06,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 17:28:06,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 17:28:06,831 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:28:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:06,832 INFO L85 PathProgramCache]: Analyzing trace with hash 970553234, now seen corresponding path program 19 times [2022-11-25 17:28:06,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:06,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175649164] [2022-11-25 17:28:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:06,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:07,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:07,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175649164] [2022-11-25 17:28:07,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175649164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:28:07,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134528352] [2022-11-25 17:28:07,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:28:07,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:07,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:07,291 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:07,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 17:28:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:07,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:28:07,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:28:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:07,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:28:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:28:08,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134528352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:28:08,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:28:08,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-25 17:28:08,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058636278] [2022-11-25 17:28:08,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:28:08,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:28:08,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:08,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:28:08,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:28:08,547 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:28:08,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 1156 transitions, 31195 flow. Second operand has 21 states, 21 states have (on average 62.714285714285715) internal successors, (1317), 21 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states 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 17:28:08,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:08,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:28:08,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:20,645 INFO L130 PetriNetUnfolder]: 4262/8883 cut-off events. [2022-11-25 17:28:20,646 INFO L131 PetriNetUnfolder]: For 356101/356101 co-relation queries the response was YES. [2022-11-25 17:28:20,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101565 conditions, 8883 events. 4262/8883 cut-off events. For 356101/356101 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 79803 event pairs, 202 based on Foata normal form. 38/8921 useless extension candidates. Maximal degree in co-relation 101220. Up to 1835 conditions per place. [2022-11-25 17:28:20,781 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 813 selfloop transitions, 900 changer transitions 29/1742 dead transitions. [2022-11-25 17:28:20,782 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1742 transitions, 49242 flow [2022-11-25 17:28:20,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:28:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 17:28:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3183 transitions. [2022-11-25 17:28:20,787 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43060064935064934 [2022-11-25 17:28:20,787 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3183 transitions. [2022-11-25 17:28:20,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3183 transitions. [2022-11-25 17:28:20,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:20,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3183 transitions. [2022-11-25 17:28:20,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 66.3125) internal successors, (3183), 48 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states 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 17:28:20,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 154.0) internal successors, (7546), 49 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states 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 17:28:20,804 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 154.0) internal successors, (7546), 49 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states 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 17:28:20,804 INFO L175 Difference]: Start difference. First operand has 432 places, 1156 transitions, 31195 flow. Second operand 48 states and 3183 transitions. [2022-11-25 17:28:20,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1742 transitions, 49242 flow [2022-11-25 17:28:28,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1742 transitions, 47998 flow, removed 534 selfloop flow, removed 19 redundant places. [2022-11-25 17:28:28,053 INFO L231 Difference]: Finished difference. Result has 469 places, 1447 transitions, 42389 flow [2022-11-25 17:28:28,054 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=30069, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=607, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=42389, PETRI_PLACES=469, PETRI_TRANSITIONS=1447} [2022-11-25 17:28:28,055 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 449 predicate places. [2022-11-25 17:28:28,055 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1447 transitions, 42389 flow [2022-11-25 17:28:28,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.714285714285715) internal successors, (1317), 21 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states 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 17:28:28,056 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:28,056 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:28,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 17:28:28,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 17:28:28,262 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:28:28,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash 753662126, now seen corresponding path program 20 times [2022-11-25 17:28:28,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:28,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028320737] [2022-11-25 17:28:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:28,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:28,771 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 17:28:28,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:28,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028320737] [2022-11-25 17:28:28,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028320737] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:28:28,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361852004] [2022-11-25 17:28:28,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:28:28,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:28,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:28,776 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:28,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 17:28:28,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:28:28,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:28:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:28:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:28:29,156 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 17:28:29,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:28:29,680 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 17:28:29,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361852004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:28:29,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:28:29,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-25 17:28:29,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718130013] [2022-11-25 17:28:29,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:28:29,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:28:29,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:29,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:28:29,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:28:30,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 154 [2022-11-25 17:28:30,224 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1447 transitions, 42389 flow. Second operand has 23 states, 23 states have (on average 64.91304347826087) internal successors, (1493), 23 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states 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 17:28:30,224 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:30,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 154 [2022-11-25 17:28:30,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:28:48,333 INFO L130 PetriNetUnfolder]: 4389/8988 cut-off events. [2022-11-25 17:28:48,333 INFO L131 PetriNetUnfolder]: For 405261/405261 co-relation queries the response was YES. [2022-11-25 17:28:48,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107108 conditions, 8988 events. 4389/8988 cut-off events. For 405261/405261 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 79762 event pairs, 262 based on Foata normal form. 106/9094 useless extension candidates. Maximal degree in co-relation 106868. Up to 2752 conditions per place. [2022-11-25 17:28:48,473 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 726 selfloop transitions, 969 changer transitions 8/1703 dead transitions. [2022-11-25 17:28:48,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 1703 transitions, 50167 flow [2022-11-25 17:28:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 17:28:48,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2022-11-25 17:28:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3550 transitions. [2022-11-25 17:28:48,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4433066933066933 [2022-11-25 17:28:48,480 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3550 transitions. [2022-11-25 17:28:48,480 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3550 transitions. [2022-11-25 17:28:48,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:28:48,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3550 transitions. [2022-11-25 17:28:48,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 68.26923076923077) internal successors, (3550), 52 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states 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 17:28:48,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states 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 17:28:48,496 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 154.0) internal successors, (8162), 53 states have internal predecessors, (8162), 0 states have call successors, (0), 0 states 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 17:28:48,497 INFO L175 Difference]: Start difference. First operand has 469 places, 1447 transitions, 42389 flow. Second operand 52 states and 3550 transitions. [2022-11-25 17:28:48,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 1703 transitions, 50167 flow [2022-11-25 17:28:56,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1703 transitions, 48000 flow, removed 1015 selfloop flow, removed 14 redundant places. [2022-11-25 17:28:56,558 INFO L231 Difference]: Finished difference. Result has 511 places, 1538 transitions, 45603 flow [2022-11-25 17:28:56,560 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=40274, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=874, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=45603, PETRI_PLACES=511, PETRI_TRANSITIONS=1538} [2022-11-25 17:28:56,560 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 491 predicate places. [2022-11-25 17:28:56,561 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1538 transitions, 45603 flow [2022-11-25 17:28:56,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 64.91304347826087) internal successors, (1493), 23 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states 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 17:28:56,561 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:28:56,562 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:28:56,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 17:28:56,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:56,768 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:28:56,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:56,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1654165422, now seen corresponding path program 21 times [2022-11-25 17:28:56,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:56,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105991841] [2022-11-25 17:28:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:56,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:28:57,407 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 17:28:57,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:57,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105991841] [2022-11-25 17:28:57,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105991841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:28:57,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64693789] [2022-11-25 17:28:57,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:28:57,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:57,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:57,411 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:57,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 17:28:57,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:28:57,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:28:57,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:28:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:28:57,991 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 17:28:57,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:28:58,452 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 17:28:58,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64693789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:28:58,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:28:58,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2022-11-25 17:28:58,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318067521] [2022-11-25 17:28:58,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:28:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 17:28:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 17:28:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:28:58,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:28:58,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1538 transitions, 45603 flow. Second operand has 26 states, 26 states have (on average 62.88461538461539) internal successors, (1635), 26 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states 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 17:28:58,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:28:58,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:28:58,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:15,752 INFO L130 PetriNetUnfolder]: 4984/10285 cut-off events. [2022-11-25 17:29:15,752 INFO L131 PetriNetUnfolder]: For 513912/513912 co-relation queries the response was YES. [2022-11-25 17:29:15,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125510 conditions, 10285 events. 4984/10285 cut-off events. For 513912/513912 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 94043 event pairs, 667 based on Foata normal form. 112/10397 useless extension candidates. Maximal degree in co-relation 125178. Up to 6916 conditions per place. [2022-11-25 17:29:15,958 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 1507 selfloop transitions, 457 changer transitions 19/1983 dead transitions. [2022-11-25 17:29:15,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1983 transitions, 60456 flow [2022-11-25 17:29:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 17:29:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-25 17:29:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4004 transitions. [2022-11-25 17:29:15,966 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2022-11-25 17:29:15,966 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4004 transitions. [2022-11-25 17:29:15,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4004 transitions. [2022-11-25 17:29:15,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:15,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4004 transitions. [2022-11-25 17:29:15,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 66.73333333333333) internal successors, (4004), 60 states have internal predecessors, (4004), 0 states have call successors, (0), 0 states 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 17:29:15,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 154.0) internal successors, (9394), 61 states have internal predecessors, (9394), 0 states have call successors, (0), 0 states 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 17:29:15,986 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 154.0) internal successors, (9394), 61 states have internal predecessors, (9394), 0 states have call successors, (0), 0 states 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 17:29:15,986 INFO L175 Difference]: Start difference. First operand has 511 places, 1538 transitions, 45603 flow. Second operand 60 states and 4004 transitions. [2022-11-25 17:29:15,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1983 transitions, 60456 flow [2022-11-25 17:29:27,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 1983 transitions, 58907 flow, removed 615 selfloop flow, removed 21 redundant places. [2022-11-25 17:29:27,499 INFO L231 Difference]: Finished difference. Result has 567 places, 1697 transitions, 51739 flow [2022-11-25 17:29:27,500 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=43968, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=51739, PETRI_PLACES=567, PETRI_TRANSITIONS=1697} [2022-11-25 17:29:27,501 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 547 predicate places. [2022-11-25 17:29:27,501 INFO L495 AbstractCegarLoop]: Abstraction has has 567 places, 1697 transitions, 51739 flow [2022-11-25 17:29:27,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 62.88461538461539) internal successors, (1635), 26 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states 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 17:29:27,501 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:29:27,502 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:29:27,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-25 17:29:27,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 17:29:27,702 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:29:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:29:27,703 INFO L85 PathProgramCache]: Analyzing trace with hash 983359790, now seen corresponding path program 22 times [2022-11-25 17:29:27,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:29:27,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091957302] [2022-11-25 17:29:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:29:27,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:29:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:29:28,160 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 17:29:28,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:29:28,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091957302] [2022-11-25 17:29:28,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091957302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:29:28,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510575168] [2022-11-25 17:29:28,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:29:28,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:29:28,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:29:28,163 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:29:28,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 17:29:28,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:29:28,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:29:28,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:29:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:29:28,659 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 17:29:28,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:29:29,331 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 17:29:29,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510575168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:29:29,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:29:29,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-25 17:29:29,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509247193] [2022-11-25 17:29:29,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:29:29,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 17:29:29,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:29:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 17:29:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-25 17:29:29,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:29:29,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 567 places, 1697 transitions, 51739 flow. Second operand has 21 states, 21 states have (on average 62.857142857142854) internal successors, (1320), 21 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states 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 17:29:29,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:29:29,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:29:29,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:29:35,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:29:40,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:29:55,211 INFO L130 PetriNetUnfolder]: 5611/11714 cut-off events. [2022-11-25 17:29:55,211 INFO L131 PetriNetUnfolder]: For 648303/648303 co-relation queries the response was YES. [2022-11-25 17:29:55,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146278 conditions, 11714 events. 5611/11714 cut-off events. For 648303/648303 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 110622 event pairs, 273 based on Foata normal form. 60/11774 useless extension candidates. Maximal degree in co-relation 145714. Up to 4433 conditions per place. [2022-11-25 17:29:55,472 INFO L137 encePairwiseOnDemand]: 144/154 looper letters, 1016 selfloop transitions, 1127 changer transitions 5/2148 dead transitions. [2022-11-25 17:29:55,472 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 2148 transitions, 67636 flow [2022-11-25 17:29:55,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 17:29:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-11-25 17:29:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3230 transitions. [2022-11-25 17:29:55,477 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43695887445887444 [2022-11-25 17:29:55,477 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3230 transitions. [2022-11-25 17:29:55,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3230 transitions. [2022-11-25 17:29:55,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:29:55,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3230 transitions. [2022-11-25 17:29:55,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 67.29166666666667) internal successors, (3230), 48 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:29:55,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 154.0) internal successors, (7546), 49 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states 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 17:29:55,493 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 154.0) internal successors, (7546), 49 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states 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 17:29:55,493 INFO L175 Difference]: Start difference. First operand has 567 places, 1697 transitions, 51739 flow. Second operand 48 states and 3230 transitions. [2022-11-25 17:29:55,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 2148 transitions, 67636 flow [2022-11-25 17:30:09,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 2148 transitions, 64717 flow, removed 1316 selfloop flow, removed 20 redundant places. [2022-11-25 17:30:09,938 INFO L231 Difference]: Finished difference. Result has 609 places, 1882 transitions, 59560 flow [2022-11-25 17:30:09,940 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=49124, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=964, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=676, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=59560, PETRI_PLACES=609, PETRI_TRANSITIONS=1882} [2022-11-25 17:30:09,940 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 589 predicate places. [2022-11-25 17:30:09,940 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 1882 transitions, 59560 flow [2022-11-25 17:30:09,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.857142857142854) internal successors, (1320), 21 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states 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 17:30:09,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:30:09,941 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:30:09,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 17:30:10,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:10,152 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:30:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:30:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1887654126, now seen corresponding path program 23 times [2022-11-25 17:30:10,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:30:10,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819035469] [2022-11-25 17:30:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:30:10,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:30:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:30:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:10,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:30:10,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819035469] [2022-11-25 17:30:10,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819035469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:30:10,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136403152] [2022-11-25 17:30:10,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:30:10,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:30:10,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:30:10,614 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:30:10,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 17:30:10,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 17:30:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:30:10,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:30:10,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:30:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:11,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:30:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:30:20,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136403152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:30:20,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:30:20,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-11-25 17:30:20,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045937513] [2022-11-25 17:30:20,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:30:20,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:30:20,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:30:20,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:30:20,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:30:20,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 154 [2022-11-25 17:30:20,687 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 1882 transitions, 59560 flow. Second operand has 20 states, 20 states have (on average 66.8) internal successors, (1336), 20 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 17:30:20,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:30:20,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 154 [2022-11-25 17:30:20,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:30:43,487 INFO L130 PetriNetUnfolder]: 5822/12064 cut-off events. [2022-11-25 17:30:43,487 INFO L131 PetriNetUnfolder]: For 737700/737700 co-relation queries the response was YES. [2022-11-25 17:30:43,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155171 conditions, 12064 events. 5822/12064 cut-off events. For 737700/737700 co-relation queries the response was YES. Maximal size of possible extension queue 1043. Compared 113639 event pairs, 139 based on Foata normal form. 110/12174 useless extension candidates. Maximal degree in co-relation 154565. Up to 3296 conditions per place. [2022-11-25 17:30:43,970 INFO L137 encePairwiseOnDemand]: 147/154 looper letters, 822 selfloop transitions, 1240 changer transitions 12/2074 dead transitions. [2022-11-25 17:30:43,970 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 638 places, 2074 transitions, 68548 flow [2022-11-25 17:30:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:30:43,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 17:30:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2105 transitions. [2022-11-25 17:30:43,975 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4556277056277056 [2022-11-25 17:30:43,975 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2105 transitions. [2022-11-25 17:30:43,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2105 transitions. [2022-11-25 17:30:43,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:30:43,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2105 transitions. [2022-11-25 17:30:43,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 70.16666666666667) internal successors, (2105), 30 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states 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 17:30:43,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 154.0) internal successors, (4774), 31 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states 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 17:30:43,983 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 154.0) internal successors, (4774), 31 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states 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 17:30:43,983 INFO L175 Difference]: Start difference. First operand has 609 places, 1882 transitions, 59560 flow. Second operand 30 states and 2105 transitions. [2022-11-25 17:30:43,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 638 places, 2074 transitions, 68548 flow [2022-11-25 17:31:00,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 2074 transitions, 67004 flow, removed 633 selfloop flow, removed 24 redundant places. [2022-11-25 17:31:00,443 INFO L231 Difference]: Finished difference. Result has 617 places, 1974 transitions, 64045 flow [2022-11-25 17:31:00,444 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=57621, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1867, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=64045, PETRI_PLACES=617, PETRI_TRANSITIONS=1974} [2022-11-25 17:31:00,444 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 597 predicate places. [2022-11-25 17:31:00,445 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1974 transitions, 64045 flow [2022-11-25 17:31:00,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 66.8) internal successors, (1336), 20 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states 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 17:31:00,445 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:00,445 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:00,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:00,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 17:31:00,646 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:31:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:00,646 INFO L85 PathProgramCache]: Analyzing trace with hash 198960412, now seen corresponding path program 24 times [2022-11-25 17:31:00,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:00,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434757803] [2022-11-25 17:31:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:00,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:00,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:00,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434757803] [2022-11-25 17:31:00,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434757803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:00,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201826237] [2022-11-25 17:31:00,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:31:00,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:00,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:00,988 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:31:00,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 17:31:01,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-25 17:31:01,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:31:01,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:31:01,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:01,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:01,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201826237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:01,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:31:01,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-25 17:31:01,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144453402] [2022-11-25 17:31:01,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:01,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 17:31:01,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:01,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 17:31:01,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-11-25 17:31:02,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:31:02,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1974 transitions, 64045 flow. Second operand has 18 states, 18 states have (on average 62.72222222222222) internal successors, (1129), 18 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:02,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:02,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:31:02,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:31:24,969 INFO L130 PetriNetUnfolder]: 6903/14492 cut-off events. [2022-11-25 17:31:24,969 INFO L131 PetriNetUnfolder]: For 946162/946162 co-relation queries the response was YES. [2022-11-25 17:31:25,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194361 conditions, 14492 events. 6903/14492 cut-off events. For 946162/946162 co-relation queries the response was YES. Maximal size of possible extension queue 1230. Compared 142153 event pairs, 1243 based on Foata normal form. 90/14582 useless extension candidates. Maximal degree in co-relation 193709. Up to 5072 conditions per place. [2022-11-25 17:31:25,438 INFO L137 encePairwiseOnDemand]: 146/154 looper letters, 1381 selfloop transitions, 1136 changer transitions 20/2537 dead transitions. [2022-11-25 17:31:25,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 2537 transitions, 87319 flow [2022-11-25 17:31:25,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-25 17:31:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-25 17:31:25,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3528 transitions. [2022-11-25 17:31:25,443 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4322469982847341 [2022-11-25 17:31:25,443 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3528 transitions. [2022-11-25 17:31:25,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3528 transitions. [2022-11-25 17:31:25,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:31:25,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3528 transitions. [2022-11-25 17:31:25,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 66.56603773584905) internal successors, (3528), 53 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states 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 17:31:25,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 154.0) internal successors, (8316), 54 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states 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 17:31:25,454 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 154.0) internal successors, (8316), 54 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states 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 17:31:25,454 INFO L175 Difference]: Start difference. First operand has 617 places, 1974 transitions, 64045 flow. Second operand 53 states and 3528 transitions. [2022-11-25 17:31:25,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 2537 transitions, 87319 flow [2022-11-25 17:31:48,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 2537 transitions, 84307 flow, removed 1107 selfloop flow, removed 24 redundant places. [2022-11-25 17:31:48,403 INFO L231 Difference]: Finished difference. Result has 661 places, 2239 transitions, 76293 flow [2022-11-25 17:31:48,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=61321, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=869, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=995, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=76293, PETRI_PLACES=661, PETRI_TRANSITIONS=2239} [2022-11-25 17:31:48,405 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 641 predicate places. [2022-11-25 17:31:48,405 INFO L495 AbstractCegarLoop]: Abstraction has has 661 places, 2239 transitions, 76293 flow [2022-11-25 17:31:48,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 62.72222222222222) internal successors, (1129), 18 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:31:48,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:31:48,406 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:31:48,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 17:31:48,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 17:31:48,606 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:31:48,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:31:48,607 INFO L85 PathProgramCache]: Analyzing trace with hash -717089720, now seen corresponding path program 25 times [2022-11-25 17:31:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:31:48,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264329867] [2022-11-25 17:31:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:31:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:31:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:48,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:31:48,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264329867] [2022-11-25 17:31:48,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264329867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:31:48,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709608418] [2022-11-25 17:31:48,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:31:48,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:31:48,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:31:48,976 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:31:48,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 17:31:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:31:49,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 17:31:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:31:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:31:49,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:31:49,699 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 17:31:49,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709608418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:31:49,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:31:49,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-11-25 17:31:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601585054] [2022-11-25 17:31:49,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:31:49,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:31:49,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:31:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:31:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:31:50,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:31:50,027 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 661 places, 2239 transitions, 76293 flow. Second operand has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states 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 17:31:50,027 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:31:50,027 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:31:50,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:15,679 INFO L130 PetriNetUnfolder]: 7964/16437 cut-off events. [2022-11-25 17:32:15,679 INFO L131 PetriNetUnfolder]: For 1143344/1143344 co-relation queries the response was YES. [2022-11-25 17:32:16,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225807 conditions, 16437 events. 7964/16437 cut-off events. For 1143344/1143344 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 162119 event pairs, 1619 based on Foata normal form. 385/16822 useless extension candidates. Maximal degree in co-relation 225234. Up to 12025 conditions per place. [2022-11-25 17:32:16,186 INFO L137 encePairwiseOnDemand]: 145/154 looper letters, 2029 selfloop transitions, 818 changer transitions 25/2872 dead transitions. [2022-11-25 17:32:16,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 2872 transitions, 102633 flow [2022-11-25 17:32:16,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 17:32:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-25 17:32:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3143 transitions. [2022-11-25 17:32:16,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43423597678916825 [2022-11-25 17:32:16,197 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3143 transitions. [2022-11-25 17:32:16,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3143 transitions. [2022-11-25 17:32:16,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:32:16,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3143 transitions. [2022-11-25 17:32:16,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 66.87234042553192) internal successors, (3143), 47 states have internal predecessors, (3143), 0 states have call successors, (0), 0 states 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 17:32:16,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 154.0) internal successors, (7392), 48 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states 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 17:32:16,210 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 154.0) internal successors, (7392), 48 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states 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 17:32:16,210 INFO L175 Difference]: Start difference. First operand has 661 places, 2239 transitions, 76293 flow. Second operand 47 states and 3143 transitions. [2022-11-25 17:32:16,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 2872 transitions, 102633 flow [2022-11-25 17:32:45,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2872 transitions, 99369 flow, removed 1585 selfloop flow, removed 12 redundant places. [2022-11-25 17:32:45,097 INFO L231 Difference]: Finished difference. Result has 714 places, 2547 transitions, 88232 flow [2022-11-25 17:32:45,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=73312, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=535, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=88232, PETRI_PLACES=714, PETRI_TRANSITIONS=2547} [2022-11-25 17:32:45,099 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 694 predicate places. [2022-11-25 17:32:45,099 INFO L495 AbstractCegarLoop]: Abstraction has has 714 places, 2547 transitions, 88232 flow [2022-11-25 17:32:45,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.95454545454545) internal successors, (1385), 22 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states 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 17:32:45,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:32:45,100 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:32:45,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 17:32:45,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 17:32:45,306 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:32:45,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:32:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1831601868, now seen corresponding path program 26 times [2022-11-25 17:32:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:32:45,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641137635] [2022-11-25 17:32:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:32:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:32:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:32:45,731 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 17:32:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:32:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641137635] [2022-11-25 17:32:45,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641137635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:32:45,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885244748] [2022-11-25 17:32:45,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:32:45,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:32:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:32:45,734 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:32:45,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 17:32:45,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:32:45,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:32:45,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:32:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:32:46,097 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 17:32:46,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:32:46,797 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 17:32:46,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885244748] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:32:46,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:32:46,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-25 17:32:46,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120751653] [2022-11-25 17:32:46,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:32:46,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 17:32:46,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:32:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 17:32:46,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-11-25 17:32:47,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:32:47,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 714 places, 2547 transitions, 88232 flow. Second operand has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states 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 17:32:47,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:32:47,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:32:47,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:32:51,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:32:57,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 17:33:30,301 INFO L130 PetriNetUnfolder]: 8537/17596 cut-off events. [2022-11-25 17:33:30,301 INFO L131 PetriNetUnfolder]: For 1341529/1341529 co-relation queries the response was YES. [2022-11-25 17:33:30,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251670 conditions, 17596 events. 8537/17596 cut-off events. For 1341529/1341529 co-relation queries the response was YES. Maximal size of possible extension queue 1494. Compared 175315 event pairs, 585 based on Foata normal form. 184/17780 useless extension candidates. Maximal degree in co-relation 250728. Up to 7110 conditions per place. [2022-11-25 17:33:30,865 INFO L137 encePairwiseOnDemand]: 145/154 looper letters, 1430 selfloop transitions, 1513 changer transitions 57/3000 dead transitions. [2022-11-25 17:33:30,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 3000 transitions, 108924 flow [2022-11-25 17:33:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 17:33:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-11-25 17:33:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 3276 transitions. [2022-11-25 17:33:30,871 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43413729128014844 [2022-11-25 17:33:30,871 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 3276 transitions. [2022-11-25 17:33:30,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 3276 transitions. [2022-11-25 17:33:30,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:30,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 3276 transitions. [2022-11-25 17:33:30,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 66.85714285714286) internal successors, (3276), 49 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states 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 17:33:30,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 154.0) internal successors, (7700), 50 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states 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 17:33:30,879 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 154.0) internal successors, (7700), 50 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states 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 17:33:30,880 INFO L175 Difference]: Start difference. First operand has 714 places, 2547 transitions, 88232 flow. Second operand 49 states and 3276 transitions. [2022-11-25 17:33:30,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 3000 transitions, 108924 flow [2022-11-25 17:34:12,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 3000 transitions, 105315 flow, removed 1741 selfloop flow, removed 13 redundant places. [2022-11-25 17:34:12,321 INFO L231 Difference]: Finished difference. Result has 777 places, 2771 transitions, 100309 flow [2022-11-25 17:34:12,323 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=85469, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=100309, PETRI_PLACES=777, PETRI_TRANSITIONS=2771} [2022-11-25 17:34:12,324 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 757 predicate places. [2022-11-25 17:34:12,324 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2771 transitions, 100309 flow [2022-11-25 17:34:12,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.90909090909091) internal successors, (1384), 22 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states 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 17:34:12,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:12,325 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:12,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:12,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 17:34:12,531 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:34:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1461181212, now seen corresponding path program 27 times [2022-11-25 17:34:12,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649513570] [2022-11-25 17:34:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:12,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:12,951 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 17:34:12,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:12,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649513570] [2022-11-25 17:34:12,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649513570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:12,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219323159] [2022-11-25 17:34:12,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:34:12,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:12,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:12,955 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:12,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 17:34:13,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:34:13,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:34:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:34:13,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:13,563 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 17:34:13,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:14,186 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 17:34:14,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219323159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:14,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:34:14,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-25 17:34:14,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021209413] [2022-11-25 17:34:14,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:14,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 17:34:14,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 17:34:14,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:34:14,651 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:34:14,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2771 transitions, 100309 flow. Second operand has 25 states, 25 states have (on average 62.96) internal successors, (1574), 25 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states 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 17:34:14,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:14,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:34:14,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:55,174 INFO L130 PetriNetUnfolder]: 9080/18811 cut-off events. [2022-11-25 17:34:55,174 INFO L131 PetriNetUnfolder]: For 1610649/1610649 co-relation queries the response was YES. [2022-11-25 17:34:55,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275543 conditions, 18811 events. 9080/18811 cut-off events. For 1610649/1610649 co-relation queries the response was YES. Maximal size of possible extension queue 1611. Compared 190562 event pairs, 764 based on Foata normal form. 186/18997 useless extension candidates. Maximal degree in co-relation 275279. Up to 8612 conditions per place. [2022-11-25 17:34:55,881 INFO L137 encePairwiseOnDemand]: 145/154 looper letters, 1480 selfloop transitions, 1671 changer transitions 18/3169 dead transitions. [2022-11-25 17:34:55,882 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 3169 transitions, 119182 flow [2022-11-25 17:34:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 17:34:55,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-25 17:34:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2388 transitions. [2022-11-25 17:34:55,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2022-11-25 17:34:55,884 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2388 transitions. [2022-11-25 17:34:55,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2388 transitions. [2022-11-25 17:34:55,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:55,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2388 transitions. [2022-11-25 17:34:55,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 66.33333333333333) internal successors, (2388), 36 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states 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 17:34:55,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 154.0) internal successors, (5698), 37 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states 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 17:34:55,890 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 154.0) internal successors, (5698), 37 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states 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 17:34:55,890 INFO L175 Difference]: Start difference. First operand has 777 places, 2771 transitions, 100309 flow. Second operand 36 states and 2388 transitions. [2022-11-25 17:34:55,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 3169 transitions, 119182 flow [2022-11-25 17:35:51,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 3169 transitions, 115686 flow, removed 1473 selfloop flow, removed 14 redundant places. [2022-11-25 17:35:51,897 INFO L231 Difference]: Finished difference. Result has 804 places, 2949 transitions, 109874 flow [2022-11-25 17:35:51,898 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=95805, PETRI_DIFFERENCE_MINUEND_PLACES=760, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=109874, PETRI_PLACES=804, PETRI_TRANSITIONS=2949} [2022-11-25 17:35:51,899 INFO L288 CegarLoopForPetriNet]: 20 programPoint places, 784 predicate places. [2022-11-25 17:35:51,899 INFO L495 AbstractCegarLoop]: Abstraction has has 804 places, 2949 transitions, 109874 flow [2022-11-25 17:35:51,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.96) internal successors, (1574), 25 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states 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 17:35:51,899 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:51,899 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:35:51,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 17:35:52,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:52,100 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-25 17:35:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1432774738, now seen corresponding path program 28 times [2022-11-25 17:35:52,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:35:52,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106846671] [2022-11-25 17:35:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:52,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:35:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:52,499 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 17:35:52,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:35:52,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106846671] [2022-11-25 17:35:52,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106846671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:35:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134003397] [2022-11-25 17:35:52,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:35:52,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:35:52,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:35:52,503 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:35:52,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a0c35e73-56cf-42d0-9e36-b263e95eab83/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 17:35:52,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:35:52,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:35:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:35:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:35:52,931 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 17:35:52,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:35:53,636 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 17:35:53,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134003397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:35:53,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:35:53,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 17:35:53,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561097473] [2022-11-25 17:35:53,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:35:53,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 17:35:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:35:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 17:35:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:35:54,072 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 154 [2022-11-25 17:35:54,073 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 804 places, 2949 transitions, 109874 flow. Second operand has 24 states, 24 states have (on average 62.875) internal successors, (1509), 24 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states 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 17:35:54,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:54,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 154 [2022-11-25 17:35:54,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand